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EN 1.4821 Stainless Steel vs. EN 1.4581 Stainless Steel

Both EN 1.4821 stainless steel and EN 1.4581 stainless steel are iron alloys. Both are furnished in the solution annealed (AT) condition. They have a moderately high 91% of their average alloy composition in common. There are 32 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is EN 1.4821 stainless steel and the bottom bar is EN 1.4581 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200
150
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 18
28
Fatigue Strength, MPa 280
150
Poisson's Ratio 0.27
0.28
Shear Modulus, GPa 79
78
Tensile Strength: Ultimate (UTS), MPa 730
510
Tensile Strength: Yield (Proof), MPa 450
210

Thermal Properties

Latent Heat of Fusion, J/g 310
300
Maximum Temperature: Corrosion, °C 450
490
Maximum Temperature: Mechanical, °C 1100
990
Melting Completion (Liquidus), °C 1410
1440
Melting Onset (Solidus), °C 1370
1400
Specific Heat Capacity, J/kg-K 490
470
Thermal Conductivity, W/m-K 17
15
Thermal Expansion, µm/m-K 12
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.9
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 2.3
2.3

Otherwise Unclassified Properties

Base Metal Price, % relative 15
21
Density, g/cm3 7.6
7.8
Embodied Carbon, kg CO2/kg material 2.9
4.2
Embodied Energy, MJ/kg 41
59
Embodied Water, L/kg 160
160

Common Calculations

PREN (Pitting Resistance) 26
26
Resilience: Ultimate (Unit Rupture Work), MJ/m3 110
120
Resilience: Unit (Modulus of Resilience), kJ/m3 500
110
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 26
25
Strength to Weight: Axial, points 26
18
Strength to Weight: Bending, points 23
18
Thermal Diffusivity, mm2/s 4.6
3.9
Thermal Shock Resistance, points 21
12

Alloy Composition

Carbon (C), % 0.1 to 0.2
0 to 0.070
Chromium (Cr), % 24.5 to 26.5
18 to 20
Iron (Fe), % 64.2 to 71.1
61.4 to 71
Manganese (Mn), % 0 to 2.0
0 to 1.5
Molybdenum (Mo), % 0
2.0 to 2.5
Nickel (Ni), % 3.5 to 5.5
9.0 to 12
Niobium (Nb), % 0
0 to 1.0
Nitrogen (N), % 0 to 0.1
0
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0.8 to 1.5
0 to 1.5
Sulfur (S), % 0 to 0.015
0 to 0.030