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SAE-AISI 94B30 Steel vs. ASTM A203 Steel

Both SAE-AISI 94B30 steel and ASTM A203 steel are iron alloys.

For each property being compared, the top bar is SAE-AISI 94B30 steel and the bottom bar is ASTM A203 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 150
160 to 180
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 25
22 to 26
Fatigue Strength, MPa 220
210 to 280
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
73
Shear Strength, MPa 320
330 to 370
Tensile Strength: Ultimate (UTS), MPa 500
520 to 590
Tensile Strength: Yield (Proof), MPa 300
290 to 390

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 410
410
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
52
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.2
7.4 to 7.6
Electrical Conductivity: Equal Weight (Specific), % IACS 8.3
8.5 to 8.7

Otherwise Unclassified Properties

Base Metal Price, % relative 2.4
3.2 to 4.0
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 1.5
1.6 to 1.7
Embodied Energy, MJ/kg 20
21 to 23
Embodied Water, L/kg 49
50 to 52

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 110
110 to 120
Resilience: Unit (Modulus of Resilience), kJ/m3 250
230 to 410
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 18
18 to 21
Strength to Weight: Bending, points 18
18 to 20
Thermal Diffusivity, mm2/s 10
14
Thermal Shock Resistance, points 15
15 to 17