BS 970-4:1970
Withdrawn
Date published:
Specification for wrought steels for mechanical and allied engineering purposes, Valve steels
General requirements: information to be supplied by purchaser, product analysis and permitted variations, condition of material on delivery, hardness testing, etc. En steels replaced. Chemical composition, condition of supply, approval test and heat treatment of individual valve steels. Summary tables.
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BS 970-4:1970
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