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S21904 Stainless Steel vs. EN 1.4310 Stainless Steel

Both S21904 stainless steel and EN 1.4310 stainless steel are iron alloys. They have 89% of their average alloy composition in common.

For each property being compared, the top bar is S21904 stainless steel and the bottom bar is EN 1.4310 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 210 to 300
200 to 270
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 17 to 51
14 to 45
Fatigue Strength, MPa 380 to 550
240 to 330
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 78
77
Shear Strength, MPa 510 to 620
510 to 550
Tensile Strength: Ultimate (UTS), MPa 700 to 1000
730 to 900
Tensile Strength: Yield (Proof), MPa 390 to 910
260 to 570

Thermal Properties

Latent Heat of Fusion, J/g 290
290
Maximum Temperature: Corrosion, °C 430
410
Maximum Temperature: Mechanical, °C 980
910
Melting Completion (Liquidus), °C 1400
1420
Melting Onset (Solidus), °C 1350
1380
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 14
15
Thermal Expansion, µm/m-K 17
18

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.5
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 2.9
2.7

Otherwise Unclassified Properties

Base Metal Price, % relative 15
14
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 3.0
2.9
Embodied Energy, MJ/kg 43
42
Embodied Water, L/kg 160
140

Common Calculations

PREN (Pitting Resistance) 25
20
Resilience: Ultimate (Unit Rupture Work), MJ/m3 160 to 310
110 to 260
Resilience: Unit (Modulus of Resilience), kJ/m3 380 to 2070
170 to 830
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 25 to 36
26 to 32
Strength to Weight: Bending, points 23 to 29
23 to 27
Thermal Diffusivity, mm2/s 3.8
4.0
Thermal Shock Resistance, points 15 to 21
15 to 18

Alloy Composition

Carbon (C), % 0 to 0.040
0.050 to 0.15
Chromium (Cr), % 19 to 21.5
16 to 19
Iron (Fe), % 59.5 to 67.4
66.4 to 78
Manganese (Mn), % 8.0 to 10
0 to 2.0
Molybdenum (Mo), % 0
0 to 0.8
Nickel (Ni), % 5.5 to 7.5
6.0 to 9.5
Nitrogen (N), % 0.15 to 0.4
0 to 0.1
Phosphorus (P), % 0 to 0.045
0 to 0.045
Silicon (Si), % 0 to 1.0
0 to 2.0
Sulfur (S), % 0 to 0.030
0 to 0.015