ASTM A36 vs C45: 66% composition overlap. Moderate differences, generally not direct substitutes.
ASTM A36 vs C45
Side-by-side chemical composition and mechanical property comparison.
Overview
ASTM A36
K02600
The most common structural carbon steel in the US. Low carbon content with good weldability and machinability. Used for buildings, bridges, construction equipment, and general structural purposes. Minimum yield strength 36 ksi (250 MPa).
C45
1.0503
Medium carbon unalloyed quality steel. Good machinability and moderate strength after heat treatment. Widely used for shafts, spindles, pins, studs, and general machine parts.
| ASTM A36 | C45 | |
|---|---|---|
| Material Number | K02600 | 1.0503 |
| Category | Carbon Steel | Carbon Steel |
| Standard | ASTM A36/A36M | EN 10083-2 |
Chemical composition (wt%)
| Element | ASTM A36 | C45 | Overlap |
|---|---|---|---|
| C | 0–0.26% | 0.42–0.5% | No overlap |
| Si | 0–0.4% | 0–0.4% | OK |
| Mn | 0–1.03% | 0.5–0.8% | OK |
| P | 0–0.04% | 0–0.03% | OK |
Mechanical properties
| Property | ASTM A36 | C45 | Unit |
|---|---|---|---|
| tensile_strength | 400–550 | 630–780 | MPa |
| yield_strength | ≥ 250 | ≥ 370 | MPa |
| elongation | ≥ 20 | ≥ 16 | % |
Compatibility Assessment
ASTM A36 and C45 have moderate differences (66% 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 A36 the same as C45?
ASTM A36 and C45 have a 66% composition overlap. They are generally not directly interchangeable.
Can I replace ASTM A36 with C45?
Generally not recommended. The compositions differ significantly (66% overlap). These materials have different alloying concepts and are intended for different applications.
What is the difference between ASTM A36 and C45?
The main differences are in the following elements: C. ASTM A36 is a Carbon Steel grade, while C45 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.
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.