Nut Steel ISO898
Nut Steel ISO898
(OP)
What are the differences between ISO 898-1 grade 8.8 bolt steel and ISO 898-2 grade 8 nut steel?
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RE: Nut Steel ISO898
C = 0.25-0.55
P = 0.035 max
S = 0.035 max
B = 0.003 max
The C range is allowed to be 0.15-0.40 if alloying elements such as Mn, B, or Cr are used. The minimum tempering temperature is 425 C.
For 898-2, Property Class 8, the allowable composition is as follows:
C = 0.58 max
Mn = 0.25 min
P = 0.060 max
S = 0.150 max
For sizes below M16, the nuts do not need to be quenched and tempered.