SAE-AISI 1137 (G11370) Carbon Steel
SAE-AISI 1137 steel is a resulfurized carbon steel formulated for primary forming into wrought products. 1137 is the designation in both the SAE and AISI systems for this material. G11370 is the UNS number.
The properties of SAE-AISI 1137 steel include two common variations. This page shows summary ranges across both of them. For more specific values, follow the links immediately below. The graph bars on the material properties cards further below compare SAE-AISI 1137 steel to: wrought resulfurized carbon 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
200 to 210
Elastic (Young's, Tensile) Modulus
190 GPa 27 x 106 psi
Elongation at Break
11 to 17 %
Fatigue Strength
250 to 400 MPa 36 to 58 x 103 psi
Poisson's Ratio
0.29
Reduction in Area
34 to 39 %
Shear Modulus
73 GPa 11 x 106 psi
Shear Strength
430 to 460 MPa 62 to 66 x 103 psi
Tensile Strength: Ultimate (UTS)
700 to 760 MPa 100 to 110 x 103 psi
Tensile Strength: Yield (Proof)
370 to 650 MPa 54 to 94 x 103 psi
Thermal Properties
Latent Heat of Fusion
250 J/g
Maximum Temperature: Mechanical
400 °C 750 °F
Melting Completion (Liquidus)
1460 °C 2660 °F
Melting Onset (Solidus)
1420 °C 2580 °F
Specific Heat Capacity
470 J/kg-K 0.11 BTU/lb-°F
Thermal Conductivity
51 W/m-K 30 BTU/h-ft-°F
Thermal Expansion
13 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
10 % IACS
Electrical Conductivity: Equal Weight (Specific)
12 % IACS
Otherwise Unclassified Properties
Base Metal Price
1.9 % 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
48 L/kg 5.7 gal/lb
Common Calculations
Resilience: Ultimate (Unit Rupture Work)
81 to 100 MJ/m3
Resilience: Unit (Modulus of Resilience)
360 to 1130 kJ/m3
Stiffness to Weight: Axial
13 points
Stiffness to Weight: Bending
24 points
Strength to Weight: Axial
25 to 27 points
Strength to Weight: Bending
22 to 24 points
Thermal Diffusivity
14 mm2/s
Thermal Shock Resistance
21 to 23 points
Alloy Composition
| Fe | 97.8 to 98.3 | |
| Mn | 1.4 to 1.7 | |
| C | 0.32 to 0.39 | |
| S | 0.080 to 0.13 | |
| P | 0 to 0.040 |
All values are % weight. Ranges represent what is permitted under applicable standards.
Followup Questions
Similar Alloys
Further Reading
Cold-Formed Steel Structures to the AISI Specification, Gregory J. Hancock et al., 2001
ASTM A29: Standard Specification for Steel Bars, Carbon and Alloy, Hot-Wrought, General Requirements for
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
Steels: Processing, Structure, and Performance, 2nd ed., George Krauss, 2015