Tensile Strength Comparison Chart

Tensile Strength is the maximum tension applied as loading that a fastener can support prior to (or coincidental with) its fracture.

Stainless steel fasteners can be made to different grades which relate to properties such as corrosion resistance and also different strength classes. These classes can be identified by their head markings such as on stainless steel bolts.

Imperial	Ibf/in2	MPa	Metric
		1200	Stainless Steel Class 120 (e.g. Bumax 129)
Stainless Steel Class 120		1200	Class 12.9 (AS1110 High Tensile Steel)
		1100
SAE Grade 8 (A5 2465 High Tensile Steel)	150000	1034	Class 10.9 (A5 1110 High Tensile Steel)
Stainless Steel Class 100		1000	Stainless Steel Class 100 (e.g. Bumax 109)
SAE Grade 5 (A5 2465 High Tensile Steel)	120000	900	Class 8.8 (A5 1110 High Tensile Steel)
SAE Grade 5 (A5 2465 High Tensile Steel)	120000	827	Class 8.8 (A5 1110 High Tensile Steel)
Stainless Steel Class 80 (e.g. 316-80, Bumax 88)	116000	800	Stainless Steel Class 80 (e.g. A4-80, Bumax 88, SS2507)
Stainless Steel Class 70 (e.g. 304-70, 316-70)	101000	700	Stainless Steel Class 70 (e.g. A2-70, A4-70)
		600	Class 5.8 (AS1110)
		550
		520
Stainless Steel Class 50 (e.g. No Markings)	72000	500	Stainless Steel Class 50 (e.g. No Markings)
BSW Mild Steel (A5 2451)	65000	450	Class 4.6 (AS1110) Mild Steel (AS1390)
	62000	427
	58015	400

100 PSI (Ibf/in² = 6.894Mpa)

1Mpa = 145.038 PSI (Ibf/in²⁾


Tensile Loads	Tightening Torques	What is Loading?	Yield Loads

Stainless Steel Bolts	Stainless Steel Nuts	Stainless Steel All Thread Rod	Stainless Steel Screws