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.
Chemical Composition
The chemical composition of AISI 1070 carbon steel is outlined in the following table.
Element Content (%) Iron, Fe
~ 98
Carbon, C 0.65 - 0.75 Manganese, Mn 0.60 - 0.90 Sulfur, S 0.050 (max) Phosphorous, P 0.04 (max) Physical Properties
The physical properties of AISI 1070 carbon steel are tabulated below.
Properties Metric Imperial Density 7.7-8.03 g/cm3 0.278-0.290 lb/in³ Mechanical Properties
The following table shows mechanical properties of cold drawn AISI 1070 carbon steel.
Properties Metric Imperial Elastic modulus 190-210 GPa 29700-30458 ksi Poisson’s ratio 0.27-0.30 0.27-0.30 Thermal Properties
The thermal properties of AISI 1070 carbon steel are given in the following table.
Properties Conditions T (ºC) Treatment Thermal expansion co-efficient 11.8 x (10-6/ ºC) 0 - 100 - Other Designations
Other designations that are equivalent to AISI 1070 carbon steel include the following:
- AMS 5115
- AMS 5115C
- ASTM A29 (1070)
- ASTM A510 (1070)
- ASTM A576 (1070)
- ASTM A682 (1070)
- ASTM A713 (1070)
- ASTM A830
- MIL S-11713
- MIL S-12504
- SAE J1397 (1070)
- SAE J403 (1070)
- SAE J412 (1070)
- DIN 1.1231
- SS 1770
- SS 1778
- AFNOR XC 68
MACHINABILITY OF AISI 1070
Cobalt high-speed steel or carbide-tip tools
Sulfurized or chlorinated cutting oils for high-speed steel cutters
No oil for carbide-tip tools
Grind high-speed steel turning tools
8-12° side rake
6-10° back rake
7-9° side and end relief
12-16° side cutting-edge angle
8-14° end cutting-edge angle
Nose radius 10% of cut depth
Grind carbide-tip tools
6-12° side rake
2-8° back rake
6-10° side and end relief
8-12° end cutting-edge angle
8-16° side cutting-edge angle
1/32” nose radius
WORKABILITY OF AISI 1070
Forge and hot roll form 1800° to 2225°F (982° to 1218°C)
1650°F (899°C) minimum for hot working
Still-air cool
Easily cold drawn when annealed
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