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Annealed Grade 250 Maraging Steel

Annealed 250 maraging steel is grade 250 maraging steel in the annealed condition. The graph bars on the material properties cards below compare annealed 250 maraging steel to: maraging 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

Compressive (Crushing) Strength

730 MPa 110 x 103 psi

Elastic (Young's, Tensile) Modulus

190 GPa 28 x 106 psi

Elongation at Break

17 %

Poisson's Ratio

0.3

Rockwell C Hardness

30

Shear Modulus

75 GPa 11 x 106 psi

Shear Strength

600 MPa 87 x 103 psi

Tensile Strength: Ultimate (UTS)

970 MPa 140 x 103 psi

Tensile Strength: Yield (Proof)

660 MPa 96 x 103 psi

Thermal Properties

Latent Heat of Fusion

270 J/g

Melting Completion (Liquidus)

1480 °C 2690 °F

Melting Onset (Solidus)

1430 °C 2610 °F

Specific Heat Capacity

450 J/kg-K 0.11 BTU/lb-°F

Thermal Expansion

12 µm/m-K

Otherwise Unclassified Properties

Base Metal Price

32 % relative

Density

8.2 g/cm3 510 lb/ft3

Embodied Carbon

4.9 kg CO2/kg material

Embodied Energy

65 MJ/kg 28 x 103 BTU/lb

Embodied Water

140 L/kg 16 gal/lb

Common Calculations

PREN (Pitting Resistance)

16

Resilience: Ultimate (Unit Rupture Work)

150 MJ/m3

Resilience: Unit (Modulus of Resilience)

1120 kJ/m3

Stiffness to Weight: Axial

13 points

Stiffness to Weight: Bending

23 points

Strength to Weight: Axial

33 points

Strength to Weight: Bending

26 points

Thermal Shock Resistance

29 points

Alloy Composition

Iron (Fe) 66.3 to 71.1
Nickel (Ni) 17 to 19
Cobalt (Co) 7.0 to 8.5
Molybdenum (Mo) 4.6 to 5.2
Titanium (Ti) 0.3 to 0.5
Aluminum (Al) 0.050 to 0.15
Manganese (Mn) 0 to 0.1
Silicon (Si) 0 to 0.1
Calcium (Ca) 0 to 0.050
Carbon (C) 0 to 0.030
Zirconium (Zr) 0 to 0.020
Phosphorus (P) 0 to 0.010
Sulfur (S) 0 to 0.010
Boron (B) 0 to 0.0030

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

Followup Questions

Further Reading

MIL-S-46850D: Steel: Bar, Plate, Sheet, Strip, Forgings, and Extrusions, 18 Percent Nickel Alloy, Maraging, 200 KSI, 250 KSI, 300 KSI, and 350 KSI, High Quality

Maraging Steels: Modelling of Microstructure, Properties and Applications, Wei Sha and Zhanli Guo, 2009

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

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