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SAE-AISI 1038 (G10380) Carbon Steel

SAE-AISI 1038 steel is a carbon (non-alloy) steel formulated for primary forming into wrought products. 1038 is the designation in both the SAE and AISI systems for this material. G10380 is the UNS number.

It can have a moderately high tensile strength among the wrought carbon or non-alloy steels in the database.

The properties of SAE-AISI 1038 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 1038 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

170 to 180

Elastic (Young's, Tensile) Modulus

190 GPa 27 x 106 psi

Elongation at Break

14 to 20 %

Fatigue Strength

220 to 350 MPa 32 to 50 x 103 psi

Poisson's Ratio

0.29

Reduction in Area

40 to 45 %

Shear Modulus

73 GPa 11 x 106 psi

Shear Strength

370 to 390 MPa 53 to 57 x 103 psi

Tensile Strength: Ultimate (UTS)

590 to 640 MPa 85 to 93 x 103 psi

Tensile Strength: Yield (Proof)

320 to 540 MPa 46 to 79 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

51 W/m-K 30 BTU/h-ft-°F

Thermal Expansion

12 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

7.0 % IACS

Electrical Conductivity: Equal Weight (Specific)

8.0 % 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

18 MJ/kg 7.9 x 103 BTU/lb

Embodied Water

46 L/kg 5.5 gal/lb

Common Calculations

Resilience: Ultimate (Unit Rupture Work)

83 to 100 MJ/m3

Resilience: Unit (Modulus of Resilience)

270 to 790 kJ/m3

Stiffness to Weight: Axial

13 points

Stiffness to Weight: Bending

24 points

Strength to Weight: Axial

21 to 23 points

Strength to Weight: Bending

20 to 21 points

Thermal Diffusivity

14 mm2/s

Thermal Shock Resistance

19 to 20 points

Alloy Composition

Iron (Fe) 98.6 to 99.05
Manganese (Mn) 0.6 to 0.9
Carbon (C) 0.35 to 0.42
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

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