20NiCrMo2-2 vs EN-GJL-250: 11% composition overlap. Significantly different materials serving different application areas.
20NiCrMo2-2 vs EN-GJL-250
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.
EN-GJL-250
0.6025
Grey cast iron with lamellar graphite and minimum tensile strength 250 MPa. The most widely used grey cast iron grade worldwide. Predominantly pearlitic matrix providing an excellent balance of strength, machinability, damping capacity, and castability. Used for engine blocks, cylinder heads, machine tool beds, lathe beds, flywheels, brake discs, hydraulic valve bodies, and general medium-duty structural castings. Equivalent to DIN GG25 and ASTM A48 Class 35.
| 20NiCrMo2-2 | EN-GJL-250 | |
|---|---|---|
| Material Number | 1.6523 | 0.6025 |
| Category | Alloy Steel | Alloy Steel |
| Standard | EN 10084 | EN 1561 |
Chemical composition (wt%)
| Element | 20NiCrMo2-2 | EN-GJL-250 | Overlap |
|---|---|---|---|
| C | 0.17–0.23% | 2.8–3.3% | No overlap |
| Si | ≤ 0.4% | 1.2–1.7% | No overlap |
| Mn | 0.65–0.85% | 0.8–1.2% | Partial |
| P | ≤ 0.025% | ≤ 0.15% | OK |
Mechanical properties
| Property | 20NiCrMo2-2 | EN-GJL-250 | Unit |
|---|---|---|---|
| tensile_strength | 700–1100 | ≥ 250 | MPa |
| yield_strength | ≥ 500 | — | MPa |
| elongation | ≥ 10 | — | % |
Compatibility Assessment
20NiCrMo2-2 and EN-GJL-250 have significantly different compositions (11% 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 EN-GJL-250?
20NiCrMo2-2 and EN-GJL-250 have a 11% composition overlap. They are generally not directly interchangeable.
Can I replace 20NiCrMo2-2 with EN-GJL-250?
Generally not recommended. The compositions differ significantly (11% overlap). These materials have different alloying concepts and are intended for different applications.
What is the difference between 20NiCrMo2-2 and EN-GJL-250?
The main differences are in the following elements: C, Si, Mn. 20NiCrMo2-2 is a Alloy Steel grade, while EN-GJL-250 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.