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Annealed 4620 Nickel Steel

Annealed SAE-AISI 4620 is SAE-AISI 4620 steel in the annealed condition. The graph bars on the material properties cards below compare annealed SAE-AISI 4620 to: SAE-AISI wrought 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

150

Elastic (Young's, Tensile) Modulus

190 GPa 27 x 106 psi

Elongation at Break

27 %

Fatigue Strength

260 MPa 38 x 103 psi

Poisson's Ratio

0.29

Shear Modulus

73 GPa 11 x 106 psi

Shear Strength

320 MPa 46 x 103 psi

Tensile Strength: Ultimate (UTS)

490 MPa 71 x 103 psi

Tensile Strength: Yield (Proof)

350 MPa 51 x 103 psi

Thermal Properties

Latent Heat of Fusion

250 J/g

Maximum Temperature: Mechanical

410 °C 770 °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

47 W/m-K 27 BTU/h-ft-°F

Thermal Expansion

13 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

7.3 % IACS

Electrical Conductivity: Equal Weight (Specific)

8.4 % IACS

Otherwise Unclassified Properties

Base Metal Price

3.2 % relative

Density

7.9 g/cm3 490 lb/ft3

Embodied Carbon

1.6 kg CO2/kg material

Embodied Energy

22 MJ/kg 9.3 x 103 BTU/lb

Embodied Water

50 L/kg 5.9 gal/lb

Common Calculations

Resilience: Ultimate (Unit Rupture Work)

120 MJ/m3

Resilience: Unit (Modulus of Resilience)

330 kJ/m3

Stiffness to Weight: Axial

13 points

Stiffness to Weight: Bending

24 points

Strength to Weight: Axial

17 points

Strength to Weight: Bending

18 points

Thermal Diffusivity

13 mm2/s

Thermal Shock Resistance

15 points

Alloy Composition

Iron (Fe) 96.4 to 97.4
Nickel (Ni) 1.7 to 2.0
Manganese (Mn) 0.45 to 0.65
Silicon (Si) 0.15 to 0.35
Molybdenum (Mo) 0.2 to 0.3
Carbon (C) 0.17 to 0.22
Sulfur (S) 0 to 0.040
Phosphorus (P) 0 to 0.035

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

Followup Questions

Further Reading

ASTM A752: Standard Specification for General Requirements for Wire Rods and Coarse Round Wire, Alloy Steel

ASTM A322: Standard Specification for Steel Bars, Alloy, Standard Grades

ASM Specialty Handbook: Carbon and Alloy Steels, J. R. Davis (editor), 1996

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

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