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EN 1.4421 Stainless Steel vs. EN 1.4515 Stainless Steel

Both EN 1.4421 stainless steel and EN 1.4515 stainless steel are iron alloys. They have 85% of their average alloy composition in common.

For each property being compared, the top bar is EN 1.4421 stainless steel and the bottom bar is EN 1.4515 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 11 to 17
25
Fatigue Strength, MPa 380 to 520
380
Impact Strength: V-Notched Charpy, J 30 to 67
67
Poisson's Ratio 0.28
0.27
Shear Modulus, GPa 77
80
Tensile Strength: Ultimate (UTS), MPa 880 to 1100
730
Tensile Strength: Yield (Proof), MPa 620 to 950
550

Thermal Properties

Latent Heat of Fusion, J/g 280
300
Maximum Temperature: Corrosion, °C 410
450
Maximum Temperature: Mechanical, °C 870
1100
Melting Completion (Liquidus), °C 1440
1440
Melting Onset (Solidus), °C 1400
1390
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 16
16
Thermal Expansion, µm/m-K 10
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 12
19
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 2.6
3.8
Embodied Energy, MJ/kg 36
53
Embodied Water, L/kg 130
180

Common Calculations

PREN (Pitting Resistance) 18
38
Resilience: Ultimate (Unit Rupture Work), MJ/m3 120 to 140
170
Resilience: Unit (Modulus of Resilience), kJ/m3 960 to 2270
730
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 31 to 39
26
Strength to Weight: Bending, points 26 to 30
23
Thermal Diffusivity, mm2/s 4.4
4.3
Thermal Shock Resistance, points 31 to 39
20

Alloy Composition

Carbon (C), % 0 to 0.060
0 to 0.030
Chromium (Cr), % 15.5 to 17.5
24.5 to 26.5
Copper (Cu), % 0
0.8 to 1.3
Iron (Fe), % 74.4 to 80.5
58.4 to 66.6
Manganese (Mn), % 0 to 1.0
0 to 2.0
Molybdenum (Mo), % 0 to 0.7
2.5 to 3.5
Nickel (Ni), % 4.0 to 5.5
5.5 to 7.0
Nitrogen (N), % 0
0.12 to 0.25
Phosphorus (P), % 0 to 0.035
0 to 0.030
Silicon (Si), % 0 to 0.8
0 to 1.0
Sulfur (S), % 0 to 0.020
0 to 0.020