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S30415 Stainless Steel vs. S40975 Stainless Steel

Both S30415 stainless steel and S40975 stainless steel are iron alloys. Both are furnished in the annealed condition. They have 83% of their average alloy composition in common.

For each property being compared, the top bar is S30415 stainless steel and the bottom bar is S40975 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190
170
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 45
22
Fatigue Strength, MPa 300
210
Poisson's Ratio 0.28
0.28
Rockwell B Hardness 84
81
Shear Modulus, GPa 77
75
Shear Strength, MPa 470
290
Tensile Strength: Ultimate (UTS), MPa 670
460
Tensile Strength: Yield (Proof), MPa 330
310

Thermal Properties

Latent Heat of Fusion, J/g 300
270
Maximum Temperature: Corrosion, °C 420
450
Maximum Temperature: Mechanical, °C 940
710
Melting Completion (Liquidus), °C 1410
1450
Melting Onset (Solidus), °C 1370
1400
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 21
26
Thermal Expansion, µm/m-K 17
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 2.4
3.3

Otherwise Unclassified Properties

Base Metal Price, % relative 15
6.5
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 3.1
2.0
Embodied Energy, MJ/kg 43
28
Embodied Water, L/kg 140
95

Common Calculations

PREN (Pitting Resistance) 21
11
Resilience: Ultimate (Unit Rupture Work), MJ/m3 250
93
Resilience: Unit (Modulus of Resilience), kJ/m3 280
250
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 24
17
Strength to Weight: Bending, points 22
17
Thermal Diffusivity, mm2/s 5.6
7.0
Thermal Shock Resistance, points 15
17

Alloy Composition

Carbon (C), % 0.040 to 0.060
0 to 0.030
Cerium (Ce), % 0.030 to 0.080
0
Chromium (Cr), % 18 to 19
10.5 to 11.7
Iron (Fe), % 67.8 to 71.8
84.4 to 89
Manganese (Mn), % 0 to 0.8
0 to 1.0
Nickel (Ni), % 9.0 to 10
0.5 to 1.0
Nitrogen (N), % 0.12 to 0.18
0 to 0.030
Phosphorus (P), % 0 to 0.045
0 to 0.040
Silicon (Si), % 1.0 to 2.0
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.030
Titanium (Ti), % 0
0 to 0.75