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AISI 304 Stainless Steel vs. S38815 Stainless Steel

Both AISI 304 stainless steel and S38815 stainless steel are iron alloys. They have 86% of their average alloy composition in common. There are 29 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is AISI 304 stainless steel and the bottom bar is S38815 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 170 to 360
190
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 8.0 to 43
34
Fatigue Strength, MPa 210 to 440
230
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
74
Shear Strength, MPa 400 to 690
410
Tensile Strength: Ultimate (UTS), MPa 580 to 1180
610
Tensile Strength: Yield (Proof), MPa 230 to 860
290

Thermal Properties

Latent Heat of Fusion, J/g 290
370
Maximum Temperature: Corrosion, °C 420
400
Maximum Temperature: Mechanical, °C 710
860
Melting Completion (Liquidus), °C 1450
1360
Melting Onset (Solidus), °C 1400
1310
Specific Heat Capacity, J/kg-K 480
500
Thermal Expansion, µm/m-K 17
15

Otherwise Unclassified Properties

Base Metal Price, % relative 15
19
Density, g/cm3 7.8
7.5
Embodied Carbon, kg CO2/kg material 3.0
3.8
Embodied Energy, MJ/kg 43
54
Embodied Water, L/kg 150
140

Common Calculations

PREN (Pitting Resistance) 20
18
Resilience: Ultimate (Unit Rupture Work), MJ/m3 86 to 250
170
Resilience: Unit (Modulus of Resilience), kJ/m3 140 to 1870
220
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 21 to 42
22
Strength to Weight: Bending, points 20 to 32
21
Thermal Shock Resistance, points 12 to 25
15

Alloy Composition

Aluminum (Al), % 0
0 to 0.3
Carbon (C), % 0 to 0.080
0 to 0.030
Chromium (Cr), % 18 to 20
13 to 15
Copper (Cu), % 0
0.75 to 1.5
Iron (Fe), % 66.5 to 74
56.1 to 67
Manganese (Mn), % 0 to 2.0
0 to 2.0
Molybdenum (Mo), % 0
0.75 to 1.5
Nickel (Ni), % 8.0 to 10.5
13 to 17
Nitrogen (N), % 0 to 0.1
0
Phosphorus (P), % 0 to 0.045
0 to 0.040
Silicon (Si), % 0 to 0.75
5.5 to 6.5
Sulfur (S), % 0 to 0.030
0 to 0.020