40NiCrMo7 vs 41CrMo4: 85% composition overlap. Some similarities but notable differences in alloying elements.
40NiCrMo7 vs 41CrMo4
Side-by-side chemical composition and mechanical property comparison.
Overview
40NiCrMo7
1.6563
High-nickel Cr-Mo quench & temper steel for large cross-sections. 1.6-2.0% Ni gives superior hardenability compared to 39NiCrMo3 — through-hardening up to ~130mm diameter. Close to AISI 4340 composition. Used for heavy crankshafts, large gears, turbine shafts, connecting rods, and critical structural fasteners in energy and heavy machinery sectors.
41CrMo4
1.7223
Chromium-molybdenum QT steel — very close to 42CrMo4 (1.7225) with slightly lower carbon. Essentially interchangeable with 42CrMo4 for most applications. Sometimes specified where marginally better weldability than 42CrMo4 is needed. Same applications: gears, shafts, crankshafts, bolts, hydraulic components.
| 40NiCrMo7 | 41CrMo4 | |
|---|---|---|
| Material Number | 1.6563 | 1.7223 |
| Category | Alloy Steel | Alloy Steel |
| Standard | EN 10083-3 | EN 10083-3 |
Chemical composition (wt%) — Pro
| Element | 40NiCrMo7 | 41CrMo4 | Overlap |
|---|---|---|---|
| C | 0.37–0.44% | 0.38–0.45% | Partial |
| Si | 0–0.4% | 0–0.4% | OK |
| Mn | 0.5–0.8% | 0.6–0.9% | Partial |
| P | 0–0.025% | 0–0.025% | OK |
| S | |||
| Cr | |||
| Mo | |||
| Ni |
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Sign up free — 3 comparisons/day freeMechanical properties — Pro
| Property | 40NiCrMo7 | 41CrMo4 | Unit |
|---|---|---|---|
| Tensile Strength | 980–1180 | 900–1100 | MPa |
| Yield Strength | 780–835 | 650–800 | MPa |
| Elongation | 10–14 | 11–16 | % |
| Hardness HB | |||
| Elastic Modulus | |||
| Density |
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Sign up free — 3 comparisons/day freeCompatibility Assessment
40NiCrMo7 and 41CrMo4 share some characteristics (85% overlap) but have notable differences. They may be substitutable in some applications but not all. Verify suitability carefully.
Automated assessment based on composition analysis
Frequently Asked Questions
Is 40NiCrMo7 the same as 41CrMo4?
40NiCrMo7 and 41CrMo4 have a 85% composition overlap. For most purposes, they can be considered similar.
Can I replace 40NiCrMo7 with 41CrMo4?
In many cases, yes. The compositions overlap significantly (85%). However, always verify mechanical property requirements and heat treatment compatibility for your specific application.
What is the difference between 40NiCrMo7 and 41CrMo4?
The main differences are in the following elements: C, Mn. 40NiCrMo7 is a Alloy Steel grade, while 41CrMo4 is a Alloy Steel grade.
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Data provided for reference only. Always verify against the applicable specification for critical applications.
All data is for reference only. Equivalents indicate similarity, not identity. Always verify against the applicable specification for safety-critical applications. materialref.com accepts no liability for decisions based on this data.