Need Help 4140 standards
Need Help 4140 standards
(OP)
I have an enquiry to produce castings to the following specification. However, I am not familiar with NACE specification.
AISI 4140 L80 to meet NACE MR0175 – 18-22 HRC
I shall be thankful if someone can help me with it. Thanks once again





RE: Need Help 4140 standards
Looking at it from the 4140 standpoint you will be hard pressed to get 4140 into the required hardness range. The annealed hardness is too low and unless it is a large piece even tempering at 700°C will put you at or above the upper limits. The only way to get the hardness would be to normalize and temper and I don't know whether this is permitted by NACE. We used 4140 in this condition only a few times in not very highly stressed parts.
If this is a sour gas service there are a lot more steels that can readily meet this spec.
RE: Need Help 4140 standards
RE: Need Help 4140 standards
RE: Need Help 4140 standards
Regards,
Cory
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips Fora.
RE: Need Help 4140 standards
RE: Need Help 4140 standards
RE: Need Help 4140 standards