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Name:1070 steel
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Brief introduction: 1070 steel
AISI 1070 Carbon Steel (UNS G10700)
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GENERAL CHARACTERISTICS OF AISI 1070
AISI 1070 provides exceptional strength while resisting wear, making it ideal for the railway industry. A high-carbon steel that can be oil or water hardened, AISI 1070 also performs well in hand and machine tool applications.


CHEMICAL COMPOSITION OF AISI 1070
Carbon 0.65-0.75
Manganese 0.60-0.90
Phosphorus 0.040 max
Sulfur 0.050 max
Silicon 0.15 to 0.30, or:
0.10 max
0.10-0.20
0.20-0.40
0.30-0.60

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



HEAT TREATMENT OF AISI 1070
Normalize by heating to 1550° to 1650°F (843° to 899°C) before air cooling
Anneal by heating to 1550° to 1575°F (843° to 857°C) before air cooling
Harden by heating to 1450° to 1525°F (788° to 829°C) before water or oil quenching
Temper to appropriate strength and hardness, from 400° to 1300°F (204° to 704°C)
May be austempered and martempered
APPLICATIONS OF AISI 1070
Railroad industry
Railroad rails
Street railway rails
Electric railway wheels
Heavy machine parts
Wire
Hand tools
Machinery for agricultural use
Springs
Mower blades
Auto industry
Torsion and stabilizer bars

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

US Grades
AISI/SAE
Carbon Manganese Phosphorous Sulfur
1045 0.43-0.50 0.60-0.90 0.030 max. 0.050 max.
1050 0.47-0.55 0.60-0.90 0.030 max. 0.050 max.
1055 0.52-0.60 0.60-0.90 0.030 max. 0.050 max.
1060 0.55-0.65 0.60-0.90 0.030 max. 0.050 max.
1065 0.60-0.70 0.60-0.90 0.030 max. 0.050 max.
1070 0.65-0.75 0.60-0.90 0.030 max. 0.050 max.
1074 0.70-0.80 0.50-0.80 0.030 max. 0.050 max.
1075 0.70-0.80 0.40-0.70 0.030 max. 0.050 max.
1080 0.75-0.88 0.60-0.90 0.030 max. 0.050 max.
1085 0.80-0.93 0.70-1.00 0.030 max. 0.050 max.
1090 0.85-0.98 0.60-0.90 0.030 max. 0.050 max.
1095 0.90-1.03 0.30-0.50 0.030 max. 0.050 max.

 

International Grades C Si Mn P S Cr Mo max Ni
C55S 0.52 - 0.60  0.40 max. 0.60 - 0.90 0.025 max. 0.025 max. 0.40 max. 0.1 0.40 max.
C60S 0.57 - 0.65 0.40 max. 0.60 - 0.90 0.025 max. 0.025 max. 0.40 max. 0.1 0.40 max.
C67S 0.65-0.73 0.40 max. 0.60-0.90 0.025 max. 0.025 max. 0.40 max. 0.1 0.40 max.
C75S 0.70 - 0.80 0.40 max. 0.60 - 0.90 0.025 max. 0.025 max. 0.40 max. 0.1 0.40 max.
C85S 0.80 - 0.90 0.40 max. 0.40 - 0.70 0.025 max. 0.025 max. 0.40 max. 0.1 -
C90S 0.85 - 0.95 0.40 max. 0.40 - 0.70 0.025 max. 0.025 max. 0.40 max. 0.1 0.40 max.
C100S 0.95 - 1.05 0.40 max. 0.30 - 0.60 0.025 max. 0.025 max. 0.40 max. 0.1 0.40 max.


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