Hardness Guide For 300 Series Stainless (Approximate)

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TEMPER ROCKWELL TENSILE   TEMPER ROCKWELL TENSILE
ANNEALED RB 85 MAX 110,000 PX   3/4 HARD RC 35-40 175,000 MIN
1/4 HARD RC 25-30 125,000 MIN   FULL HARD RC 40 MIN 185,000 MIN
1/2 HARD RC 30-35 150,000 MIN   EX FULL HD RC 45-50 200,000 MIN

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