ASTM A732 Grade 7Q Cast Steel

Alloy Steels

Overview Chemical Composition Mechanical Properties Physical Properties Other Properties

Property Overview

Density7.8g/cm³

Elastic Modulus190GPa

Tensile Strength1170MPa

Yield Strength890MPa

Brinell Hardness350HB

Maximum Service Temperature420°C

Weight Calculator

Chemical Composition

0.25 to 0.35%

0.8 to 1.1%

0.15 to 0.25%

0.4 to 0.7%

0.2 to 0.8%

0 to 0.040%

0 to 0.045%

0 to 0.5%

0 to 0.1%

96.1 to 98.2%

Mechanical

Elastic (Young's, Tensile) Modulus

190 GPa

Elongation at Break

7.0 %

Fatigue Strength

520 MPa

Poisson's Ratio

0.29

Shear Modulus

73 GPa

Tensile Strength: Ultimate (UTS)

1170 MPa

Tensile Strength: Yield (Proof)

890 MPa

Hardness

Brinell Hardness

350

Physical

Density

7.8 g/cm 3

Thermal

Latent Heat of Fusion

260 J/g

Maximum Temperature: Mechanical

420 °C

Melting Completion (Liquidus)

1460 °C

Melting Onset (Solidus)

1420 °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

35 points

Electrical

Electrical Conductivity: Equal Volume

7.4 % IACS

Electrical Conductivity: Equal Weight (Specific)

8.5 % IACS

Calculated

Resilience: Ultimate (Unit Rupture Work)

76 MJ/m 3

Resilience: Unit (Modulus of Resilience)

2100 kJ/m 3

Stiffness to Weight: Axial

13 points

Stiffness to Weight: Bending

24 points

Strength to Weight: Axial

42 points

Strength to Weight: Bending

32 points

Environmental

Base Metal Price

2.6 % relative

Embodied Carbon

1.5 kg CO 2 /kg material

Embodied Energy

20 MJ/kg

Embodied Energy

20 MJ/kg 8.6 x 10 3 BTU/lb

Embodied Water

51 L/kg

Embodied Water

51 L/kg 6.1 gal/lb

Registered Designations & Aliases

ASTM A732 Grade 7Q 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