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EN 1.4818 Stainless Steel vs. EN 1.4887 Stainless Steel

Both EN 1.4818 stainless steel and EN 1.4887 stainless steel are iron alloys. Both are furnished in the solution annealed (AT) condition. They have 71% of their average alloy composition in common.

For each property being compared, the top bar is EN 1.4818 stainless steel and the bottom bar is EN 1.4887 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 180
170
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 40
45
Fatigue Strength, MPa 280
280
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
76
Shear Strength, MPa 480
400
Tensile Strength: Ultimate (UTS), MPa 700
580
Tensile Strength: Yield (Proof), MPa 330
300

Thermal Properties

Latent Heat of Fusion, J/g 300
320
Maximum Temperature: Corrosion, °C 420
600
Maximum Temperature: Mechanical, °C 1050
1100
Melting Completion (Liquidus), °C 1410
1390
Melting Onset (Solidus), °C 1370
1350
Specific Heat Capacity, J/kg-K 490
480
Thermal Conductivity, W/m-K 17
12
Thermal Expansion, µm/m-K 17
15

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
1.7
Electrical Conductivity: Equal Weight (Specific), % IACS 2.4
1.9

Otherwise Unclassified Properties

Base Metal Price, % relative 16
39
Density, g/cm3 7.7
8.0
Embodied Carbon, kg CO2/kg material 3.1
6.7
Embodied Energy, MJ/kg 44
96
Embodied Water, L/kg 150
210

Common Calculations

PREN (Pitting Resistance) 22
22
Resilience: Ultimate (Unit Rupture Work), MJ/m3 230
220
Resilience: Unit (Modulus of Resilience), kJ/m3 270
230
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 25
20
Strength to Weight: Bending, points 23
19
Thermal Diffusivity, mm2/s 4.5
3.2
Thermal Shock Resistance, points 15
14

Alloy Composition

Carbon (C), % 0.040 to 0.080
0 to 0.15
Cerium (Ce), % 0.030 to 0.080
0
Chromium (Cr), % 18 to 20
20 to 23
Iron (Fe), % 65.6 to 71.8
34.2 to 45
Manganese (Mn), % 0 to 1.0
0 to 2.0
Nickel (Ni), % 9.0 to 11
33 to 37
Niobium (Nb), % 0
1.0 to 1.5
Nitrogen (N), % 0.12 to 0.2
0 to 0.1
Phosphorus (P), % 0 to 0.045
0 to 0.030
Silicon (Si), % 1.0 to 2.0
1.0 to 2.0
Sulfur (S), % 0 to 0.015
0 to 0.015