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EN 1.4315 Stainless Steel vs. EN 1.4821 Stainless Steel

Both EN 1.4315 stainless steel and EN 1.4821 stainless steel are iron alloys. Both are furnished in the solution annealed (AT) condition. They have a moderately high 93% of their average alloy composition in common. There are 33 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.

For each property being compared, the top bar is EN 1.4315 stainless steel and the bottom bar is EN 1.4821 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 180
200
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 45
18
Fatigue Strength, MPa 290
280
Poisson's Ratio 0.28
0.27
Shear Modulus, GPa 77
79
Shear Strength, MPa 440
450
Tensile Strength: Ultimate (UTS), MPa 630
730
Tensile Strength: Yield (Proof), MPa 310
450

Thermal Properties

Latent Heat of Fusion, J/g 290
310
Maximum Temperature: Corrosion, °C 420
450
Maximum Temperature: Mechanical, °C 960
1100
Melting Completion (Liquidus), °C 1420
1410
Melting Onset (Solidus), °C 1380
1370
Specific Heat Capacity, J/kg-K 480
490
Thermal Conductivity, W/m-K 15
17
Thermal Expansion, µm/m-K 16
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
1.9
Electrical Conductivity: Equal Weight (Specific), % IACS 2.7
2.3

Otherwise Unclassified Properties

Base Metal Price, % relative 15
15
Density, g/cm3 7.8
7.6
Embodied Carbon, kg CO2/kg material 3.0
2.9
Embodied Energy, MJ/kg 43
41
Embodied Water, L/kg 150
160

Common Calculations

PREN (Pitting Resistance) 22
26
Resilience: Ultimate (Unit Rupture Work), MJ/m3 240
110
Resilience: Unit (Modulus of Resilience), kJ/m3 240
500
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 25
26
Strength to Weight: Axial, points 22
26
Strength to Weight: Bending, points 21
23
Thermal Diffusivity, mm2/s 4.0
4.6
Thermal Shock Resistance, points 14
21

Alloy Composition

Carbon (C), % 0 to 0.060
0.1 to 0.2
Chromium (Cr), % 18 to 20
24.5 to 26.5
Iron (Fe), % 65.7 to 73.9
64.2 to 71.1
Manganese (Mn), % 0 to 2.0
0 to 2.0
Nickel (Ni), % 8.0 to 11
3.5 to 5.5
Nitrogen (N), % 0.12 to 0.22
0 to 0.1
Phosphorus (P), % 0 to 0.045
0 to 0.040
Silicon (Si), % 0 to 1.0
0.8 to 1.5
Sulfur (S), % 0 to 0.015
0 to 0.015