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S21904 Stainless Steel vs. EN 1.4020 Stainless Steel

Both S21904 stainless steel and EN 1.4020 stainless steel are iron alloys. They have a moderately high 93% of their average alloy composition in common. 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 EN 1.4020 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 210 to 300
190 to 340
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 17 to 51
13 to 34
Fatigue Strength, MPa 380 to 550
340 to 540
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 78
77
Shear Strength, MPa 510 to 620
510 to 680
Tensile Strength: Ultimate (UTS), MPa 700 to 1000
770 to 1130
Tensile Strength: Yield (Proof), MPa 390 to 910
430 to 950

Thermal Properties

Latent Heat of Fusion, J/g 290
280
Maximum Temperature: Corrosion, °C 430
410
Maximum Temperature: Mechanical, °C 980
890
Melting Completion (Liquidus), °C 1400
1390
Melting Onset (Solidus), °C 1350
1350
Specific Heat Capacity, J/kg-K 480
480
Thermal Expansion, µm/m-K 17
17

Otherwise Unclassified Properties

Base Metal Price, % relative 15
11
Density, g/cm3 7.7
7.6
Embodied Carbon, kg CO2/kg material 3.0
2.5
Embodied Energy, MJ/kg 43
37
Embodied Water, L/kg 160
150

Common Calculations

PREN (Pitting Resistance) 25
23
Resilience: Ultimate (Unit Rupture Work), MJ/m3 160 to 310
140 to 220
Resilience: Unit (Modulus of Resilience), kJ/m3 380 to 2070
460 to 2290
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 25 to 36
28 to 41
Strength to Weight: Bending, points 23 to 29
25 to 32
Thermal Shock Resistance, points 15 to 21
16 to 23

Alloy Composition

Carbon (C), % 0 to 0.040
0 to 0.15
Chromium (Cr), % 19 to 21.5
16.5 to 19
Iron (Fe), % 59.5 to 67.4
62.8 to 71.8
Manganese (Mn), % 8.0 to 10
11 to 14
Nickel (Ni), % 5.5 to 7.5
0.5 to 2.5
Nitrogen (N), % 0.15 to 0.4
0.2 to 0.45
Phosphorus (P), % 0 to 0.045
0 to 0.045
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.030