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H1025 Hardened CB7Cu-1 Cast Stainless Steel

H1025 CB7Cu-1 is ACI-ASTM CB7Cu-1 steel in the hardened (H) condition. The graph bars on the material properties cards below compare H1025 CB7Cu-1 to: cast precipitation-hardening stainless 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

350

Elastic (Young's, Tensile) Modulus

190 GPa 28 x 106 psi

Elongation at Break

10 %

Fatigue Strength

590 MPa 85 x 103 psi

Impact Strength: V-Notched Charpy

34 J 25 ft-lb

Poisson's Ratio

0.28

Shear Modulus

76 GPa 11 x 106 psi

Tensile Strength: Ultimate (UTS)

1160 MPa 170 x 103 psi

Tensile Strength: Yield (Proof)

1100 MPa 160 x 103 psi

Thermal Properties

Latent Heat of Fusion

280 J/g

Melting Completion (Liquidus)

1430 °C 2600 °F

Melting Onset (Solidus)

1500 °C 2730 °F

Specific Heat Capacity

480 J/kg-K 0.11 BTU/lb-°F

Thermal Conductivity

17 W/m-K 9.8 BTU/h-ft-°F

Thermal Expansion

11 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

2.0 % IACS

Electrical Conductivity: Equal Weight (Specific)

2.3 % IACS

Otherwise Unclassified Properties

Base Metal Price

13 % relative

Density

7.8 g/cm3 490 lb/ft3

Embodied Carbon

2.6 kg CO2/kg material

Embodied Energy

38 MJ/kg 16 x 103 BTU/lb

Embodied Water

130 L/kg 16 gal/lb

Common Calculations

PREN (Pitting Resistance)

17

Resilience: Ultimate (Unit Rupture Work)

120 MJ/m3

Resilience: Unit (Modulus of Resilience)

3120 kJ/m3

Stiffness to Weight: Axial

14 points

Stiffness to Weight: Bending

25 points

Strength to Weight: Axial

41 points

Strength to Weight: Bending

31 points

Thermal Diffusivity

4.6 mm2/s

Thermal Shock Resistance

39 points

Alloy Composition

Iron (Fe)Fe 72.3 to 78.4
Chromium (Cr)Cr 15.5 to 17.7
Nickel (Ni)Ni 3.6 to 4.6
Copper (Cu)Cu 2.5 to 3.2
Silicon (Si)Si 0 to 1.0
Manganese (Mn)Mn 0 to 0.7
Niobium (Nb)Nb 0 to 0.35
Carbon (C)C 0 to 0.070
Nitrogen (N)N 0 to 0.050
Phosphorus (P)P 0 to 0.035
Sulfur (S)S 0 to 0.030

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

Followup Questions

Further Reading

ASTM A747: Standard Specification for Steel Castings, Stainless, Precipitation Hardening

Machining of Stainless Steels and Super Alloys: Traditional and Nontraditional Techniques, Helmi A. Youssef, 2016

Welding Metallurgy of Stainless Steels, Erich Folkhard et al., 2012

Corrosion of Stainless Steels, A. John Sedriks, 1996

ASM Specialty Handbook: Stainless Steels, J. R. Davis (editor), 1994

Advances in Stainless Steels, Baldev Raj et al. (editors), 2010

CRC Materials Science and Engineering Handbook, 4th ed., James F. Shackelford et al. (editors), 2015