Menu (ESC)

ASTM A148 Grade 165-150 or 1140-1035 (D51500) Cast Steel

ASTM A148 grade 165-150 is a type of ASTM A148 cast steel. Cited properties are appropriate for the quenched and tempered condition. ASTM A148 Grade 165-150 is the ASTM designation for this material. D51500 is the UNS number.

It has the highest strength and lowest ductility compared to the other variants of ASTM A148 cast steel.

The graph bars on the material properties cards below compare ASTM A148 grade 165-150 to: cast alloy steels (top), all iron alloys (middle), and the entire database (bottom). A full bar means this is the highest value in the relevant set. A half-full bar means it's 50% of the highest, and so on.

Mechanical Properties

Brinell Hardness


Elastic (Young's, Tensile) Modulus

190 GPa 27 x 106 psi

Elongation at Break

5.7 %

Fatigue Strength

670 MPa 97 x 103 psi

Poisson's Ratio


Reduction in Area

22 %

Shear Modulus

73 GPa 11 x 106 psi

Tensile Strength: Ultimate (UTS)

1300 MPa 190 x 103 psi

Tensile Strength: Yield (Proof)

1160 MPa 170 x 103 psi

Thermal Properties

Latent Heat of Fusion

250 J/g

Maximum Temperature: Mechanical

430 °C 800 °F

Melting Completion (Liquidus)

1460 °C 2660 °F

Melting Onset (Solidus)

1420 °C 2590 °F

Specific Heat Capacity

470 J/kg-K 0.11 BTU/lb-°F

Thermal Conductivity

37 W/m-K 21 BTU/h-ft-°F

Thermal Expansion

13 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

7.5 % IACS

Electrical Conductivity: Equal Weight (Specific)

8.6 % IACS

Otherwise Unclassified Properties

Base Metal Price

3.3 % relative


7.8 g/cm3 490 lb/ft3

Embodied Carbon

1.7 kg CO2/kg material

Embodied Energy

22 MJ/kg 9.4 x 103 BTU/lb

Embodied Water

53 L/kg 6.4 gal/lb

Common Calculations

PREN (Pitting Resistance)


Resilience: Ultimate (Unit Rupture Work)

71 MJ/m3

Resilience: Unit (Modulus of Resilience)

3570 kJ/m3

Stiffness to Weight: Axial

13 points

Stiffness to Weight: Bending

24 points

Strength to Weight: Axial

46 points

Strength to Weight: Bending

34 points

Thermal Diffusivity

9.9 mm2/s

Thermal Shock Resistance

38 points

Alloy Composition

Iron (Fe)Fe 95.5 to 96.9
Manganese (Mn)Mn 1.0 to 1.2
Nickel (Ni)Ni 0.8 to 1.0
Chromium (Cr)Cr 0.7 to 0.9
Molybdenum (Mo)Mo 0.45 to 0.55
Silicon (Si)Si 0 to 0.6
Carbon (C)C 0.2 to 0.27
Phosphorus (P)P 0 to 0.020
Sulfur (S)S 0 to 0.020

All values are % weight. Ranges represent what is permitted under applicable standards.

Followup Questions

Similar Alloys

Further Reading

ASTM A148: Standard Specification for Steel Castings, High Strength, for Structural Purposes

Properties and Selection: Irons, Steels and High Performance Alloys, ASM Handbook vol. 1, ASM International, 1993

Manufacture and Uses of Alloy Steels, Henry D. Hibbard, 2005

Ferrous Materials: Steel and Cast Iron, Hans Berns and Werner Theisen, 2008

Steels: Processing, Structure, and Performance, 2nd ed., George Krauss, 2015