ASTM A36 vs S690Q: 52% composition overlap. Moderate differences, generally not direct substitutes.
ASTM A36 vs S690Q
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).
S690Q
1.8928
High-strength quenched and tempered structural steel — YS 690 MPa min. Part of EN 10025-6 series (S500Q to S960Q). Good weldability despite high strength (CEV controlled). Used for mobile cranes, mining equipment, truck chassis, bridge components, and any structure where weight reduction through higher strength is critical. "Q" = quenched, "L" variants add low-temp impact.
| ASTM A36 | S690Q | |
|---|---|---|
| Material Number | K02600 | 1.8928 |
| Category | Carbon Steel | Carbon Steel |
| Standard | ASTM A36/A36M | EN 10025-6 |
Chemical composition (wt%)
| Element | ASTM A36 | S690Q | Overlap |
|---|---|---|---|
| C | 0–0.26% | 0–0.2% | OK |
| Si | 0–0.4% | 0–0.8% | OK |
| Mn | 0–1.03% | 0–1.7% | OK |
| P | 0–0.04% | 0–0.02% | OK |
Mechanical properties
| Property | ASTM A36 | S690Q | Unit |
|---|---|---|---|
| tensile_strength | 400–550 | 770–940 | MPa |
| yield_strength | ≥ 250 | ≥ 690 | MPa |
| elongation | ≥ 20 | ≥ 14 | % |
Compatibility Assessment
ASTM A36 and S690Q 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 A36 the same as S690Q?
ASTM A36 and S690Q have a 52% composition overlap. They are generally not directly interchangeable.
Can I replace ASTM A36 with S690Q?
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 A36 and S690Q?
The main differences are in the following elements: overall alloying content. ASTM A36 is a Carbon Steel grade, while S690Q is a Carbon Steel grade.
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Data provided for reference only. Always verify against the applicable specification for critical applications.
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