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Way to minimize Temper Embrittlement is to limit the “J” factor for base metal and the “X” factor
for weld metal, based on material composition as follows:
J=(Mn + Si)(P + Sn) x104 (in wt %), has been applied to parent steels and weld metals.
X=(10P + 5Sb + 4Sn + As)/100 (in ppm), is applied to weld metals.
If J is less than or equal to 180, or if X is less than 20, the risk of temper embrittlement is considered to be low.