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EN 1.4887 Stainless Steel vs. S21640 Stainless Steel

Both EN 1.4887 stainless steel and S21640 stainless steel are iron alloys. They have 66% of their average alloy composition in common.

For each property being compared, the top bar is EN 1.4887 stainless steel and the bottom bar is S21640 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 170
230
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 45
46
Fatigue Strength, MPa 280
320
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 76
78
Shear Strength, MPa 400
520
Tensile Strength: Ultimate (UTS), MPa 580
740
Tensile Strength: Yield (Proof), MPa 300
350

Thermal Properties

Latent Heat of Fusion, J/g 320
290
Maximum Temperature: Corrosion, °C 600
490
Maximum Temperature: Mechanical, °C 1100
940
Melting Completion (Liquidus), °C 1390
1430
Melting Onset (Solidus), °C 1350
1380
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 12
15
Thermal Expansion, µm/m-K 15
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.7
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 1.9
2.8

Otherwise Unclassified Properties

Base Metal Price, % relative 39
17
Density, g/cm3 8.0
7.7
Embodied Carbon, kg CO2/kg material 6.7
3.6
Embodied Energy, MJ/kg 96
51
Embodied Water, L/kg 210
150

Common Calculations

PREN (Pitting Resistance) 22
26
Resilience: Ultimate (Unit Rupture Work), MJ/m3 220
280
Resilience: Unit (Modulus of Resilience), kJ/m3 230
300
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 20
27
Strength to Weight: Bending, points 19
23
Thermal Diffusivity, mm2/s 3.2
4.0
Thermal Shock Resistance, points 14
16

Alloy Composition

Carbon (C), % 0 to 0.15
0 to 0.080
Chromium (Cr), % 20 to 23
17.5 to 19.5
Iron (Fe), % 34.2 to 45
63 to 74.3
Manganese (Mn), % 0 to 2.0
3.5 to 6.5
Molybdenum (Mo), % 0
0.5 to 2.0
Nickel (Ni), % 33 to 37
4.0 to 6.5
Niobium (Nb), % 1.0 to 1.5
0.1 to 1.0
Nitrogen (N), % 0 to 0.1
0.080 to 0.3
Phosphorus (P), % 0 to 0.030
0 to 0.060
Silicon (Si), % 1.0 to 2.0
0 to 1.0
Sulfur (S), % 0 to 0.015
0 to 0.030