SAE-AISI 1070 (C70, 1.1520, G10700) Carbon Steel
SAE-AISI 1070 steel is a carbon (non-alloy) 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 fairly low ductility among wrought carbon or non-alloy steels. In addition, it has a fairly high electrical conductivity and can have a moderately high tensile strength.
The properties of SAE-AISI 1070 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 1070 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
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
Latent Heat of Fusion
250 J/g
Maximum Temperature: Mechanical
400 °C 750 °F
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
14 mm2/s
Thermal Shock Resistance
21 to 25 points
Alloy Composition
| Fe | 98.3 to 98.8 | |
| Mn | 0.6 to 0.9 | |
| C | 0.65 to 0.75 | |
| S | 0 to 0.050 | |
| 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
Microstructure of Steels and Cast Irons, Madeleine Durand-Charre, 2004
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