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SAE-AISI 1524 (formerly 1024, G15240) Carbon Steel

SAE-AISI 1524 steel is a resulfurized carbon steel formulated for primary forming into wrought products. 1524 is the designation in both the SAE and AISI systems for this material. G15240 is the UNS number. Older literature may refer to this material as AISI 1024, but this is now discouraged.

The properties of SAE-AISI 1524 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 1524 steel to: wrought resulfurized carbon 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

170 to 180

Elastic (Young's, Tensile) Modulus

190 GPa 27 x 106 psi

Elongation at Break

14 to 22 %

Fatigue Strength

230 to 340 MPa 33 to 50 x 103 psi

Poisson's Ratio

0.29

Reduction in Area

39 to 48 %

Shear Modulus

73 GPa 11 x 106 psi

Shear Strength

360 to 390 MPa 52 to 57 x 103 psi

Tensile Strength: Ultimate (UTS)

570 to 650 MPa 83 to 94 x 103 psi

Tensile Strength: Yield (Proof)

320 to 540 MPa 47 to 78 x 103 psi

Thermal Properties

Latent Heat of Fusion

250 J/g

Maximum Temperature: Mechanical

400 °C 750 °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

52 W/m-K 30 BTU/h-ft-°F

Thermal Expansion

12 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

8.3 % IACS

Electrical Conductivity: Equal Weight (Specific)

9.5 % IACS

Otherwise Unclassified Properties

Base Metal Price

1.9 % 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

48 L/kg 5.7 gal/lb

Common Calculations

Resilience: Ultimate (Unit Rupture Work)

84 to 110 MJ/m3

Resilience: Unit (Modulus of Resilience)

270 to 760 kJ/m3

Stiffness to Weight: Axial

13 points

Stiffness to Weight: Bending

24 points

Strength to Weight: Axial

20 to 23 points

Strength to Weight: Bending

19 to 21 points

Thermal Diffusivity

14 mm2/s

Thermal Shock Resistance

18 to 21 points

Alloy Composition

Iron (Fe) 98 to 98.5
Manganese (Mn) 1.4 to 1.7
Carbon (C) 0.19 to 0.25
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