S690Q
1.8928High-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.
International equivalents
| Flag | Standard | Country | Grade | Number | Match |
|---|---|---|---|---|---|
| 🇺🇸 | ASTM | USA | ASTM A514 / A517 (approximate) | — | REF |
| 🇪🇺 | EN | Europe | S690Q / 1.8928 | 1.8928 | 100% |
Sources: ASTM A514, EN 10025-6
Chemical composition comparison (wt%)
Side-by-side: S690Q (EN) (EN 10025-6) vs S690Q / 1.8928 (EN) (EN 10025-6)
| Element | S690Q (EN) | S690Q / 1.8928 (EN) | Overlap |
|---|---|---|---|
| C | 0–0.2% | 0–0.2% | OK |
| Si | 0–0.8% | 0–0.8% | OK |
| Mn | 0–1.7% | 0–1.7% | OK |
| P | 0–0.02% | 0–0.02% | OK |
| S | 0–0.01% | 0–0.01% | OK |
| Cr | 0–1.5% | 0–1.5% | OK |
| Mo | 0–0.7% | 0–0.7% | OK |
| Ni | 0–2% | 0–2% | OK |
| B | 0–0.005% | 0–0.005% | OK |
Mechanical properties
QT
| Property | Value | Unit |
|---|---|---|
| Tensile Strength | 770–940 | MPa |
| Yield Strength | ≥ 690 | MPa |
| Elongation | ≥ 14 | % |
| Elastic Modulus | ≥ 210 | GPa |
| Density | ≥ 7.85 | g/cm3 |
Compatibility verdict
S690Q and S690Q / 1.8928: 100% composition match
Close equivalents but NOT identical.
Related materials
S355JR
1.0045High-strength low-alloy structural steel with minimum yield strength of 355 MPa. Standard grade for bridges, buildings, cranes, and general structural applications. Impact tested at +20°C (JR).
S690QL
1.8928High-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.
S275JR
1.0044Medium-strength structural steel with minimum yield strength of 275 MPa. Bridges the gap between S235JR and S355JR. Used for general structural applications, lattice towers, masts, and light crane components. Impact tested at +20°C (JR).
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