20NiCrMo2-2 vs 33CrMoV12-9: 44% composition overlap. Significantly different materials serving different application areas.
20NiCrMo2-2 vs 33CrMoV12-9
Side-by-side chemical composition and mechanical property comparison.
Overview
20NiCrMo2-2
1.6523
Nickel-chromium-molybdenum case-hardening steel — the base grade of the 8620 family. Good weldability, toughness, and machinability. Case hardness up to HRC 60–63 with core strength 700–1100 MPa after carburizing and quenching. Used for gears, shafts, pinions, piston pins, and camshafts in automotive, gearbox, and general mechanical engineering. Equivalent to AISI 8620 and BS 805M20.
33CrMoV12-9
1.8522
Premium nitriding steel with high chromium content (2.8–3.3%) providing exceptional surface hardness after gas or plasma nitriding (up to 900 HV). Excellent core strength (900–1100 MPa tensile) with good toughness. Used for gears, crankshafts, cylinders, spindles, and precision machine components in aerospace, automotive, and power generation. Also known as 32CDV13 (AFNOR) and AMS 6481.
| 20NiCrMo2-2 | 33CrMoV12-9 | |
|---|---|---|
| Material Number | 1.6523 | 1.8522 |
| Category | Alloy Steel | Alloy Steel |
| Standard | EN 10084 | EN 10085 |
Chemical composition (wt%)
| Element | 20NiCrMo2-2 | 33CrMoV12-9 | Overlap |
|---|---|---|---|
| C | 0.17–0.23% | 0.29–0.36% | No overlap |
| Si | ≤ 0.4% | ≤ 0.4% | OK |
| Mn | 0.65–0.85% | 0.4–0.7% | Partial |
| P | ≤ 0.025% | ≤ 0.025% | OK |
Mechanical properties
| Property | 20NiCrMo2-2 | 33CrMoV12-9 | Unit |
|---|---|---|---|
| tensile_strength | 700–1100 | 900–1100 | MPa |
| yield_strength | ≥ 500 | ≥ 700 | MPa |
| elongation | ≥ 10 | ≥ 13 | % |
Compatibility Assessment
20NiCrMo2-2 and 33CrMoV12-9 have significantly different compositions (44% overlap). These materials are not interchangeable and serve different application areas.
Automated assessment based on composition analysis
Frequently Asked Questions
Is 20NiCrMo2-2 the same as 33CrMoV12-9?
20NiCrMo2-2 and 33CrMoV12-9 have a 44% composition overlap. They are generally not directly interchangeable.
Can I replace 20NiCrMo2-2 with 33CrMoV12-9?
Generally not recommended. The compositions differ significantly (44% overlap). These materials have different alloying concepts and are intended for different applications.
What is the difference between 20NiCrMo2-2 and 33CrMoV12-9?
The main differences are in the following elements: C, Mn, Cr, Mo. 20NiCrMo2-2 is a Alloy Steel grade, while 33CrMoV12-9 is a Alloy Steel grade.
View full data for each material:
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.