S700MC vs S690QL: Both 700 MPa class — completely different production routes
S700MC vs S690QL
Side-by-side chemical composition and mechanical property comparison.
Overview
S700MC
1.8974
The highest-strength grade in the EN 10149-2 HSLA series. 700 MPa yield with good cold formability. TMCP for ultra-fine grain structure. Used for telescopic cranes, truck frame rails, dirt-moving equipment, farm equipment, and any application requiring maximum weight reduction in cold-formed steel.
S690QL
1.8928
High-strength quenched and tempered fine-grain structural steel with minimum yield strength of 690 MPa. Used for heavily loaded structures like mobile cranes, mining equipment, bridges, and pressure vessels.
| S700MC | S690QL | |
|---|---|---|
| Material Number | 1.8974 | 1.8928 |
| Category | Carbon Steel | Carbon Steel |
| Standard | EN 10149-2 | EN 10025-6 |
Chemical composition (wt%)
| Element | S700MC | S690QL | Overlap |
|---|---|---|---|
| C | 0–0.12% | 0–0.2% | OK |
| Si | 0–0.6% | 0–0.8% | OK |
| Mn | 0–2.1% | 0–1.7% | OK |
| P | 0–0.025% | 0–0.02% | OK |
Mechanical properties
| Property | S700MC | S690QL | Unit |
|---|---|---|---|
| tensile_strength | 750–950 | 770–940 | MPa |
| yield_strength | ≥ 700 | ≥ 690 | MPa |
| elongation | ≥ 12 | ≥ 14 | % |
Compatibility Assessment
S700MC is TMCP (thermomechanically rolled) for cold forming; S690QL is QT (quench+tempered) for thick plates. S700MC has better formability; S690QL has better through-thickness properties in thick sections. Choose S700MC for cold-formed parts; S690QL for thick structural plates.
Frequently Asked Questions
Is S700MC the same as S690QL?
S700MC and S690QL have a 60% composition overlap. Both 700 MPa class — completely different production routes
Can I replace S700MC with S690QL?
Generally not recommended. The compositions differ significantly (60% overlap). These materials have different alloying concepts and are intended for different applications.
What is the difference between S700MC and S690QL?
The main differences are in the following elements: overall alloying content. S700MC is a Carbon Steel grade, while S690QL is a Carbon Steel grade.
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