Property class 10.9 / Equivalents
Is it really Property class 10.9? 1 “equivalents” checked
Cross-reference tables pair grades by name and history. Here each pairing is judged on the minimum values each standard guarantees, with the sources for both sides.
Same strength class; guaranteed values agree within a few MPa. Still check thickness bands and impact quality.
F3125 Grade A490ASTM
Same class of steel, but at least one guaranteed value is lower or tested differently. Recheck the design.
Commonly listed as an equivalent, but the guaranteed values do not support substitution.
Side by side
| Grade | Standard | Min. yield at 10 mm | Tensile at 10 mm | Match | What differs |
|---|---|---|---|---|---|
| Property class 10.9 |  ISO 898-1 | ≥ 940MPa1 | ≥ 1 040MPa1 | — | Reference grade. |
| F3125 Grade A490 | ASTM F3125/F3125M | ≥ 896MPa2 | 1 034–1 193MPa2 | Close match | 150–173 ksi (1034–1193 MPa) tensile, 130 ksi (896 MPa) yield; inch threads. |