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A4-80 is a high-tensile stainless steel that is in common use in the Petro-chemical, Oil & Gas and Offshore Industries. It has great mechanical strength in addition to good resistance to corrosion. Higher mechanical strength as compared to standard A4 / 316 is achieved through the cold-drawing process, providing a minimum Ultimate Tensile Strength of 800 MPa.


At Bolt King, we are adept at manufacturing A4-80 fasteners, and are able to hot-forge A4-80 bolts and nuts on-site. By using cold-worked raw material with tensile strengths in excess of 1000 MPa, we can retain the A4-80 properties even after the forging process.  Our current range for hot-forging these products is M6 - M48.

If you have any questions or queries with regard to A4-80 bolting, please contact us.

Chemical Properties




- - - - - 16.0 10.5 2.0 - - - -
Max 0.08 2.0 0.03 0.045 1.0 18.5 14.0 3.0 - - - Bal

Mechanical Properties

Ultimate Tensile Strength (Min)Yield Strength  (Min)Elongation  (Min)RoA (Min)Hardness
800 MPa 600 MPa 30 - -

The information provided above is for reference only. Please contact us for further information.

Special Fasteners In Exotic Alloys, Including
Inconel & Super Duplex