ASTM A572 Grade 50 vs C50E: 47% composition overlap. Significantly different materials serving different application areas.
ASTM A572 Grade 50 vs C50E
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.
C50E
1.1206
High-carbon unalloyed Q&T steel — 0.47-0.55% C. Higher strength than C45E at the expense of reduced weldability and toughness. Modern designation for Ck50. Suitable for induction hardening to HRC 55-60. Used for heavy-duty shafts, rail wheels, clutch plates, and springs where maximum unalloyed strength is needed. Also used for agricultural equipment and wear parts.
| ASTM A572 Grade 50 | C50E | |
|---|---|---|
| Material Number | — | 1.1206 |
| Category | Carbon Steel | Carbon Steel |
| Standard | ASTM A572 | EN 10083-2 |
Chemical composition (wt%)
| Element | ASTM A572 Grade 50 | C50E | Overlap |
|---|---|---|---|
| C | 0–0.23% | 0.47–0.55% | No overlap |
| Si | 0–0.4% | 0–0.4% | OK |
| Mn | 0–1.35% | 0.6–0.9% | OK |
| P | 0–0.04% | 0–0.025% | OK |
Mechanical properties
| Property | ASTM A572 Grade 50 | C50E | Unit |
|---|---|---|---|
| tensile_strength | ≥ 450 | 750–900 | MPa |
| yield_strength | ≥ 345 | 490–580 | MPa |
| elongation | ≥ 18 | 13–17 | % |
Compatibility Assessment
ASTM A572 Grade 50 and C50E have significantly different compositions (47% overlap). These materials are not interchangeable and serve different application areas.
Automated assessment based on composition analysis
Frequently Asked Questions
Is ASTM A572 Grade 50 the same as C50E?
ASTM A572 Grade 50 and C50E have a 47% composition overlap. They are generally not directly interchangeable.
Can I replace ASTM A572 Grade 50 with C50E?
Generally not recommended. The compositions differ significantly (47% overlap). These materials have different alloying concepts and are intended for different applications.
What is the difference between ASTM A572 Grade 50 and C50E?
The main differences are in the following elements: C. ASTM A572 Grade 50 is a Carbon Steel grade, while C50E is a Carbon Steel grade.
Related Comparisons
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Data provided for reference only. Always verify against the applicable specification for critical applications.
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