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EN 1.4878 Stainless Steel vs. EN 1.4864 Stainless Steel

Both EN 1.4878 stainless steel and EN 1.4864 stainless steel are iron alloys. Both are furnished in the solution annealed (AT) condition. They have 74% of their average alloy composition in common.

For each property being compared, the top bar is EN 1.4878 stainless steel and the bottom bar is EN 1.4864 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 180
190
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 45
33
Fatigue Strength, MPa 190
200
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
75
Shear Strength, MPa 430
430
Tensile Strength: Ultimate (UTS), MPa 610
650
Tensile Strength: Yield (Proof), MPa 210
260

Thermal Properties

Latent Heat of Fusion, J/g 290
310
Maximum Temperature: Corrosion, °C 490
410
Maximum Temperature: Mechanical, °C 850
1100
Melting Completion (Liquidus), °C 1430
1390
Melting Onset (Solidus), °C 1380
1340
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 15
13
Thermal Expansion, µm/m-K 17
14

Electrical Properties

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

Otherwise Unclassified Properties

Base Metal Price, % relative 16
30
Density, g/cm3 7.8
8.0
Embodied Carbon, kg CO2/kg material 3.2
5.3
Embodied Energy, MJ/kg 46
75
Embodied Water, L/kg 140
180

Common Calculations

PREN (Pitting Resistance) 18
17
Resilience: Ultimate (Unit Rupture Work), MJ/m3 210
170
Resilience: Unit (Modulus of Resilience), kJ/m3 120
170
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 22
23
Strength to Weight: Bending, points 20
21
Thermal Diffusivity, mm2/s 4.0
3.3
Thermal Shock Resistance, points 13
17

Alloy Composition

Carbon (C), % 0 to 0.1
0 to 0.15
Chromium (Cr), % 17 to 19
15 to 17
Iron (Fe), % 65 to 74
41.7 to 51
Manganese (Mn), % 0 to 2.0
0 to 2.0
Nickel (Ni), % 9.0 to 12
33 to 37
Nitrogen (N), % 0
0 to 0.1
Phosphorus (P), % 0 to 0.045
0 to 0.045
Silicon (Si), % 0 to 1.0
1.0 to 2.0
Sulfur (S), % 0 to 0.015
0 to 0.015
Titanium (Ti), % 0 to 0.8
0