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SAE-AISI 94B17 Steel vs. ASTM A372 Grade J Steel

Both SAE-AISI 94B17 steel and ASTM A372 grade J steel are iron alloys. Their average alloy composition is basically identical.

For each property being compared, the top bar is SAE-AISI 94B17 steel and the bottom bar is ASTM A372 grade J steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 130
200 to 310
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 25
17 to 22
Fatigue Strength, MPa 200
310 to 570
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
73
Shear Strength, MPa 280
410 to 630
Tensile Strength: Ultimate (UTS), MPa 440
650 to 1020
Tensile Strength: Yield (Proof), MPa 270
430 to 850

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 410
420
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 39
44
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.2
7.3
Electrical Conductivity: Equal Weight (Specific), % IACS 8.3
8.4

Otherwise Unclassified Properties

Base Metal Price, % relative 2.4
2.4
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.5
1.5
Embodied Energy, MJ/kg 20
20
Embodied Water, L/kg 49
51

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 96
130 to 170
Resilience: Unit (Modulus of Resilience), kJ/m3 200
500 to 1930
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 16
23 to 36
Strength to Weight: Bending, points 16
21 to 29
Thermal Diffusivity, mm2/s 10
12
Thermal Shock Resistance, points 13
19 to 30

Alloy Composition

Boron (B), % 0.00050 to 0.0030
0
Carbon (C), % 0.15 to 0.2
0.35 to 0.5
Chromium (Cr), % 0.3 to 0.5
0.8 to 1.2
Iron (Fe), % 97.1 to 98.3
96.7 to 97.8
Manganese (Mn), % 0.75 to 1.0
0.75 to 1.1
Molybdenum (Mo), % 0.080 to 0.15
0.15 to 0.25
Nickel (Ni), % 0.3 to 0.6
0
Phosphorus (P), % 0 to 0.035
0 to 0.015
Silicon (Si), % 0.15 to 0.35
0.15 to 0.35
Sulfur (S), % 0 to 0.040
0 to 0.010