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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.

It has three common variants, each represented as a separate material. The material properties section shows ranges encompassing all variants. To see the details of each variant on a separate page, follow the links in the Variant Materials section further below.

Mechanical Properties

Graph bars compare SAE-AISI 1070 steel to other materials. From top to bottom: wrought plain carbon steel, iron alloys, and the entire database.

Brinell Hardness

190 to 230

Elastic (Young's, Tensile) Modulus

190 GPa 27 x 106 psi

Elongation at Break

10 to 13 %

Modulus of Resilience (Unit Resilience)

490 to 880 kJ/m3

Poisson's Ratio


Reduction in Area

35 to 52 %

Shear Modulus

72 GPa 10 x 106 psi

Shear Strength

380 to 470 MPa 55 to 68 x 103 psi

Strength to Weight Ratio

82 to 99 kN-m/kg

Tensile Strength: Ultimate (UTS)

640 to 770 MPa 93 to 110 x 103 psi

Tensile Strength: Yield (Proof)

430 to 570 MPa 62 to 83 x 103 psi

Unit Rupture Work (Ultimate Resilience)

59 to 88 MJ/m3

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 Diffusivity

13 m2/s

Thermal Expansion

12 µm/m-K

Other Material Properties

Base Metal Price

3.0 % relative


7.8 g/cm3 490 lb/ft3

Electrical Conductivity: Equal Volume

10 % IACS

Electrical Conductivity: Equal Weight (Specific)

12 % IACS

Electrical Resistivity Order of Magnitude

-7.0 10x Ω-m

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

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

Variant Materials

Similar Alloys

Further Reading

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

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