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SAE-AISI 94B30 Steel vs. SAE-AISI 1018 Steel

Both SAE-AISI 94B30 steel and SAE-AISI 1018 steel are iron alloys. They have a very high 99% of their average alloy composition in common. 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 SAE-AISI 94B30 steel and the bottom bar is SAE-AISI 1018 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 150
130 to 140
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 25
17 to 27
Fatigue Strength, MPa 220
180 to 270
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
73
Shear Strength, MPa 320
280 to 300
Tensile Strength: Ultimate (UTS), MPa 500
430 to 480
Tensile Strength: Yield (Proof), MPa 300
240 to 400

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 410
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 39
52
Thermal Expansion, µm/m-K 13
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.2
7.0
Electrical Conductivity: Equal Weight (Specific), % IACS 8.3
8.0

Otherwise Unclassified Properties

Base Metal Price, % relative 2.4
1.8
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 1.5
1.4
Embodied Energy, MJ/kg 20
18
Embodied Water, L/kg 49
46

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 110
75 to 100
Resilience: Unit (Modulus of Resilience), kJ/m3 250
150 to 430
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 18
15 to 17
Strength to Weight: Bending, points 18
16 to 17
Thermal Diffusivity, mm2/s 10
14
Thermal Shock Resistance, points 15
14 to 15

Alloy Composition

Boron (B), % 0.00050 to 0.0030
0
Carbon (C), % 0.28 to 0.33
0.15 to 0.2
Chromium (Cr), % 0.3 to 0.5
0
Iron (Fe), % 97 to 98.1
98.8 to 99.25
Manganese (Mn), % 0.75 to 1.0
0.6 to 0.9
Molybdenum (Mo), % 0.080 to 0.15
0
Nickel (Ni), % 0.3 to 0.6
0
Phosphorus (P), % 0 to 0.035
0 to 0.040
Silicon (Si), % 0.15 to 0.35
0
Sulfur (S), % 0 to 0.040
0 to 0.050