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S21904 Stainless Steel vs. EN 1.4887 Stainless Steel

Both S21904 stainless steel and EN 1.4887 stainless steel are iron alloys. They have 68% 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 1.4887 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 210 to 300
170
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 17 to 51
45
Fatigue Strength, MPa 380 to 550
280
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 78
76
Shear Strength, MPa 510 to 620
400
Tensile Strength: Ultimate (UTS), MPa 700 to 1000
580
Tensile Strength: Yield (Proof), MPa 390 to 910
300

Thermal Properties

Latent Heat of Fusion, J/g 290
320
Maximum Temperature: Corrosion, °C 430
600
Maximum Temperature: Mechanical, °C 980
1100
Melting Completion (Liquidus), °C 1400
1390
Melting Onset (Solidus), °C 1350
1350
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 14
12
Thermal Expansion, µm/m-K 17
15

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.5
1.7
Electrical Conductivity: Equal Weight (Specific), % IACS 2.9
1.9

Otherwise Unclassified Properties

Base Metal Price, % relative 15
39
Density, g/cm3 7.7
8.0
Embodied Carbon, kg CO2/kg material 3.0
6.7
Embodied Energy, MJ/kg 43
96
Embodied Water, L/kg 160
210

Common Calculations

PREN (Pitting Resistance) 25
22
Resilience: Ultimate (Unit Rupture Work), MJ/m3 160 to 310
220
Resilience: Unit (Modulus of Resilience), kJ/m3 380 to 2070
230
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 25 to 36
20
Strength to Weight: Bending, points 23 to 29
19
Thermal Diffusivity, mm2/s 3.8
3.2
Thermal Shock Resistance, points 15 to 21
14

Alloy Composition

Carbon (C), % 0 to 0.040
0 to 0.15
Chromium (Cr), % 19 to 21.5
20 to 23
Iron (Fe), % 59.5 to 67.4
34.2 to 45
Manganese (Mn), % 8.0 to 10
0 to 2.0
Nickel (Ni), % 5.5 to 7.5
33 to 37
Niobium (Nb), % 0
1.0 to 1.5
Nitrogen (N), % 0.15 to 0.4
0 to 0.1
Phosphorus (P), % 0 to 0.045
0 to 0.030
Silicon (Si), % 0 to 1.0
1.0 to 2.0
Sulfur (S), % 0 to 0.030
0 to 0.015