ASTM A572 Grade 50 vs S235JR: 98% composition overlap. Very similar materials, likely interchangeable for most applications.
ASTM A572 Grade 50 vs S235JR
Side-by-side chemical composition and mechanical property comparison.
Overview
ASTM A572 Grade 50
The most widely used structural steel grade in the United States. 345 MPa (50 ksi) yield strength HSLA steel. Has largely replaced A36 for structural applications due to higher strength-to-weight ratio. Used for building frames, bridges, heavy equipment, and general structural fabrication.
S235JR
1.0038
General-purpose structural steel with minimum yield strength of 235 MPa. The most common structural steel grade in Europe for general construction, frames, and non-critical structural applications.
| ASTM A572 Grade 50 | S235JR | |
|---|---|---|
| Material Number | — | 1.0038 |
| Category | Carbon Steel | Carbon Steel |
| Standard | ASTM A572 | EN 10025-2 |
Chemical composition (wt%)
| Element | ASTM A572 Grade 50 | S235JR | Overlap |
|---|---|---|---|
| C | 0–0.23% | 0–0.17% | OK |
| Si | 0–0.4% | 0–0.4% | OK |
| Mn | 0–1.35% | 0–1.4% | OK |
| P | 0–0.04% | 0–0.035% | OK |
Mechanical properties
| Property | ASTM A572 Grade 50 | S235JR | Unit |
|---|---|---|---|
| tensile_strength | ≥ 450 | 360–510 | MPa |
| yield_strength | ≥ 345 | ≥ 235 | MPa |
| elongation | ≥ 18 | ≥ 26 | % |
Compatibility Assessment
ASTM A572 Grade 50 and S235JR have very similar compositions (98% overlap) and are likely interchangeable for most applications. Verify mechanical properties for your specific use case.
Automated assessment based on composition analysis
Frequently Asked Questions
Is ASTM A572 Grade 50 the same as S235JR?
ASTM A572 Grade 50 and S235JR have a 98% composition overlap. For most purposes, they can be considered similar.
Can I replace ASTM A572 Grade 50 with S235JR?
In many cases, yes. The compositions overlap significantly (98%). However, always verify mechanical property requirements and heat treatment compatibility for your specific application.
What is the difference between ASTM A572 Grade 50 and S235JR?
The main differences are in the following elements: overall alloying content. ASTM A572 Grade 50 is a Carbon Steel grade, while S235JR is a Carbon 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.