stainless-steel-a4ISO 3506
A4-80 Stainless (316)
High strength marine stainless.
Tensile Rm800 MPa
Yield Rp0.2600 MPa
Hardness—
Nut classA4-80
Mechanical properties
- Property class
- A4-80 Stainless (316)
- Defined in
- ISO 3506
- Tensile strength Rm (min)
- 800 MPa
- Yield strength Rp0.2 (min)
- 600 MPa
- Hardness
- —
- Matching nut class
- A4-80
- Material
- Stainless Steel A4 (316)
Where this grade is used
Property classes are stamped on the head of bolts and screws above 5 mm diameter. A A4-80 Stainless (316) fastener is specified where the joint needs a proof load of roughly 540 MPa or less. Always match the bolt class with a nut of class A4-80 or higher so the bolt fails before the thread strips.