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SAE-AISI 1074 (G10740) Carbon Steel

SAE-AISI 1074 steel is a carbon (non-alloy) steel formulated for primary forming into wrought products. 1074 is the designation in both the SAE and AISI systems for this material. G10740 is the UNS number.

It can have a moderately low ductility and a fairly high tensile strength among wrought carbon or non-alloy steels.

The properties of SAE-AISI 1074 steel include two common variations. This page shows summary ranges across both of them. For more specific values, follow the links immediately below. The graph bars on the material properties cards further below compare SAE-AISI 1074 steel to: wrought carbon or non-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

220 to 250

Elastic (Young's, Tensile) Modulus

190 GPa 27 x 106 psi

Elongation at Break

11 to 14 %

Fatigue Strength

290 to 350 MPa 42 to 51 x 103 psi

Poisson's Ratio

0.29

Reduction in Area

34 to 45 %

Shear Modulus

72 GPa 10 x 106 psi

Shear Strength

440 to 490 MPa 64 to 72 x 103 psi

Tensile Strength: Ultimate (UTS)

740 to 820 MPa 110 to 120 x 103 psi

Tensile Strength: Yield (Proof)

450 to 570 MPa 66 to 82 x 103 psi

Thermal Properties

Latent Heat of Fusion

250 J/g

Maximum Temperature: Mechanical

400 °C 750 °F

Melting Completion (Liquidus)

1460 °C 2650 °F

Melting Onset (Solidus)

1420 °C 2580 °F

Specific Heat Capacity

470 J/kg-K 0.11 BTU/lb-°F

Thermal Conductivity

50 W/m-K 29 BTU/h-ft-°F

Thermal Expansion

12 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

7.1 % IACS

Electrical Conductivity: Equal Weight (Specific)

8.1 % IACS

Otherwise Unclassified Properties

Base Metal Price

1.8 % relative

Density

7.8 g/cm3 490 lb/ft3

Embodied Carbon

1.4 kg CO2/kg material

Embodied Energy

19 MJ/kg 8.0 x 103 BTU/lb

Embodied Water

46 L/kg 5.4 gal/lb

Common Calculations

Resilience: Ultimate (Unit Rupture Work)

77 to 94 MJ/m3

Resilience: Unit (Modulus of Resilience)

550 to 860 kJ/m3

Stiffness to Weight: Axial

13 points

Stiffness to Weight: Bending

24 points

Strength to Weight: Axial

26 to 29 points

Strength to Weight: Bending

23 to 25 points

Thermal Diffusivity

14 m2/s

Thermal Shock Resistance

24 to 26 points

Alloy Composition

Iron (Fe) 98.3 to 98.8
Carbon (C) 0.7 to 0.8
Manganese (Mn) 0.5 to 0.8
Sulfur (S) 0 to 0.050
Phosphorus (P) 0 to 0.040

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

Followup Questions

Similar Alloys

Further Reading

Cold-Formed Steel Structures to the AISI Specification, Gregory J. Hancock et al., 2001

ASTM A29: Standard Specification for Steel Bars, Carbon and Alloy, Hot-Wrought, General Requirements for

Carbon Steel Handbook, D. Gandy, 2007

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

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

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