SAE-AISI 1043 (G10430) Carbon Steel
SAE-AISI 1043 steel is a carbon (non-alloy) steel formulated for primary forming into wrought products. 1043 is the designation in both the SAE and AISI systems for this material. G10430 is the UNS number.
It can have a moderately high tensile strength among the wrought carbon or non-alloy steels in the database.
The properties of SAE-AISI 1043 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 1043 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 200
Elastic (Young's, Tensile) Modulus
190 GPa 27 x 106 psi
Elongation at Break
13 to 18 %
Fatigue Strength
230 to 390 MPa 34 to 56 x 103 psi
Poisson's Ratio
0.29
Reduction in Area
40 to 51 %
Shear Modulus
73 GPa 11 x 106 psi
Shear Strength
400 to 430 MPa 58 to 62 x 103 psi
Tensile Strength: Ultimate (UTS)
650 to 710 MPa 94 to 100 x 103 psi
Tensile Strength: Yield (Proof)
350 to 600 MPa 50 to 88 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 2590 °F
Specific Heat Capacity
470 J/kg-K 0.11 BTU/lb-°F
Thermal Conductivity
51 W/m-K 29 BTU/h-ft-°F
Thermal Expansion
12 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
7.0 % IACS
Electrical Conductivity: Equal Weight (Specific)
8.1 % 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
18 MJ/kg 7.9 x 103 BTU/lb
Embodied Water
46 L/kg 5.5 gal/lb
Common Calculations
Resilience: Ultimate (Unit Rupture Work)
87 to 100 MJ/m3
Resilience: Unit (Modulus of Resilience)
320 to 980 kJ/m3
Stiffness to Weight: Axial
13 points
Stiffness to Weight: Bending
24 points
Strength to Weight: Axial
23 to 25 points
Strength to Weight: Bending
21 to 22 points
Thermal Diffusivity
14 mm2/s
Thermal Shock Resistance
21 to 22 points
Alloy Composition
| Fe | 98.4 to 98.9 | |
| Mn | 0.7 to 1.0 | |
| C | 0.4 to 0.47 | |
| 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
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
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
Steels: Processing, Structure, and Performance, 2nd ed., George Krauss, 2015