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SAE-AISI 6150 (G61500) Chromium-Vanadium Steel

SAE-AISI 6150 steel is an alloy steel formulated for primary forming into wrought products. 6150 is the designation in both the SAE and AISI systems for this material. G61500 is the UNS number. It has the highest embodied energy among the SAE-AISI wrought steels in the database.

The properties of SAE-AISI 6150 steel include three common variations. This page shows summary ranges across all of them. For more specific values, follow the links immediately below. The graph bars on the material properties cards further below compare SAE-AISI 6150 steel 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

200 to 350

Elastic (Young's, Tensile) Modulus

190 GPa 27 x 106 psi

Elongation at Break

15 to 23 %

Fatigue Strength

300 to 750 MPa 43 to 110 x 103 psi

Poisson's Ratio

0.29

Shear Modulus

73 GPa 11 x 106 psi

Shear Strength

400 to 730 MPa 58 to 110 x 103 psi

Tensile Strength: Ultimate (UTS)

630 to 1200 MPa 91 to 170 x 103 psi

Tensile Strength: Yield (Proof)

420 to 1160 MPa 60 to 170 x 103 psi

Thermal Properties

Latent Heat of Fusion

250 J/g

Maximum Temperature: Mechanical

420 °C 790 °F

Melting Completion (Liquidus)

1460 °C 2650 °F

Melting Onset (Solidus)

1410 °C 2580 °F

Specific Heat Capacity

470 J/kg-K 0.11 BTU/lb-°F

Thermal Conductivity

46 W/m-K 27 BTU/h-ft-°F

Thermal Expansion

12 to 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

2.3 % relative

Density

7.8 g/cm3 490 lb/ft3

Embodied Carbon

2.0 kg CO2/kg material

Embodied Energy

28 MJ/kg 12 x 103 BTU/lb

Embodied Water

51 L/kg 6.1 gal/lb

Common Calculations

Resilience: Ultimate (Unit Rupture Work)

130 to 180 MJ/m3

Resilience: Unit (Modulus of Resilience)

460 to 3590 kJ/m3

Stiffness to Weight: Axial

13 points

Stiffness to Weight: Bending

24 points

Strength to Weight: Axial

22 to 43 points

Strength to Weight: Bending

21 to 32 points

Thermal Diffusivity

13 m2/s

Thermal Shock Resistance

20 to 38 points

Alloy Composition

Among alloy steels, the composition of SAE-AISI 6150 steel is notable for including vanadium (V). Vanadium has a strong hardening effect, but this effect is particularly sensitive to the type of tempering.

Iron (Fe) 96.7 to 97.7
Chromium (Cr) 0.8 to 1.1
Manganese (Mn) 0.7 to 0.9
Carbon (C) 0.48 to 0.53
Silicon (Si) 0.15 to 0.35
Vanadium (V) 0.15 to 0.3
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

Similar Alloys

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

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

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