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MODIFIED AUSTENITIC STEEL FASTENERS
TECHNICAL ANALYSIS OF MODIFIED AUSTENITIC STEEL &
8.8 GRADE HI-TENSILE STEEL

 

Modified Austentic Stainless Steel

8.8 GRADE STEEL

Manufacturing

Cold forged

Cold forged & Heat treated

Material

Austenitic Stainless Steel

Steel (Medium Carbon)

Corrosion

Non Corrosive

Highly Corrosive

UTS (Kgf/mm2)

80 Kgf/m2m Min.

80 Kgf/m2m Min.

Hardness

20 HRC Min.

20-30 HRC

Elongation %

14% Min.

12% Min.

Strength Of Threads

Surface of Threads getting Hardened during cold working. Not distorting
during Torquing of nut.

De-Carborization is permitted and hence will show lower hardness and ultimate tensile strength shall show distorting during Torquing of nut.

Fatigue Life

Higher fatigue life due to higher hardness on the surface. Retaining properties at
higher temperatures.

Lower fatigue life due to de-carborization on surface.

Torque Values

Higher torques can be achieved

Will not be uniform.















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