S690QL vs ASTM A514
These two grades are listed as equivalents of each other: their chemistry windows overlap and they serve the same applications. They are not always identical — check the differences below before substituting, especially in certified designs.
S690QL
Structural & HSLA Steel
S690QL is the EN 10025-6 quenched-and-tempered structural steel with 690 MPa minimum yield — the grade behind weight-critical crane booms, mining equipment and mobile machinery in Europe. Its low-temperature toughness (−40 °C) matches the strength, unlike cheaper Q&T plates.
Standards: DIN 1.8928 (S690QL) · AISI A514 (near) · GB Q690D (near)
ASTM A514
Structural & HSLA Steel
ASTM A514 is the American 100 ksi yield Q&T alloy plate, used where section weight must come down without giving up strength. Each of its letter grades is a different alloy system engineered for weldable high strength in thick plate.
Standards: DIN S690QL (near) · AISI A514 · GB Q690D (near)
Chemical composition compared (%)
| Element | S690QL | ASTM A514 |
|---|---|---|
| C | ≤0.20 | 0.12–0.21 (Gr.B) |
| Si | ≤0.80 | 0.20–0.35 (Gr.B) |
| Mn | ≤1.70 | 0.70–1.00 (Gr.B) |
| P | ≤0.020 | — |
| S | ≤0.010 | — |
| Cr | ≤1.50 | 0.40–0.65 (Gr.B) |
| Ni | ≤2.00 | — |
| Mo | ≤0.70 | 0.15–0.25 (Gr.B) |
| B | ≤0.005 | 0.0005–0.005 (Gr.B) |
| V | — | 0.03–0.08 (Gr.B) |
Properties compared
| Property | S690QL | ASTM A514 |
|---|---|---|
| Yield strength | ≥690 MPa (≤50 mm) | ≥690 MPa |
| Tensile strength | 770–940 MPa | 760–895 MPa (≤65 mm) |
| Impact | QL: 27 J at −40 °C | — |
| Density | 7.85 g/cm³ | 7.85 g/cm³ |
Sourcing either grade?
Nasteel stocks both families from Shenzhen with EN 10204 3.1 mill certificates by heat number.
Ask for a quotationSee full data sheets: S690QL · ASTM A514. Substitution decisions for certified parts stay with the design authority.