Property class 8.8 / Equivalents
Is it really Property class 8.8? 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 A325ASTM
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 8.8 |  ISO 898-1 | ≥ 640MPa1 | ≥ 800MPa1 | — | Reference grade. |
| F3125 Grade A325 | ASTM F3125/F3125M | ≥ 634MPa2 | ≥ 827MPa2 | Close match | 120 ksi (827 MPa) tensile and 92 ksi (634 MPa) yield, close to 8.8 above 16 mm; inch threads. |