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AISI 202 Stainless Steel vs. S21904 Stainless Steel

Both AISI 202 stainless steel and S21904 stainless steel are iron alloys. They have a very high 96% of their average alloy composition in common.

For each property being compared, the top bar is AISI 202 stainless steel and the bottom bar is S21904 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 210 to 300
210 to 300
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 14 to 45
17 to 51
Fatigue Strength, MPa 290 to 330
380 to 550
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
78
Shear Strength, MPa 490 to 590
510 to 620
Tensile Strength: Ultimate (UTS), MPa 700 to 980
700 to 1000
Tensile Strength: Yield (Proof), MPa 310 to 580
390 to 910

Thermal Properties

Latent Heat of Fusion, J/g 290
290
Maximum Temperature: Corrosion, °C 410
430
Maximum Temperature: Mechanical, °C 910
980
Melting Completion (Liquidus), °C 1400
1400
Melting Onset (Solidus), °C 1360
1350
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 15
14
Thermal Expansion, µm/m-K 17
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
2.5
Electrical Conductivity: Equal Weight (Specific), % IACS 2.9
2.9

Otherwise Unclassified Properties

Base Metal Price, % relative 13
15
Density, g/cm3 7.7
7.7
Embodied Carbon, kg CO2/kg material 2.8
3.0
Embodied Energy, MJ/kg 40
43
Embodied Water, L/kg 150
160

Common Calculations

PREN (Pitting Resistance) 20
25
Resilience: Ultimate (Unit Rupture Work), MJ/m3 120 to 260
160 to 310
Resilience: Unit (Modulus of Resilience), kJ/m3 250 to 840
380 to 2070
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 25 to 35
25 to 36
Strength to Weight: Bending, points 23 to 29
23 to 29
Thermal Diffusivity, mm2/s 4.0
3.8
Thermal Shock Resistance, points 15 to 21
15 to 21

Alloy Composition

Carbon (C), % 0 to 0.15
0 to 0.040
Chromium (Cr), % 17 to 19
19 to 21.5
Iron (Fe), % 63.5 to 71.5
59.5 to 67.4
Manganese (Mn), % 7.5 to 10
8.0 to 10
Nickel (Ni), % 4.0 to 6.0
5.5 to 7.5
Nitrogen (N), % 0 to 0.25
0.15 to 0.4
Phosphorus (P), % 0 to 0.060
0 to 0.045
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.030

Comparable Variants