diff --git a/src/Mod/Fem/App/FemConstraint.cpp b/src/Mod/Fem/App/FemConstraint.cpp
index 91ae981391..6e48bdc599 100644
--- a/src/Mod/Fem/App/FemConstraint.cpp
+++ b/src/Mod/Fem/App/FemConstraint.cpp
@@ -197,14 +197,13 @@ void Constraint::onChanged(const App::Property* prop)
     App::DocumentObject::onChanged(prop);
 }
 
-void Constraint::slotChangedObject(const App::DocumentObject& obj, const App::Property& prop)
+void Constraint::slotChangedObject(const App::DocumentObject& Obj, const App::Property& Prop)
 {
-    if (obj.isDerivedFrom<App::GeoFeature>()
-        && (prop.isDerivedFrom<App::PropertyPlacement>() || obj.isRemoving())) {
-        auto values = References.getValues();
-        for (const auto ref : values) {
+    if (Obj.isDerivedFrom<App::GeoFeature>()
+        && (Prop.isDerivedFrom<App::PropertyPlacement>() || Obj.isRemoving())) {
+        for (const auto ref : References.getValues()) {
             auto v = ref->getInListEx(true);
-            if ((&obj == ref) || (std::find(v.begin(), v.end(), &obj) != v.end())) {
+            if ((&Obj == ref) || (std::ranges::find(v, &Obj) != v.end())) {
                 this->touch();
                 return;
             }
diff --git a/src/Mod/Fem/App/FemMesh.cpp b/src/Mod/Fem/App/FemMesh.cpp
index 05eed1749f..9802d218cc 100644
--- a/src/Mod/Fem/App/FemMesh.cpp
+++ b/src/Mod/Fem/App/FemMesh.cpp
@@ -521,7 +521,7 @@ std::map<int, int> FemMesh::getccxVolumesByFace(const TopoDS_Face& face) const
             int missing_node = 0;
             for (int i = 0; i < 4; i++) {
                 // search for the ID of the volume which is not part of 'element_face_nodes'
-                if (std::find(element_face_nodes.begin(), element_face_nodes.end(), apair.second[i])
+                if (std::ranges::find(element_face_nodes, apair.second[i])
                     == element_face_nodes.end()) {
                     missing_node = i + 1;
                     break;
diff --git a/src/Mod/Fem/App/FemPostFilter.cpp b/src/Mod/Fem/App/FemPostFilter.cpp
index 1bb70fe426..1e2bc4f4ac 100644
--- a/src/Mod/Fem/App/FemPostFilter.cpp
+++ b/src/Mod/Fem/App/FemPostFilter.cpp
@@ -826,8 +826,7 @@ void FemPostContoursFilter::refreshFields()
     Field.setValue(m_fields);
 
     // search if the current field is in the available ones and set it
-    std::vector<std::string>::iterator it =
-        std::find(FieldsArray.begin(), FieldsArray.end(), fieldName);
+    const auto it = std::ranges::find(FieldsArray, fieldName);
     if (!fieldName.empty() && it != FieldsArray.end()) {
         Field.setValue(fieldName.c_str());
     }
@@ -884,7 +883,7 @@ void FemPostContoursFilter::refreshVectors()
     VectorMode.setValue(m_vectors);
 
     // apply stored name
-    auto it = std::find(vectorArray.begin(), vectorArray.end(), vectorName);
+    const auto it = std::ranges::find(vectorArray, vectorName);
     if (!vectorName.empty() && it != vectorArray.end()) {
         VectorMode.setValue(vectorName.c_str());
     }
@@ -1004,8 +1003,7 @@ DocumentObjectExecReturn* FemPostScalarClipFilter::execute()
     Scalars.setValue(m_scalarFields);
 
     // search if the current field is in the available ones and set it
-    std::vector<std::string>::iterator it =
-        std::find(ScalarsArray.begin(), ScalarsArray.end(), val);
+    const auto it = std::ranges::find(ScalarsArray, val);
     if (!val.empty() && it != ScalarsArray.end()) {
         Scalars.setValue(val.c_str());
     }
@@ -1123,7 +1121,7 @@ DocumentObjectExecReturn* FemPostWarpVectorFilter::execute()
     Vector.setValue(m_vectorFields);
 
     // search if the current field is in the available ones and set it
-    std::vector<std::string>::iterator it = std::find(VectorArray.begin(), VectorArray.end(), val);
+    const auto it = std::ranges::find(VectorArray, val);
     if (!val.empty() && it != VectorArray.end()) {
         Vector.setValue(val.c_str());
     }
diff --git a/src/Mod/Fem/App/FemVTKTools.cpp b/src/Mod/Fem/App/FemVTKTools.cpp
index 382ff07455..fabd68b3d8 100644
--- a/src/Mod/Fem/App/FemVTKTools.cpp
+++ b/src/Mod/Fem/App/FemVTKTools.cpp
@@ -1533,7 +1533,7 @@ void readResults(std::ifstream& ifstr,
                 for (auto it = sub.begin(); it != sub.end(); it += 12, ++countScaPos) {
                     valueFromLine(it, 12, value);
                     // search if value is scalar or vector/matrix component
-                    auto pos = std::find(scalarPos.begin(), scalarPos.end(), countScaPos);
+                    auto pos = std::ranges::find(scalarPos, countScaPos);
                     if (pos == scalarPos.end()) {
                         vecValues.emplace_back(value);
                     }
@@ -1552,7 +1552,7 @@ void readResults(std::ifstream& ifstr,
             for (auto it = sub.begin(); it != sub.end(); it += 12) {
                 valueFromLine(it, 12, value);
                 // search if value is scalar or vector/matrix component
-                auto pos = std::find(scalarPos.begin(), scalarPos.end(), countScaPos);
+                auto pos = std::ranges::find(scalarPos, countScaPos);
                 if (pos == scalarPos.end()) {
                     vecValues.emplace_back(value);
                 }
diff --git a/src/Mod/Fem/Gui/TaskFemConstraintContact.cpp b/src/Mod/Fem/Gui/TaskFemConstraintContact.cpp
index fbf3eb6891..2b49edb781 100644
--- a/src/Mod/Fem/Gui/TaskFemConstraintContact.cpp
+++ b/src/Mod/Fem/Gui/TaskFemConstraintContact.cpp
@@ -230,9 +230,7 @@ void TaskFemConstraintContact::addToSelectionSlave()
                 QMessageBox::warning(this, tr("Selection error"), tr("Only faces can be picked"));
                 return;
             }
-            for (std::vector<std::string>::iterator itr =
-                     std::find(SubElements.begin(), SubElements.end(), subName);
-                 itr != SubElements.end();
+            for (auto itr = std::ranges::find(SubElements, subName); itr != SubElements.end();
                  itr = std::find(++itr,
                                  SubElements.end(),
                                  subName)) {  // for every sub element in selection that
@@ -279,9 +277,7 @@ void TaskFemConstraintContact::removeFromSelectionSlave()
         const App::DocumentObject* obj = it.getObject();
 
         for (const auto& subName : subNames) {  // for every selected sub element
-            for (std::vector<std::string>::iterator itr =
-                     std::find(SubElements.begin(), SubElements.end(), subName);
-                 itr != SubElements.end();
+            for (auto itr = std::ranges::find(SubElements, subName); itr != SubElements.end();
                  itr = std::find(++itr,
                                  SubElements.end(),
                                  subName)) {  // for every sub element in selection that
@@ -359,8 +355,7 @@ void TaskFemConstraintContact::addToSelectionMaster()
                 QMessageBox::warning(this, tr("Selection error"), tr("Only faces can be picked"));
                 return;
             }
-            for (std::vector<std::string>::iterator itr =
-                     std::find(SubElements.begin(), SubElements.end(), subName);
+            for (auto itr = std::ranges::find(SubElements.begin(), SubElements.end(), subName);
                  itr != SubElements.end();
                  itr = std::find(++itr,
                                  SubElements.end(),
@@ -408,9 +403,7 @@ void TaskFemConstraintContact::removeFromSelectionMaster()
         const App::DocumentObject* obj = it.getObject();
 
         for (const auto& subName : subNames) {  // for every selected sub element
-            for (std::vector<std::string>::iterator itr =
-                     std::find(SubElements.begin(), SubElements.end(), subName);
-                 itr != SubElements.end();
+            for (auto itr = std::ranges::find(SubElements, subName); itr != SubElements.end();
                  itr = std::find(++itr,
                                  SubElements.end(),
                                  subName)) {  // for every sub element in selection that
diff --git a/src/Mod/Fem/Gui/TaskFemConstraintDisplacement.cpp b/src/Mod/Fem/Gui/TaskFemConstraintDisplacement.cpp
index 69538df7fe..e4c490860b 100644
--- a/src/Mod/Fem/Gui/TaskFemConstraintDisplacement.cpp
+++ b/src/Mod/Fem/Gui/TaskFemConstraintDisplacement.cpp
@@ -254,8 +254,7 @@ void TaskFemConstraintDisplacement::addToSelection()
         App::DocumentObject* obj = it.getObject();
         for (const auto& subName : subNames) {  // for every selected sub element
             bool addMe = true;
-            for (std::vector<std::string>::iterator itr =
-                     std::find(SubElements.begin(), SubElements.end(), subName);
+            for (auto itr = std::ranges::find(SubElements.begin(), SubElements.end(), subName);
                  itr != SubElements.end();
                  itr = std::find(++itr,
                                  SubElements.end(),
@@ -325,9 +324,7 @@ void TaskFemConstraintDisplacement::removeFromSelection()
         const App::DocumentObject* obj = it.getObject();
 
         for (const auto& subName : subNames) {  // for every selected sub element
-            for (std::vector<std::string>::iterator itr =
-                     std::find(SubElements.begin(), SubElements.end(), subName);
-                 itr != SubElements.end();
+            for (auto itr = std::ranges::find(SubElements, subName); itr != SubElements.end();
                  itr = std::find(++itr,
                                  SubElements.end(),
                                  subName)) {  // for every sub element in selection that
diff --git a/src/Mod/Fem/Gui/TaskFemConstraintFixed.cpp b/src/Mod/Fem/Gui/TaskFemConstraintFixed.cpp
index 42d6bdbd68..86899e667a 100644
--- a/src/Mod/Fem/Gui/TaskFemConstraintFixed.cpp
+++ b/src/Mod/Fem/Gui/TaskFemConstraintFixed.cpp
@@ -124,9 +124,7 @@ void TaskFemConstraintFixed::addToSelection()
             ConstraintView->getObject()->getDocument()->getObject(it.getFeatName());
         for (const auto& subName : subNames) {  // for every selected sub element
             bool addMe = true;
-            for (std::vector<std::string>::iterator itr =
-                     std::find(SubElements.begin(), SubElements.end(), subName);
-                 itr != SubElements.end();
+            for (auto itr = std::ranges::find(SubElements, subName); itr != SubElements.end();
                  itr = std::find(++itr,
                                  SubElements.end(),
                                  subName)) {  // for every sub element in selection that
@@ -194,9 +192,7 @@ void TaskFemConstraintFixed::removeFromSelection()
         const App::DocumentObject* obj = it.getObject();
 
         for (const auto& subName : subNames) {  // for every selected sub element
-            for (std::vector<std::string>::iterator itr =
-                     std::find(SubElements.begin(), SubElements.end(), subName);
-                 itr != SubElements.end();
+            for (auto itr = std::ranges::find(SubElements, subName); itr != SubElements.end();
                  itr = std::find(++itr,
                                  SubElements.end(),
                                  subName)) {  // for every sub element in selection that
diff --git a/src/Mod/Fem/Gui/TaskFemConstraintFluidBoundary.cpp b/src/Mod/Fem/Gui/TaskFemConstraintFluidBoundary.cpp
index fedea39960..ff11970ea9 100644
--- a/src/Mod/Fem/Gui/TaskFemConstraintFluidBoundary.cpp
+++ b/src/Mod/Fem/Gui/TaskFemConstraintFluidBoundary.cpp
@@ -833,9 +833,7 @@ void TaskFemConstraintFluidBoundary::addToSelection()
         App::DocumentObject* obj = it.getObject();
         for (const auto& subName : subNames) {  // for every selected sub element
             bool addMe = true;
-            for (std::vector<std::string>::iterator itr =
-                     std::find(SubElements.begin(), SubElements.end(), subName);
-                 itr != SubElements.end();
+            for (auto itr = std::ranges::find(SubElements, subName); itr != SubElements.end();
                  itr = std::find(++itr,
                                  SubElements.end(),
                                  subName)) {  // for every sub element in selection that
@@ -905,9 +903,7 @@ void TaskFemConstraintFluidBoundary::removeFromSelection()
         const App::DocumentObject* obj = it.getObject();
 
         for (const auto& subName : subNames) {  // for every selected sub element
-            for (std::vector<std::string>::iterator itr =
-                     std::find(SubElements.begin(), SubElements.end(), subName);
-                 itr != SubElements.end();
+            for (auto itr = std::ranges::find(SubElements, subName); itr != SubElements.end();
                  itr = std::find(++itr,
                                  SubElements.end(),
                                  subName)) {  // for every sub element in selection that
diff --git a/src/Mod/Fem/Gui/TaskFemConstraintForce.cpp b/src/Mod/Fem/Gui/TaskFemConstraintForce.cpp
index 41fd4079fa..236fdef904 100644
--- a/src/Mod/Fem/Gui/TaskFemConstraintForce.cpp
+++ b/src/Mod/Fem/Gui/TaskFemConstraintForce.cpp
@@ -139,9 +139,7 @@ void TaskFemConstraintForce::addToSelection()
         App::DocumentObject* obj = it.getObject();
         for (const auto& subName : subNames) {  // for every selected sub element
             bool addMe = true;
-            for (std::vector<std::string>::iterator itr =
-                     std::find(SubElements.begin(), SubElements.end(), subName);
-                 itr != SubElements.end();
+            for (auto itr = std::ranges::find(SubElements, subName); itr != SubElements.end();
                  itr = std::find(++itr,
                                  SubElements.end(),
                                  subName)) {  // for every sub element in selection that
@@ -210,9 +208,7 @@ void TaskFemConstraintForce::removeFromSelection()
         const App::DocumentObject* obj = it.getObject();
 
         for (const auto& subName : subNames) {  // for every selected sub element
-            for (std::vector<std::string>::iterator itr =
-                     std::find(SubElements.begin(), SubElements.end(), subName);
-                 itr != SubElements.end();
+            for (auto itr = std::ranges::find(SubElements, subName); itr != SubElements.end();
                  itr = std::find(++itr,
                                  SubElements.end(),
                                  subName)) {  // for every sub element in selection that
diff --git a/src/Mod/Fem/Gui/TaskFemConstraintHeatflux.cpp b/src/Mod/Fem/Gui/TaskFemConstraintHeatflux.cpp
index 1afd064fd2..41651983ef 100644
--- a/src/Mod/Fem/Gui/TaskFemConstraintHeatflux.cpp
+++ b/src/Mod/Fem/Gui/TaskFemConstraintHeatflux.cpp
@@ -294,8 +294,7 @@ void TaskFemConstraintHeatflux::addToSelection()
         }
         for (const auto& subName : subNames) {  // for every selected sub element
             bool addMe = true;
-            for (std::vector<std::string>::iterator itr =
-                     std::find(SubElements.begin(), SubElements.end(), subName);
+            for (auto itr = std::ranges::find(SubElements.begin(), SubElements.end(), subName);
                  itr != SubElements.end();
                  itr = std::find(++itr,
                                  SubElements.end(),
@@ -358,9 +357,7 @@ void TaskFemConstraintHeatflux::removeFromSelection()
             // SubElements
         }
         for (const auto& subName : subNames) {  // for every selected sub element
-            for (std::vector<std::string>::iterator itr =
-                     std::find(SubElements.begin(), SubElements.end(), subName);
-                 itr != SubElements.end();
+            for (auto itr = std::ranges::find(SubElements, subName); itr != SubElements.end();
                  itr = std::find(++itr,
                                  SubElements.end(),
                                  subName)) {  // for every sub element in selection that
diff --git a/src/Mod/Fem/Gui/TaskFemConstraintPlaneRotation.cpp b/src/Mod/Fem/Gui/TaskFemConstraintPlaneRotation.cpp
index 66758f3a03..76cbccfc52 100644
--- a/src/Mod/Fem/Gui/TaskFemConstraintPlaneRotation.cpp
+++ b/src/Mod/Fem/Gui/TaskFemConstraintPlaneRotation.cpp
@@ -171,8 +171,7 @@ void TaskFemConstraintPlaneRotation::addToSelection()
                             return;
                         }
                     }
-                    for (std::vector<std::string>::iterator itr =
-                             std::find(SubElements.begin(), SubElements.end(), subName);
+                    for (auto itr = std::ranges::find(SubElements, subName);
                          itr != SubElements.end();
                          itr = std::find(++itr,
                                          SubElements.end(),
@@ -231,9 +230,7 @@ void TaskFemConstraintPlaneRotation::removeFromSelection()
         const App::DocumentObject* obj = it.getObject();
 
         for (const auto& subName : subNames) {  // for every selected sub element
-            for (std::vector<std::string>::iterator itr =
-                     std::find(SubElements.begin(), SubElements.end(), subName);
-                 itr != SubElements.end();
+            for (auto itr = std::ranges::find(SubElements, subName); itr != SubElements.end();
                  itr = std::find(++itr,
                                  SubElements.end(),
                                  subName)) {  // for every sub element in selection that
@@ -248,7 +245,7 @@ void TaskFemConstraintPlaneRotation::removeFromSelection()
             }
         }
     }
-    std::sort(itemsToDel.begin(), itemsToDel.end());
+    std::ranges::sort(itemsToDel);
     while (!itemsToDel.empty()) {
         Objects.erase(Objects.begin() + itemsToDel.back());
         SubElements.erase(SubElements.begin() + itemsToDel.back());
diff --git a/src/Mod/Fem/Gui/TaskFemConstraintPressure.cpp b/src/Mod/Fem/Gui/TaskFemConstraintPressure.cpp
index 508ca6d262..030cfc9c1c 100644
--- a/src/Mod/Fem/Gui/TaskFemConstraintPressure.cpp
+++ b/src/Mod/Fem/Gui/TaskFemConstraintPressure.cpp
@@ -149,9 +149,7 @@ void TaskFemConstraintPressure::addToSelection()
                 QMessageBox::warning(this, tr("Selection error"), tr("Only faces can be picked"));
                 return;
             }
-            for (std::vector<std::string>::iterator itr =
-                     std::find(SubElements.begin(), SubElements.end(), subName);
-                 itr != SubElements.end();
+            for (auto itr = std::ranges::find(SubElements, subName); itr != SubElements.end();
                  itr = std::find(++itr,
                                  SubElements.end(),
                                  subName)) {  // for every sub element in selection that
@@ -198,9 +196,7 @@ void TaskFemConstraintPressure::removeFromSelection()
         const App::DocumentObject* obj = it.getObject();
 
         for (const auto& subName : subNames) {  // for every selected sub element
-            for (std::vector<std::string>::iterator itr =
-                     std::find(SubElements.begin(), SubElements.end(), subName);
-                 itr != SubElements.end();
+            for (auto itr = std::ranges::find(SubElements, subName); itr != SubElements.end();
                  itr = std::find(++itr,
                                  SubElements.end(),
                                  subName)) {  // for every sub element in selection that
@@ -215,7 +211,7 @@ void TaskFemConstraintPressure::removeFromSelection()
             }
         }
     }
-    std::sort(itemsToDel.begin(), itemsToDel.end());
+    std::ranges::sort(itemsToDel);
     while (!itemsToDel.empty()) {
         Objects.erase(Objects.begin() + itemsToDel.back());
         SubElements.erase(SubElements.begin() + itemsToDel.back());
diff --git a/src/Mod/Fem/Gui/TaskFemConstraintRigidBody.cpp b/src/Mod/Fem/Gui/TaskFemConstraintRigidBody.cpp
index a7dc00b416..70da10d875 100644
--- a/src/Mod/Fem/Gui/TaskFemConstraintRigidBody.cpp
+++ b/src/Mod/Fem/Gui/TaskFemConstraintRigidBody.cpp
@@ -289,8 +289,7 @@ void TaskFemConstraintRigidBody::addToSelection()
         for (size_t subIt = 0; subIt < (subNames.size());
              ++subIt) {  // for every selected sub element
             bool addMe = true;
-            for (std::vector<std::string>::iterator itr =
-                     std::find(SubElements.begin(), SubElements.end(), subNames[subIt]);
+            for (auto itr = std::ranges::find(SubElements, subNames[subIt]);
                  itr != SubElements.end();
                  itr = std::find(++itr,
                                  SubElements.end(),
@@ -361,8 +360,7 @@ void TaskFemConstraintRigidBody::removeFromSelection()
 
         for (size_t subIt = 0; subIt < (subNames.size());
              ++subIt) {  // for every selected sub element
-            for (std::vector<std::string>::iterator itr =
-                     std::find(SubElements.begin(), SubElements.end(), subNames[subIt]);
+            for (auto itr = std::ranges::find(SubElements, subNames[subIt]);
                  itr != SubElements.end();
                  itr = std::find(++itr,
                                  SubElements.end(),
diff --git a/src/Mod/Fem/Gui/TaskFemConstraintSpring.cpp b/src/Mod/Fem/Gui/TaskFemConstraintSpring.cpp
index 1dace9d2a8..4f09a745b8 100644
--- a/src/Mod/Fem/Gui/TaskFemConstraintSpring.cpp
+++ b/src/Mod/Fem/Gui/TaskFemConstraintSpring.cpp
@@ -147,9 +147,7 @@ void TaskFemConstraintSpring::addToSelection()
                 QMessageBox::warning(this, tr("Selection error"), tr("Only faces can be picked"));
                 return;
             }
-            for (std::vector<std::string>::iterator itr =
-                     std::find(SubElements.begin(), SubElements.end(), subName);
-                 itr != SubElements.end();
+            for (auto itr = std::ranges::find(SubElements, subName); itr != SubElements.end();
                  itr = std::find(++itr,
                                  SubElements.end(),
                                  subName)) {  // for every sub element in selection that
@@ -196,9 +194,7 @@ void TaskFemConstraintSpring::removeFromSelection()
         const App::DocumentObject* obj = it.getObject();
 
         for (const auto& subName : subNames) {  // for every selected sub element
-            for (std::vector<std::string>::iterator itr =
-                     std::find(SubElements.begin(), SubElements.end(), subName);
-                 itr != SubElements.end();
+            for (auto itr = std::ranges::find(SubElements, subName); itr != SubElements.end();
                  itr = std::find(++itr,
                                  SubElements.end(),
                                  subName)) {  // for every sub element in selection that
diff --git a/src/Mod/Fem/Gui/TaskFemConstraintTemperature.cpp b/src/Mod/Fem/Gui/TaskFemConstraintTemperature.cpp
index defc1a59c9..c989436740 100644
--- a/src/Mod/Fem/Gui/TaskFemConstraintTemperature.cpp
+++ b/src/Mod/Fem/Gui/TaskFemConstraintTemperature.cpp
@@ -204,9 +204,7 @@ void TaskFemConstraintTemperature::addToSelection()
             ConstraintView->getObject()->getDocument()->getObject(it.getFeatName());
         for (const auto& subName : subNames) {  // for every selected sub element
             bool addMe = true;
-            for (std::vector<std::string>::iterator itr =
-                     std::find(SubElements.begin(), SubElements.end(), subName);
-                 itr != SubElements.end();
+            for (auto itr = std::ranges::find(SubElements, subName); itr != SubElements.end();
                  itr = std::find(++itr,
                                  SubElements.end(),
                                  subName)) {  // for every sub element in selection that
@@ -254,9 +252,7 @@ void TaskFemConstraintTemperature::removeFromSelection()
         const App::DocumentObject* obj = it.getObject();
 
         for (const auto& subName : subNames) {  // for every selected sub element
-            for (std::vector<std::string>::iterator itr =
-                     std::find(SubElements.begin(), SubElements.end(), subName);
-                 itr != SubElements.end();
+            for (auto itr = std::ranges::find(SubElements, subName); itr != SubElements.end();
                  itr = std::find(++itr,
                                  SubElements.end(),
                                  subName)) {  // for every sub element in selection that
@@ -271,7 +267,7 @@ void TaskFemConstraintTemperature::removeFromSelection()
             }
         }
     }
-    std::sort(itemsToDel.begin(), itemsToDel.end());
+    std::ranges::sort(itemsToDel);
     while (!itemsToDel.empty()) {
         Objects.erase(Objects.begin() + itemsToDel.back());
         SubElements.erase(SubElements.begin() + itemsToDel.back());
diff --git a/src/Mod/Fem/Gui/TaskFemConstraintTransform.cpp b/src/Mod/Fem/Gui/TaskFemConstraintTransform.cpp
index 7bba532a29..d53e476f37 100644
--- a/src/Mod/Fem/Gui/TaskFemConstraintTransform.cpp
+++ b/src/Mod/Fem/Gui/TaskFemConstraintTransform.cpp
@@ -349,9 +349,7 @@ void TaskFemConstraintTransform::addToSelection()
                     }
                 }
             }
-            for (std::vector<std::string>::iterator itr =
-                     std::find(SubElements.begin(), SubElements.end(), subName);
-                 itr != SubElements.end();
+            for (auto itr = std::ranges::find(SubElements, subName); itr != SubElements.end();
                  itr = std::find(++itr,
                                  SubElements.end(),
                                  subName)) {  // for every sub element in selection that
@@ -433,9 +431,7 @@ void TaskFemConstraintTransform::removeFromSelection()
         const App::DocumentObject* obj = it.getObject();
 
         for (const auto& subName : subNames) {  // for every selected sub element
-            for (std::vector<std::string>::iterator itr =
-                     std::find(SubElements.begin(), SubElements.end(), subName);
-                 itr != SubElements.end();
+            for (auto itr = std::ranges::find(SubElements, subName); itr != SubElements.end();
                  itr = std::find(++itr,
                                  SubElements.end(),
                                  subName)) {  // for every sub element in selection that
@@ -450,7 +446,7 @@ void TaskFemConstraintTransform::removeFromSelection()
             }
         }
     }
-    std::sort(itemsToDel.begin(), itemsToDel.end());
+    std::ranges::sort(itemsToDel);
     while (!itemsToDel.empty()) {
         Objects.erase(Objects.begin() + itemsToDel.back());
         SubElements.erase(SubElements.begin() + itemsToDel.back());
diff --git a/src/Mod/Fem/Gui/ViewProviderFemPostObject.cpp b/src/Mod/Fem/Gui/ViewProviderFemPostObject.cpp
index 32b68bf036..9cd98b449d 100644
--- a/src/Mod/Fem/Gui/ViewProviderFemPostObject.cpp
+++ b/src/Mod/Fem/Gui/ViewProviderFemPostObject.cpp
@@ -430,7 +430,7 @@ void ViewProviderFemPostObject::updateProperties()
     m_coloringEnum.setEnums(colorArrays);
     Field.setValue(m_coloringEnum);
 
-    std::vector<std::string>::iterator it = std::find(colorArrays.begin(), colorArrays.end(), val);
+    auto it = std::ranges::find(colorArrays, val);
     if (!val.empty() && it != colorArrays.end()) {
         Field.setValue(val.c_str());
     }
@@ -472,7 +472,7 @@ void ViewProviderFemPostObject::updateProperties()
     m_vectorEnum.setEnums(colorArrays);
     VectorMode.setValue(m_vectorEnum);
 
-    it = std::find(colorArrays.begin(), colorArrays.end(), val);
+    it = std::ranges::find(colorArrays, val);
     if (!val.empty() && it != colorArrays.end()) {
         VectorMode.setValue(val.c_str());
     }