30NiCrMo16-6 vs EN-GJL-250: 8% composition overlap. Significantly different materials serving different application areas.
30NiCrMo16-6 vs EN-GJL-250
Side-by-side chemical composition and mechanical property comparison.
Overview
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.
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.
| 30NiCrMo16-6 | EN-GJL-250 | |
|---|---|---|
| Material Number | 1.6747 | 0.6025 |
| Category | Alloy Steel | Alloy Steel |
| Standard | EN 10083-3 | EN 1561 |
Chemical composition (wt%)
| Element | 30NiCrMo16-6 | EN-GJL-250 | Overlap |
|---|---|---|---|
| C | 0.26–0.33% | 2.8–3.3% | No overlap |
| Si | ≤ 0.4% | 1.2–1.7% | No overlap |
| Mn | 0.5–0.8% | 0.8–1.2% | Partial |
| P | ≤ 0.025% | ≤ 0.15% | OK |
Mechanical properties
| Property | 30NiCrMo16-6 | EN-GJL-250 | Unit |
|---|---|---|---|
| tensile_strength | 1080–1270 | ≥ 250 | MPa |
| yield_strength | ≥ 880 | — | MPa |
| elongation | ≥ 10 | — | % |
Compatibility Assessment
30NiCrMo16-6 and EN-GJL-250 have significantly different compositions (8% overlap). These materials are not interchangeable and serve different application areas.
Automated assessment based on composition analysis
Frequently Asked Questions
Is 30NiCrMo16-6 the same as EN-GJL-250?
30NiCrMo16-6 and EN-GJL-250 have a 8% composition overlap. They are generally not directly interchangeable.
Can I replace 30NiCrMo16-6 with EN-GJL-250?
Generally not recommended. The compositions differ significantly (8% overlap). These materials have different alloying concepts and are intended for different applications.
What is the difference between 30NiCrMo16-6 and EN-GJL-250?
The main differences are in the following elements: C, Si, Mn. 30NiCrMo16-6 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.