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S21904 Stainless Steel vs. Grade M30H Nickel

S21904 stainless steel belongs to the iron alloys classification, while grade M30H nickel belongs to the nickel alloys. There are 29 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 S21904 stainless steel and the bottom bar is grade M30H nickel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
160
Elongation at Break, % 17 to 51
11
Fatigue Strength, MPa 380 to 550
230
Poisson's Ratio 0.28
0.32
Shear Modulus, GPa 78
61
Tensile Strength: Ultimate (UTS), MPa 700 to 1000
770
Tensile Strength: Yield (Proof), MPa 390 to 910
470

Thermal Properties

Latent Heat of Fusion, J/g 290
320
Maximum Temperature: Mechanical, °C 980
900
Melting Completion (Liquidus), °C 1400
1250
Melting Onset (Solidus), °C 1350
1200
Specific Heat Capacity, J/kg-K 480
440
Thermal Conductivity, W/m-K 14
22
Thermal Expansion, µm/m-K 17
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.5
3.3
Electrical Conductivity: Equal Weight (Specific), % IACS 2.9
3.4

Otherwise Unclassified Properties

Base Metal Price, % relative 15
50
Density, g/cm3 7.7
8.6
Embodied Carbon, kg CO2/kg material 3.0
7.7
Embodied Energy, MJ/kg 43
110
Embodied Water, L/kg 160
250

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 160 to 310
75
Resilience: Unit (Modulus of Resilience), kJ/m3 380 to 2070
700
Stiffness to Weight: Axial, points 14
10
Stiffness to Weight: Bending, points 25
21
Strength to Weight: Axial, points 25 to 36
25
Strength to Weight: Bending, points 23 to 29
22
Thermal Diffusivity, mm2/s 3.8
5.7
Thermal Shock Resistance, points 15 to 21
27

Alloy Composition

Carbon (C), % 0 to 0.040
0 to 0.3
Chromium (Cr), % 19 to 21.5
0
Copper (Cu), % 0
27 to 33
Iron (Fe), % 59.5 to 67.4
0 to 3.5
Manganese (Mn), % 8.0 to 10
0 to 1.5
Nickel (Ni), % 5.5 to 7.5
57.9 to 70.3
Nitrogen (N), % 0.15 to 0.4
0
Phosphorus (P), % 0 to 0.045
0 to 0.030
Silicon (Si), % 0 to 1.0
2.7 to 3.7
Sulfur (S), % 0 to 0.030
0 to 0.030