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ASTM A372 Grade K Steel vs. SAE-AISI 1008 Steel

Both ASTM A372 grade K steel and SAE-AISI 1008 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 ASTM A372 grade K steel and the bottom bar is SAE-AISI 1008 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 230
93 to 100
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 23
22 to 33
Fatigue Strength, MPa 440
150 to 220
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
73
Shear Strength, MPa 490
220 to 230
Tensile Strength: Ultimate (UTS), MPa 780
330 to 370
Tensile Strength: Yield (Proof), MPa 620
190 to 310

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 440
400
Melting Completion (Liquidus), °C 1460
1470
Melting Onset (Solidus), °C 1420
1430
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 48
62
Thermal Expansion, µm/m-K 13
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.8
6.9
Electrical Conductivity: Equal Weight (Specific), % IACS 8.9
7.9

Otherwise Unclassified Properties

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

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 160
78 to 91
Resilience: Unit (Modulus of Resilience), kJ/m3 1010
92 to 260
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 27
12 to 13
Strength to Weight: Bending, points 24
13 to 15
Thermal Diffusivity, mm2/s 13
17
Thermal Shock Resistance, points 23
10 to 12

Alloy Composition

Carbon (C), % 0 to 0.18
0 to 0.1
Chromium (Cr), % 1.0 to 1.8
0
Iron (Fe), % 93.4 to 96.6
99.31 to 99.7
Manganese (Mn), % 0.1 to 0.4
0.3 to 0.5
Molybdenum (Mo), % 0.2 to 0.6
0
Nickel (Ni), % 2.0 to 3.3
0
Phosphorus (P), % 0 to 0.015
0 to 0.040
Silicon (Si), % 0.15 to 0.35
0
Sulfur (S), % 0 to 0.010
0 to 0.050