AISI 1008 Carbon Steel (UNS G10080)

Topics Covered

Chemical Composition
Physical Properties
Mechanical Properties
Thermal Properties
Other Designations


Steels containing mostly carbon as the alloying element are called carbon steels. They contain about 1.2% manganese and 0.4% silicon. Nickel, aluminium, chromium, copper and molybdenum are also present in small quantities in the carbon steels.

AISI 1008 carbon steel has excellent weldability, which includes projection, butt, spot and fusion, and brazeability. The following datasheet will provide more details about AISI 1008 carbon steel.

Chemical Composition

The following table shows the chemical composition of AISI 1008 carbon steel.

Element Content (%)
Iron, Fe 99.31-99.7 %
Manganese, Mn 0.30-0.50 %
Carbon, C 0.10 %
Sulfur, S 0.050 %
Phosphorous, P 0.040 %

Physical Properties

The physical properties of AISI 1008 carbon steel are outlined in the following table.

Properties Metric Imperial
Density (composition 0.06% C, 0.38% Mn, 0.01% Si, annealed at 925°C) 7.872 g/cm3 0.2844 lb/in³

Mechanical Properties

The mechanical properties of cold drawn AISI 1008 carbon steel are tabulated below.

Properties Metric Imperial
Tensile strength 340 MPa 49300 psi
Yield strength (depending on temper) 285 MPa 41300 psi
Elastic modulus 190-210 Gpa 27557-30458 ksi
Bulk modulus (typical for steel) 200 GPa 29000 ksi
Shear modulus (typical for steel) 80.0 GPa 11600 ksi
Poisson’s ratio 0.27-0.30 0.27-0.30
Elongation at break (in 50 mm) 20% 20%
Reduction of area 45% 45%
Hardness, Brinell 95 95
Hardness, Knoop (converted from Brinell hardness) 113 113
Hardness, Rockwell B (converted from Brinell hardness) 55 55
Hardness, Vickers (converted from Brinell hardness) 98 98
Machinability (based on AISI 1212 steel as 100 machinability) The machinability of group I bar, rod, and wire products can be improved by cold drawing) 55 55

Thermal Properties

The thermal properties of AISI 1008 carbon steel are tabulated below.

Properties Metric Imperial
Thermal expansion co-efficient (@0.000-100°C/32-212°F) 12.6 µm/m°C 7 µin/in°F
Thermal conductivity (composition of 0.06% C, 0.4% Mn; 0°C ) 65.2 W/mK 452 BTU in/hr.ft².°F

Other Designations

Equivalent materials to AISI 1008 carbon steel are as follows.

AMS 5040F AMS 5042F AMS 5044D AMS 5047Ac AMS 5050F
AMS 5053C ASTM A108 ASTM A29 ASTM A510 ASTM A519
ASTM A545 ASTM A549 ASTM A575 ASTM A576 SAE J403
FED QQ-S-698 (C1008) MIL-S-11310 (CS1008) FED QQ-S-637 (C1008) UNI CB 10 FU SAE J1397
SAE J412 SAE J414 ASTM A512 ASTM A513 ASTM A575
ASTM A576 ASTM A635 ASTM A830 DIN 1.0204


AISI 1008 carbon steel is primarily used in extruded, cold headed, cold upset, and cold pressed parts and forms.


  1. umesh Patel umesh Patel Sudan says:

    hi would like to know what grade is use to produce e6013 welding electrodes

  2. Prabhakar Rengaswamy Prabhakar Rengaswamy India says:

    Did Aluminium is must in the composition of sae 1008?  If no Al what is the harm in the character of sae 1008 Gr?

  3. Rahul Shanbhag Rahul Shanbhag India says:

    Could this one be used for electromagnet

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