ASTM A732 Grade 8Q Cast Steel

Alloy Steels

Overview Chemical Composition Mechanical Properties Physical Properties Other Properties

Property Overview

Density7.8g/cm³

Elastic Modulus190GPa

Tensile Strength1390MPa

Yield Strength1140MPa

Brinell Hardness420HB

Maximum Service Temperature420°C

Weight Calculator

Chemical Composition

0.35 to 0.45%

0.8 to 1.1%

0 to 0.5%

0.15 to 0.25%

0.7 to 1.0%

0.2 to 0.8%

0 to 0.040%

0 to 0.045%

0 to 0.5%

0 to 0.1%

95.2 to 97.8%

Mechanical

Elastic (Young's, Tensile) Modulus

190 GPa

Elongation at Break

5.0 %

Fatigue Strength

650 MPa

Poisson's Ratio

0.29

Shear Modulus

73 GPa

Tensile Strength: Ultimate (UTS)

1390 MPa

Tensile Strength: Yield (Proof)

1140 MPa

Hardness

Brinell Hardness

420

Physical

Density

7.8 g/cm 3

Thermal

Latent Heat of Fusion

260 J/g

Maximum Temperature: Mechanical

420 °C

Melting Completion (Liquidus)

1450 °C

Melting Onset (Solidus)

1410 °C

Specific Heat Capacity

470 J/kg-K

Thermal Conductivity

43 W/m-K

Thermal Diffusivity

12 mm 2 /s

Thermal Expansion

13 µm/m-K

Thermal Shock Resistance

41 points

Electrical

Electrical Conductivity: Equal Volume

7.5 % IACS

Electrical Conductivity: Equal Weight (Specific)

8.7 % IACS

Calculated

Resilience: Ultimate (Unit Rupture Work)

65 MJ/m 3

Resilience: Unit (Modulus of Resilience)

3470 kJ/m 3

Stiffness to Weight: Axial

13 points

Stiffness to Weight: Bending

24 points

Strength to Weight: Axial

49 points

Strength to Weight: Bending

35 points

Environmental

Base Metal Price

2.8 % relative

Embodied Carbon

1.5 kg CO 2 /kg material

Embodied Energy

21 MJ/kg

Embodied Energy

21 MJ/kg 8.8 x 10 3 BTU/lb

Embodied Water

52 L/kg

Embodied Water

52 L/kg 6.2 gal/lb

Registered Designations & Aliases

ASTM A732 Grade 8Q Cast Steel

Standards

ASTM A732 ASTM A732: Standard Specification for Castings, Investment, Carbon and Low Alloy Steel for General Application, and Cobalt Alloy for High Strength at Elevated Temperatures

ASTM A732 ASTM A732: Standard Specification for Castings, Investment, Carbon and Low Alloy Steel for General Application, and Cobalt Alloy for High Strength at Elevated Temperatures Manufacture and Uses of Alloy Steels, Henry D. Hibbard, 2005