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Yield Strength

API Grade Yield Strength - Minimum PSI Yield Strength - Maximum PSI Tensile Strength - Minimum PSI Rockwell C Hardness (est.)
H-40 40,000 80,000  60,000 0-15
J-55 55,000 80,000  75,000 0-15
K-55 55,000 80,000 95,000 14-25
C-75 75,000 90,000 95,000 14-26
L-80 80,000 95,000 95,000 14-23
N-80 80,000 110,000 100,000 16-25
S-95 95,000 110,000 110,000 22-31
P-110 110,000 140,000 125,000 27-35
Q-125 125,000 150,000 135,000 30-38