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SAE-AISI 1108 Steel vs. AISI 302B Stainless Steel

Both SAE-AISI 1108 steel and AISI 302B stainless steel are iron alloys. They have 70% of their average alloy composition in common. There are 32 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI 1108 steel and the bottom bar is AISI 302B stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 110 to 140
190
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 23 to 34
45
Fatigue Strength, MPa 170 to 260
210
Poisson's Ratio 0.29
0.28
Reduction in Area, % 45 to 57
57
Shear Modulus, GPa 73
76
Shear Strength, MPa 250 to 280
410
Tensile Strength: Ultimate (UTS), MPa 380 to 440
580
Tensile Strength: Yield (Proof), MPa 220 to 360
230

Thermal Properties

Latent Heat of Fusion, J/g 250
320
Maximum Temperature: Mechanical, °C 400
930
Melting Completion (Liquidus), °C 1460
1400
Melting Onset (Solidus), °C 1420
1360
Specific Heat Capacity, J/kg-K 470
490
Thermal Conductivity, W/m-K 52
17
Thermal Expansion, µm/m-K 12
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.0
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 8.0
2.6

Otherwise Unclassified Properties

Base Metal Price, % relative 1.8
15
Density, g/cm3 7.9
7.7
Embodied Carbon, kg CO2/kg material 1.4
3.0
Embodied Energy, MJ/kg 18
43
Embodied Water, L/kg 46
140

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 95 to 110
210
Resilience: Unit (Modulus of Resilience), kJ/m3 130 to 340
140
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 13 to 16
21
Strength to Weight: Bending, points 15 to 16
20
Thermal Diffusivity, mm2/s 14
4.4
Thermal Shock Resistance, points 12 to 14
13

Alloy Composition

Carbon (C), % 0.080 to 0.13
0 to 0.15
Chromium (Cr), % 0
17 to 19
Iron (Fe), % 98.9 to 99.24
65.7 to 73
Manganese (Mn), % 0.6 to 0.8
0 to 2.0
Nickel (Ni), % 0
8.0 to 10
Nitrogen (N), % 0
0 to 0.1
Phosphorus (P), % 0 to 0.040
0 to 0.045
Silicon (Si), % 0
2.0 to 3.0
Sulfur (S), % 0.080 to 0.13
0 to 0.030