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S21640 Stainless Steel vs. Grade M30C Nickel

S21640 stainless steel belongs to the iron alloys classification, while grade M30C 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 S21640 stainless steel and the bottom bar is grade M30C nickel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
160
Elongation at Break, % 46
29
Fatigue Strength, MPa 320
170
Poisson's Ratio 0.28
0.32
Shear Modulus, GPa 78
61
Tensile Strength: Ultimate (UTS), MPa 740
510
Tensile Strength: Yield (Proof), MPa 350
250

Thermal Properties

Latent Heat of Fusion, J/g 290
290
Maximum Temperature: Mechanical, °C 940
900
Melting Completion (Liquidus), °C 1430
1290
Melting Onset (Solidus), °C 1380
1240
Specific Heat Capacity, J/kg-K 480
430
Thermal Conductivity, W/m-K 15
22
Thermal Expansion, µm/m-K 17
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
3.3
Electrical Conductivity: Equal Weight (Specific), % IACS 2.8
3.4

Otherwise Unclassified Properties

Base Metal Price, % relative 17
60
Density, g/cm3 7.7
8.8
Embodied Carbon, kg CO2/kg material 3.6
9.5
Embodied Energy, MJ/kg 51
140
Embodied Water, L/kg 150
250

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 280
120
Resilience: Unit (Modulus of Resilience), kJ/m3 300
200
Stiffness to Weight: Axial, points 14
10
Stiffness to Weight: Bending, points 25
21
Strength to Weight: Axial, points 27
16
Strength to Weight: Bending, points 23
16
Thermal Diffusivity, mm2/s 4.0
5.7
Thermal Shock Resistance, points 16
18

Alloy Composition

Carbon (C), % 0 to 0.080
0 to 0.3
Chromium (Cr), % 17.5 to 19.5
0
Copper (Cu), % 0
26 to 33
Iron (Fe), % 63 to 74.3
0 to 3.5
Manganese (Mn), % 3.5 to 6.5
0 to 1.5
Molybdenum (Mo), % 0.5 to 2.0
0
Nickel (Ni), % 4.0 to 6.5
56.6 to 72
Niobium (Nb), % 0.1 to 1.0
1.0 to 3.0
Nitrogen (N), % 0.080 to 0.3
0
Phosphorus (P), % 0 to 0.060
0 to 0.030
Silicon (Si), % 0 to 1.0
1.0 to 2.0
Sulfur (S), % 0 to 0.030
0 to 0.030