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a4-70 2

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NBROWN

NBROWN

Mechanical
Joined
Apr 15, 2003
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we are need to know what type of material A4-70 is on hex head bolts. The only information I can come across is iso 4014/4017 and spec A4-70 but do not have the documents to define each spec.
 
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A4-70 is a designation that appears in ISO 3606-1. The material is a cold-formed austenitic stainless steel with a composition nominally equivalent to Type 316.
 
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The A4 designation refers to the chemistry, the '70' part indicates a UTS (Rm) of 700MPa, which indicates a certain degree of cold work. A4-70 is a common material for small size fasteners used in satellite, electronics and (providing there is no requirement to be amagnetic) avionics.
 
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