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S30815 Stainless Steel vs. SAE-AISI 94B30 Steel

Both S30815 stainless steel and SAE-AISI 94B30 steel are iron alloys. Both are furnished in the annealed condition. They have 67% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is S30815 stainless steel and the bottom bar is SAE-AISI 94B30 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190
150
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 45
25
Fatigue Strength, MPa 320
220
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
73
Shear Strength, MPa 480
320
Tensile Strength: Ultimate (UTS), MPa 680
500
Tensile Strength: Yield (Proof), MPa 350
300

Thermal Properties

Latent Heat of Fusion, J/g 310
250
Maximum Temperature: Mechanical, °C 1020
410
Melting Completion (Liquidus), °C 1400
1460
Melting Onset (Solidus), °C 1360
1420
Specific Heat Capacity, J/kg-K 490
470
Thermal Conductivity, W/m-K 15
39
Thermal Expansion, µm/m-K 17
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
7.2
Electrical Conductivity: Equal Weight (Specific), % IACS 2.4
8.3

Otherwise Unclassified Properties

Base Metal Price, % relative 17
2.4
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 3.3
1.5
Embodied Energy, MJ/kg 47
20
Embodied Water, L/kg 160
49

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 260
110
Resilience: Unit (Modulus of Resilience), kJ/m3 310
250
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 25
18
Strength to Weight: Bending, points 22
18
Thermal Diffusivity, mm2/s 4.0
10
Thermal Shock Resistance, points 15
15

Alloy Composition

Boron (B), % 0
0.00050 to 0.0030
Carbon (C), % 0.050 to 0.1
0.28 to 0.33
Cerium (Ce), % 0.030 to 0.080
0
Chromium (Cr), % 20 to 22
0.3 to 0.5
Iron (Fe), % 62.8 to 68.4
97 to 98.1
Manganese (Mn), % 0 to 0.8
0.75 to 1.0
Molybdenum (Mo), % 0
0.080 to 0.15
Nickel (Ni), % 10 to 12
0.3 to 0.6
Nitrogen (N), % 0.14 to 0.2
0
Phosphorus (P), % 0 to 0.040
0 to 0.035
Silicon (Si), % 1.4 to 2.0
0.15 to 0.35
Sulfur (S), % 0 to 0.030
0 to 0.040