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ASTM A242 HSLA Steel vs. SAE-AISI 1039 Steel

Both ASTM A242 HSLA steel and SAE-AISI 1039 steel are iron alloys. Their average alloy composition is basically identical. There are 31 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.

For each property being compared, the top bar is ASTM A242 HSLA steel and the bottom bar is SAE-AISI 1039 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 150
180 to 200
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 22
14 to 18
Fatigue Strength, MPa 230
230 to 370
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
73
Shear Strength, MPa 310
380 to 420
Tensile Strength: Ultimate (UTS), MPa 490
610 to 690
Tensile Strength: Yield (Proof), MPa 330
340 to 580

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 400
400
Melting Completion (Liquidus), °C 1460
1460
Melting Onset (Solidus), °C 1420
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 52
51
Thermal Expansion, µm/m-K 13
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.1
7.0
Electrical Conductivity: Equal Weight (Specific), % IACS 8.1
8.1

Otherwise Unclassified Properties

Base Metal Price, % relative 1.9
1.8
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 1.4
1.4
Embodied Energy, MJ/kg 18
18
Embodied Water, L/kg 46
46

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 95
88 to 94
Resilience: Unit (Modulus of Resilience), kJ/m3 290
310 to 890
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 17
22 to 24
Strength to Weight: Bending, points 17
20 to 22
Thermal Diffusivity, mm2/s 14
14
Thermal Shock Resistance, points 14
19 to 22

Alloy Composition

Carbon (C), % 0 to 0.15
0.37 to 0.44
Copper (Cu), % 0.2 to 0.45
0
Iron (Fe), % 98.2 to 99.8
98.5 to 98.9
Manganese (Mn), % 0 to 1.0
0.7 to 1.0
Phosphorus (P), % 0 to 0.15
0 to 0.040
Sulfur (S), % 0 to 0.050
0 to 0.050