16MnCrS5 vs 51CrV4: 54% composition overlap. Moderate differences, generally not direct substitutes.
16MnCrS5 vs 51CrV4
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.
51CrV4
1.8159
Chromium-vanadium spring steel. The most important European spring steel grade. Excellent fatigue resistance and high elastic limit after heat treatment. Used for coil springs, leaf springs, torsion bars, anti-roll bars, and high-strength fasteners.
| 16MnCrS5 | 51CrV4 | |
|---|---|---|
| Material Number | 1.7139 | 1.8159 |
| Category | Alloy Steel | Alloy Steel |
| Standard | EN 10084 | EN 10089 |
Chemical composition (wt%)
| Element | 16MnCrS5 | 51CrV4 | Overlap |
|---|---|---|---|
| C | 0.14–0.19% | 0.47–0.55% | No overlap |
| Si | 0–0.4% | 0–0.4% | OK |
| Mn | 1–1.3% | 0.7–1.1% | Partial |
| P | 0–0.025% | 0–0.025% | OK |
Mechanical properties
| Property | 16MnCrS5 | 51CrV4 | Unit |
|---|---|---|---|
| hardness_hrc | 60–62 | 36–42 | HRC |
| tensile_strength | 700–1000 | 1100–1300 | MPa |
| yield_strength | 450–700 | ≥ 900 | MPa |
Compatibility Assessment
16MnCrS5 and 51CrV4 have moderate differences (54% overlap). They are generally not direct substitutes. Consider the specific requirements of your application.
Automated assessment based on composition analysis
Frequently Asked Questions
Is 16MnCrS5 the same as 51CrV4?
16MnCrS5 and 51CrV4 have a 54% composition overlap. They are generally not directly interchangeable.
Can I replace 16MnCrS5 with 51CrV4?
Generally not recommended. The compositions differ significantly (54% overlap). These materials have different alloying concepts and are intended for different applications.
What is the difference between 16MnCrS5 and 51CrV4?
The main differences are in the following elements: C, Mn, S, Cr. 16MnCrS5 is a Alloy Steel grade, while 51CrV4 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.