Grade 10.9 bolt
Grade 10.9 bolt
(OP)
I have a small screw machine shop where I make spacers and bolts from 12l14 steel. I have a customer who wants a 10mm bolt made which must be equivalant to a grade 10.9
What material should I use and what process needs to be done after it is made to bring it to a grade 10.9?
What material should I use and what process needs to be done after it is made to bring it to a grade 10.9?





RE: Grade 10.9 bolt
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Hope this helps.
RE: Grade 10.9 bolt
If you need a screw machining material with ultimate tensile strength near 1000 MPa, then Stressproof and "e.t.d." 150 from Niagra are popular:
http://www.niagaralasalle.com/products/index.html
Just be aware that these don't necessarily meet all the requirements of ISO 898-1.
Regards,
Cory
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips Fora.
RE: Grade 10.9 bolt
RE: Grade 10.9 bolt
This website will surely help. Go to Section "s".
By the way, for 10.9 class fastener, black oxide finishing is recommended, zinc plating will promote the risk of hydrogen embrittlement.
Good luck to you.
Best regards,
ct
RE: Grade 10.9 bolt
Tread carefully and follow the advice of the other posters. Get and read a copy of the referenced ISO standard to know what you're getting into...
RE: Grade 10.9 bolt
1541 manganese grade is allowed up to M12 size.
Where material costs are an issue, Boron steels like 10B30 are increasing in usage (Europe) but be careful of the hardenability and heat treat practice. This material requires customer approval.
RE: Grade 10.9 bolt
I note that ISO 898-1 limits the boron content of material used to fabricate property class 10.9 fasteners to .003% (.005% provided that "non-effective boron is controlled by addition of titanium and/or aluminum").
RE: Grade 10.9 bolt
Regards,
Cory
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips Fora.