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SAE-AISI 1548 (formerly 1048, 1.1226, G15480) Carbon Steel

SAE-AISI 1548 steel is a resulfurized carbon steel formulated for primary forming into wrought products. 1548 is the designation in both the SAE and AISI systems for this material. 1.1226 is the EN numeric designation. And G15480 is the UNS number. Older literature may refer to this material as AISI 1048, but this is now discouraged.

The properties of SAE-AISI 1548 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 1548 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

220 to 250

Elastic (Young's, Tensile) Modulus

190 GPa 27 x 106 psi

Elongation at Break

11 to 16 %

Fatigue Strength

270 to 430 MPa 40 to 62 x 103 psi

Poisson's Ratio

0.29

Reduction in Area

31 to 39 %

Shear Modulus

72 GPa 11 x 106 psi

Shear Strength

440 to 500 MPa 64 to 73 x 103 psi

Tensile Strength: Ultimate (UTS)

730 to 830 MPa 110 to 120 x 103 psi

Tensile Strength: Yield (Proof)

420 to 690 MPa 61 to 100 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 2580 °F

Specific Heat Capacity

470 J/kg-K 0.11 BTU/lb-°F

Thermal Conductivity

51 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

47 L/kg 5.6 gal/lb

Common Calculations

Resilience: Ultimate (Unit Rupture Work)

79 to 99 MJ/m3

Resilience: Unit (Modulus of Resilience)

470 to 1280 kJ/m3

Stiffness to Weight: Axial

13 points

Stiffness to Weight: Bending

24 points

Strength to Weight: Axial

26 to 30 points

Strength to Weight: Bending

23 to 25 points

Thermal Diffusivity

14 mm2/s

Thermal Shock Resistance

23 to 27 points

Alloy Composition

Iron (Fe) 98 to 98.5
Manganese (Mn) 1.1 to 1.4
Carbon (C) 0.44 to 0.52
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

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

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

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