20NiCrMo2-2 vs 30NiCrMo16-6: 39% composition overlap. Significantly different materials serving different application areas.
20NiCrMo2-2 vs 30NiCrMo16-6
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.
30NiCrMo16-6
1.6747
Ultra-high-strength nickel-chromium-molybdenum steel with outstanding through-hardenability for large cross-sections. Achieves tensile strengths of 1080–1270 MPa (dia ≤40mm) with excellent impact toughness. Very high Jominy hardenability (47–55 HRC). Used for heavy-duty crankshafts, connecting rods, bolts, gear shafts, and critical aerospace structural parts. AFNOR equivalent: 35NCD16.
| 20NiCrMo2-2 | 30NiCrMo16-6 | |
|---|---|---|
| Material Number | 1.6523 | 1.6747 |
| Category | Alloy Steel | Alloy Steel |
| Standard | EN 10084 | EN 10083-3 |
Chemical composition (wt%)
| Element | 20NiCrMo2-2 | 30NiCrMo16-6 | Overlap |
|---|---|---|---|
| C | 0.17–0.23% | 0.26–0.33% | No overlap |
| Si | ≤ 0.4% | ≤ 0.4% | OK |
| Mn | 0.65–0.85% | 0.5–0.8% | Partial |
| P | ≤ 0.025% | ≤ 0.025% | OK |
Mechanical properties
| Property | 20NiCrMo2-2 | 30NiCrMo16-6 | Unit |
|---|---|---|---|
| tensile_strength | 700–1100 | 1080–1270 | MPa |
| yield_strength | ≥ 500 | ≥ 880 | MPa |
| elongation | ≥ 10 | ≥ 10 | % |
Compatibility Assessment
20NiCrMo2-2 and 30NiCrMo16-6 have significantly different compositions (39% 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 30NiCrMo16-6?
20NiCrMo2-2 and 30NiCrMo16-6 have a 39% composition overlap. They are generally not directly interchangeable.
Can I replace 20NiCrMo2-2 with 30NiCrMo16-6?
Generally not recommended. The compositions differ significantly (39% overlap). These materials have different alloying concepts and are intended for different applications.
What is the difference between 20NiCrMo2-2 and 30NiCrMo16-6?
The main differences are in the following elements: C, Mn, Cr, Mo. 20NiCrMo2-2 is a Alloy Steel grade, while 30NiCrMo16-6 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.