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SAE-AISI 1025 Steel vs. ASTM A372 Grade K Steel

Both SAE-AISI 1025 steel and ASTM A372 grade K steel are iron alloys. They have a very high 95% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI 1025 steel and the bottom bar is ASTM A372 grade K steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 130 to 140
230
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 17 to 28
23
Fatigue Strength, MPa 190 to 280
440
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
73
Shear Strength, MPa 290 to 310
490
Tensile Strength: Ultimate (UTS), MPa 450 to 500
780
Tensile Strength: Yield (Proof), MPa 250 to 420
620

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 400
440
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
48
Thermal Expansion, µm/m-K 12
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 6.9
7.8
Electrical Conductivity: Equal Weight (Specific), % IACS 8.0
8.9

Otherwise Unclassified Properties

Base Metal Price, % relative 1.8
4.4
Density, g/cm3 7.9
7.9
Embodied Carbon, kg CO2/kg material 1.4
1.8
Embodied Energy, MJ/kg 18
24
Embodied Water, L/kg 45
57

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 80 to 110
160
Resilience: Unit (Modulus of Resilience), kJ/m3 170 to 470
1010
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 16 to 18
27
Strength to Weight: Bending, points 17 to 18
24
Thermal Diffusivity, mm2/s 14
13
Thermal Shock Resistance, points 14 to 16
23

Alloy Composition

Carbon (C), % 0.22 to 0.28
0 to 0.18
Chromium (Cr), % 0
1.0 to 1.8
Iron (Fe), % 99.03 to 99.48
93.4 to 96.6
Manganese (Mn), % 0.3 to 0.6
0.1 to 0.4
Molybdenum (Mo), % 0
0.2 to 0.6
Nickel (Ni), % 0
2.0 to 3.3
Phosphorus (P), % 0 to 0.040
0 to 0.015
Silicon (Si), % 0
0.15 to 0.35
Sulfur (S), % 0 to 0.050
0 to 0.010