10CrMo9-10 vs 13CrMo4-5: Same Cr-Mo boiler steel family — different service temperature
10CrMo9-10 vs 13CrMo4-5
Side-by-side chemical composition and mechanical property comparison.
Overview
10CrMo9-10
1.7380
Low-carbon Cr-Mo steel for elevated temperature pressure equipment. Excellent creep resistance up to 530°C. The standard grade for boiler tubes, headers, and pressure vessels in power generation and petrochemical industries.
13CrMo4-5
1.7335
Low-alloy Cr-Mo steel for elevated-temperature service. Good creep resistance up to 500°C. The standard grade for boiler tubes, headers, superheater tubes, and pressure equipment in power generation. Lower alloy content than 10CrMo9-10.
| 10CrMo9-10 | 13CrMo4-5 | |
|---|---|---|
| Material Number | 1.7380 | 1.7335 |
| Category | Alloy Steel | Alloy Steel |
| Standard | EN 10028-2 | EN 10028-2 |
Chemical composition (wt%)
| Element | 10CrMo9-10 | 13CrMo4-5 | Overlap |
|---|---|---|---|
| C | 0.08–0.14% | 0.1–0.17% | Partial |
| Si | 0–0.5% | 0–0.35% | OK |
| Mn | 0.4–0.8% | 0.4–1% | OK |
| P | 0–0.02% | 0–0.025% | OK |
Mechanical properties
| Property | 10CrMo9-10 | 13CrMo4-5 | Unit |
|---|---|---|---|
| tensile_strength | 450–600 | 440–590 | MPa |
| yield_strength | ≥ 280 | ≥ 290 | MPa |
| elongation | ≥ 18 | ≥ 20 | % |
Compatibility Assessment
10CrMo9-10 has higher Cr (2.0-2.5% vs 0.7-1.15%) and Mo (0.9-1.1% vs 0.4-0.6%) for service up to 530°C. 13CrMo4-5 is limited to ~500°C but more economical and easier to weld.
Frequently Asked Questions
Is 10CrMo9-10 the same as 13CrMo4-5?
10CrMo9-10 and 13CrMo4-5 have a 70% composition overlap. Same Cr-Mo boiler steel family — different service temperature
Can I replace 10CrMo9-10 with 13CrMo4-5?
In many cases, yes. The compositions overlap significantly (70%). However, always verify mechanical property requirements and heat treatment compatibility for your specific application.
What is the difference between 10CrMo9-10 and 13CrMo4-5?
The main differences are in the following elements: C, Cr, Mo. 10CrMo9-10 is a Alloy Steel grade, while 13CrMo4-5 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.