16MnCrS5 vs 31CrMoV9: 40% composition overlap. Significantly different materials serving different application areas.
16MnCrS5 vs 31CrMoV9
Side-by-side chemical composition and mechanical property comparison.
Overview
16MnCrS5
1.7139
Free-cutting variant of 16MnCr5 (1.7131) — sulfur addition (0.020-0.040%) for improved machinability on CNC automatics. Same case-hardening properties: surface 60-62 HRC after carburizing. THE high-volume automotive gear steel where machining cost matters. Used for transmission gears, shafts, pinions, and other carburized parts produced on CNC lathes and multi-spindle automatics.
31CrMoV9
1.8519
THE standard nitriding steel — Cr-Mo-V combination optimized for gas nitriding. Vanadium refines grain and forms hard VN nitrides (surface >750 HV). Better core toughness than 31CrMo12 at similar strength. THE default choice when "nitriding steel" is specified without further detail. Used for crankshafts, gears, spindles, extrusion screws, and precision machine components.
| 16MnCrS5 | 31CrMoV9 | |
|---|---|---|
| Material Number | 1.7139 | 1.8519 |
| Category | Alloy Steel | Alloy Steel |
| Standard | EN 10084 | EN 10085 |
Chemical composition (wt%)
| Element | 16MnCrS5 | 31CrMoV9 | Overlap |
|---|---|---|---|
| C | 0.14–0.19% | 0.27–0.34% | No overlap |
| Si | 0–0.4% | 0–0.4% | OK |
| Mn | 1–1.3% | 0.4–0.7% | No overlap |
| P | 0–0.025% | 0–0.025% | OK |
Mechanical properties
| Property | 16MnCrS5 | 31CrMoV9 | Unit |
|---|---|---|---|
| hardness_hrc | 60–62 | — | HRC |
| tensile_strength | 700–1000 | 800–1000 | MPa |
| yield_strength | 450–700 | 600–750 | MPa |
Compatibility Assessment
16MnCrS5 and 31CrMoV9 have significantly different compositions (40% overlap). These materials are not interchangeable and serve different application areas.
Automated assessment based on composition analysis
Frequently Asked Questions
Is 16MnCrS5 the same as 31CrMoV9?
16MnCrS5 and 31CrMoV9 have a 40% composition overlap. They are generally not directly interchangeable.
Can I replace 16MnCrS5 with 31CrMoV9?
Generally not recommended. The compositions differ significantly (40% overlap). These materials have different alloying concepts and are intended for different applications.
What is the difference between 16MnCrS5 and 31CrMoV9?
The main differences are in the following elements: C, Mn, S, Cr. 16MnCrS5 is a Alloy Steel grade, while 31CrMoV9 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.