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SAE-AISI 1070 (C70, 1.1520, G10700) Carbon Steel

SAE-AISI 1070 steel is a plain carbon steel formulated for primary forming into wrought products. 1070 is the designation in both the SAE and AISI systems for this material. 1.1520 is the EN numeric designation. And G10700 is the UNS number.

It can have a moderately low ductility relative to other wrought plain carbon steels in the database.

The properties of SAE-AISI 1070 steel include three common variations. The property values on this page show 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 1070 steel to: wrought plain carbon steels (top), all iron alloys (middle), and the entire database (bottom).

Mechanical Properties

Brinell Hardness

190 to 230

Elastic (Young's, Tensile) Modulus

190 GPa 27 x 106 psi

Elongation at Break

10 to 13 %

Fatigue Strength

270 to 350 MPa 39 to 51 x 103 psi

Poisson's Ratio

0.29

Reduction in Area

34 to 51 %

Shear Modulus

72 GPa 10 x 106 psi

Shear Strength

380 to 460 MPa 55 to 67 x 103 psi

Tensile Strength: Ultimate (UTS)

640 to 760 MPa 93 to 110 x 103 psi

Tensile Strength: Yield (Proof)

420 to 560 MPa 61 to 82 x 103 psi

Thermal Properties

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

10 % IACS

Electrical Conductivity: Equal Weight (Specific)

12 % 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 5.5 gal/lb

Common Calculations

Resilience: Ultimate (Unit Rupture Work)

59 to 86 MJ/m3

Resilience: Unit (Modulus of Resilience)

470 to 850 kJ/m3

Stiffness to Weight: Axial

13 points

Stiffness to Weight: Bending

24 points

Strength to Weight: Axial

23 to 27 points

Strength to Weight: Bending

21 to 24 points

Thermal Diffusivity

13 m2/s

Thermal Shock Resistance

21 to 25 points

Alloy Composition

Iron (Fe) 98.3 to 98.8
Manganese (Mn) 0.6 to 0.9
Carbon (C) 0.65 to 0.75
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

Microstructure of Steels and Cast Irons, Madeleine Durand-Charre, 2004

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

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

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

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