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S21640 Stainless Steel vs. EN 1.4470 Stainless Steel

Both S21640 stainless steel and EN 1.4470 stainless steel are iron alloys. They have a moderately high 95% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is S21640 stainless steel and the bottom bar is EN 1.4470 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 46
23
Fatigue Strength, MPa 320
320
Poisson's Ratio 0.28
0.27
Shear Modulus, GPa 78
80
Tensile Strength: Ultimate (UTS), MPa 740
680
Tensile Strength: Yield (Proof), MPa 350
480

Thermal Properties

Latent Heat of Fusion, J/g 290
300
Maximum Temperature: Corrosion, °C 490
430
Maximum Temperature: Mechanical, °C 940
1060
Melting Completion (Liquidus), °C 1430
1450
Melting Onset (Solidus), °C 1380
1400
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 15
18
Thermal Expansion, µm/m-K 17
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 2.8
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 17
17
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 3.6
3.6
Embodied Energy, MJ/kg 51
49
Embodied Water, L/kg 150
160

Common Calculations

PREN (Pitting Resistance) 26
34
Resilience: Ultimate (Unit Rupture Work), MJ/m3 280
140
Resilience: Unit (Modulus of Resilience), kJ/m3 300
570
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 27
24
Strength to Weight: Bending, points 23
22
Thermal Diffusivity, mm2/s 4.0
4.8
Thermal Shock Resistance, points 16
18

Alloy Composition

Carbon (C), % 0 to 0.080
0 to 0.030
Chromium (Cr), % 17.5 to 19.5
21 to 23
Iron (Fe), % 63 to 74.3
63.7 to 71.9
Manganese (Mn), % 3.5 to 6.5
0 to 2.0
Molybdenum (Mo), % 0.5 to 2.0
2.5 to 3.5
Nickel (Ni), % 4.0 to 6.5
4.5 to 6.5
Niobium (Nb), % 0.1 to 1.0
0
Nitrogen (N), % 0.080 to 0.3
0.12 to 0.2
Phosphorus (P), % 0 to 0.060
0 to 0.035
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.025