ASTM A193 Grade B8T Mechanical Properties

High Tensile Carbon Steel Bolting

ASTM A193 Grade B8T Mechanical Properties

Find typical requirement for ASTM A193 Grade B8T Mechanical Properties for Metric and Imperial units. All intermediary or finished products manufactured to astm a193 grade b7 specification must comply to tensile strength, yield strength, elongation, reduction or area and hardness as per below requirement. This requirement is achieved by hardening AISI 4140 / 4142 alloy steel followed by tempering at temperatures specified below.

Mechanical Properties for Metric ASTM A193 Grade B8T

Tensile Class Diameter, Inch Tensile Strength,
min, ksi		 Yield Strength,
min, 0.2% offset,
ksi		 Elongation
in 4D,
min, %		 Reduction
of Area,
min, %		 Hardness,
max
Class 1A All Sizes 75 30 30 50 223 HBW or 96 HRB


Class 2B,C		 3/4 and under 125 100 12 35

321 HBW or 35 HRC
over 3/4 to 1 inclusive 115 80 15 35
over 1 to 1-1/4 inclusive 105 65 20 35
over 1-1/4 to 1-1/2 inclusive 100 50 28 50

A: Carbide Solution Treated
B: Carbide Solution Treated and Strain Hardened
C: For diameters 11⁄2 and over, center (core) properties may be lower than indicated by test reports which are based on values determined at 1⁄2 radius.