S960Q
1.8941Ultra-high-strength quenched structural steel — YS 960 MPa min. Near the top of EN 10025-6 range. Approaches tool-steel-level strength while remaining weldable (with strict preheat/interpass control). Used for the most weight-critical structural applications: mobile crane booms, mining equipment, military vehicles, and specialty trailer chassis. Significantly reduces section thickness vs S355.
International equivalents
| Flag | Standard | Country | Grade | Number | Match |
|---|---|---|---|---|---|
| 🇪🇺 | EN | Europe | S960Q / 1.8941 | 1.8941 | 100% |
Sources: EN 10025-6
Chemical composition comparison (wt%)
Side-by-side: S960Q (EN) (EN 10025-6) vs S960Q / 1.8941 (EN) (EN 10025-6)
| Element | S960Q (EN) | S960Q / 1.8941 (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 | 980–1150 | MPa |
| Yield Strength | ≥ 960 | MPa |
| Elongation | ≥ 10 | % |
| Elastic Modulus | ≥ 210 | GPa |
| Density | ≥ 7.85 | g/cm3 |
Compatibility verdict
S960Q and S960Q / 1.8941: 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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