ASTM A193 Grade B16 Mechanical Properties

Quenched & Tempered Cr-Mo-V Alloy Steel

Mechanical Properties of ASTM A193 Grade B16 (Metric Bolts)

Diameter mm Min Tempering Temperature, °C Tensile Strength min, MPa Yield strength, min, 0.2% offset, MPa Elongation in 4D min, % Reduction of Area, min, % Hardness, max
M64 and Under 650 860 725 18 50 321 HBW or 35 HRC
over M64 to M100 650 760 655 17 45 321 HBW or 35 HRC
over M100 to M180 650 690 585 16 45 321 HBW or 35 HRC

Mechanical Properties for ASTM A193 Grade B16 (Inch Bolts)

Diameter Inch Min Tempering Temperature, °C Tensile Strength min, ksi Yield strength, min, 0.2% offset, ksi Elongation in 4D min, % Reduction of Area, min, % Hardness, max
2.5 and under 1200 125 105 18 50 321 HBW or 35 HRC
over 2.5 to 4 1200 110 95 17 45 321 HBW or 35 HRC
over 4 to 7 1200 100 85 16 45 321 HBW or 35 HRC

Hardness Requirement

Diameter mm Diameter Inch Hardness, max
M64 and Under 2.5 and under 321 HBW or 35 HRC
over M64 to M100 over 2.5 to 4
over M100 to M180 over 4 to 7