ASTM A572 Grade 50 vs C22E: 52% composition overlap. Moderate differences, generally not direct substitutes.
ASTM A572 Grade 50 vs C22E
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.
C22E
1.1151
Low-carbon unalloyed steel for case hardening and general engineering — 0.17-0.24% C. After carburizing: surface HRC 55-60, soft tough core. Much cheaper than alloy case-hardening steels (16MnCr5, 20MnCr5). Modern designation for Ck22. Used for pins, bolts, levers, lightly loaded gears, and any carburized part where alloy additions are not justified. Also used as cold-heading wire.
| ASTM A572 Grade 50 | C22E | |
|---|---|---|
| Material Number | — | 1.1151 |
| Category | Carbon Steel | Carbon Steel |
| Standard | ASTM A572 | EN 10083-2 |
Chemical composition (wt%)
| Element | ASTM A572 Grade 50 | C22E | Overlap |
|---|---|---|---|
| C | 0–0.23% | 0.17–0.24% | Partial |
| Si | 0–0.4% | 0–0.4% | OK |
| Mn | 0–1.35% | 0.4–0.7% | OK |
| P | 0–0.04% | 0–0.025% | OK |
Mechanical properties
| Property | ASTM A572 Grade 50 | C22E | Unit |
|---|---|---|---|
| tensile_strength | ≥ 450 | 410–540 | MPa |
| yield_strength | ≥ 345 | 240–280 | MPa |
| elongation | ≥ 18 | 22–28 | % |
Compatibility Assessment
ASTM A572 Grade 50 and C22E have moderate differences (52% overlap). They are generally not direct substitutes. Consider the specific requirements of your application.
Automated assessment based on composition analysis
Frequently Asked Questions
Is ASTM A572 Grade 50 the same as C22E?
ASTM A572 Grade 50 and C22E have a 52% composition overlap. They are generally not directly interchangeable.
Can I replace ASTM A572 Grade 50 with C22E?
Generally not recommended. The compositions differ significantly (52% overlap). These materials have different alloying concepts and are intended for different applications.
What is the difference between ASTM A572 Grade 50 and C22E?
The main differences are in the following elements: C. ASTM A572 Grade 50 is a Carbon Steel grade, while C22E is a Carbon Steel grade.
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