ASTM A36 vs C75S: 38% composition overlap. Significantly different materials serving different application areas.
ASTM A36 vs C75S
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).
C75S
1.1248
High-carbon spring strip steel — C 0.70-0.80%. Between C67S (0.65-0.72%) and C85S (0.83-0.90%). Good fatigue strength and edge retention. Used for flat springs, leaf springs, saw blades, snap rings, and reed valves. Available as cold-rolled precision strip in hardened & tempered condition (HRC 58-62).
| ASTM A36 | C75S | |
|---|---|---|
| Material Number | K02600 | 1.1248 |
| Category | Carbon Steel | Carbon Steel |
| Standard | ASTM A36/A36M | EN 10132-4 |
Chemical composition (wt%)
| Element | ASTM A36 | C75S | Overlap |
|---|---|---|---|
| C | 0–0.26% | 0.7–0.8% | No overlap |
| Si | 0–0.4% | 0.15–0.35% | OK |
| Mn | 0–1.03% | 0.6–0.9% | OK |
| P | 0–0.04% | 0–0.025% | OK |
Mechanical properties
| Property | ASTM A36 | C75S | Unit |
|---|---|---|---|
| tensile_strength | 400–550 | 1250–1500 | MPa |
| yield_strength | ≥ 250 | 1100–1350 | MPa |
| elongation | ≥ 20 | 4–7 | % |
Compatibility Assessment
ASTM A36 and C75S have significantly different compositions (38% overlap). These materials are not interchangeable and serve different application areas.
Automated assessment based on composition analysis
Frequently Asked Questions
Is ASTM A36 the same as C75S?
ASTM A36 and C75S have a 38% composition overlap. They are generally not directly interchangeable.
Can I replace ASTM A36 with C75S?
Generally not recommended. The compositions differ significantly (38% overlap). These materials have different alloying concepts and are intended for different applications.
What is the difference between ASTM A36 and C75S?
The main differences are in the following elements: C. ASTM A36 is a Carbon Steel grade, while C75S 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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