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EN 1.4887 Stainless Steel vs. EN 1.4640 Stainless Steel

Both EN 1.4887 stainless steel and EN 1.4640 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 EN 1.4640 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 170
190 to 200
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 45
51
Fatigue Strength, MPa 280
230 to 250
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 76
77
Shear Strength, MPa 400
440 to 460
Tensile Strength: Ultimate (UTS), MPa 580
620 to 650
Tensile Strength: Yield (Proof), MPa 300
240 to 260

Thermal Properties

Latent Heat of Fusion, J/g 320
280
Maximum Temperature: Corrosion, °C 600
420
Maximum Temperature: Mechanical, °C 1100
930
Melting Completion (Liquidus), °C 1390
1420
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
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.7
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 1.9
2.7

Otherwise Unclassified Properties

Base Metal Price, % relative 39
14
Density, g/cm3 8.0
7.8
Embodied Carbon, kg CO2/kg material 6.7
2.8
Embodied Energy, MJ/kg 96
40
Embodied Water, L/kg 210
150

Common Calculations

PREN (Pitting Resistance) 22
20
Resilience: Ultimate (Unit Rupture Work), MJ/m3 220
250 to 260
Resilience: Unit (Modulus of Resilience), kJ/m3 230
150 to 170
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 20
22 to 23
Strength to Weight: Bending, points 19
21
Thermal Diffusivity, mm2/s 3.2
4.0
Thermal Shock Resistance, points 14
14 to 15

Alloy Composition

Carbon (C), % 0 to 0.15
0.030 to 0.080
Chromium (Cr), % 20 to 23
18 to 19
Copper (Cu), % 0
1.3 to 2.0
Iron (Fe), % 34.2 to 45
67.4 to 73.6
Manganese (Mn), % 0 to 2.0
1.5 to 4.0
Nickel (Ni), % 33 to 37
5.5 to 6.9
Niobium (Nb), % 1.0 to 1.5
0
Nitrogen (N), % 0 to 0.1
0.030 to 0.11
Phosphorus (P), % 0 to 0.030
0 to 0.045
Silicon (Si), % 1.0 to 2.0
0 to 0.5
Sulfur (S), % 0 to 0.015
0 to 0.015