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EN 1.4515 Stainless Steel vs. EN 1.4438 Stainless Steel

Both EN 1.4515 stainless steel and EN 1.4438 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 1.4515 stainless steel and the bottom bar is EN 1.4438 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 25
41
Fatigue Strength, MPa 380
220
Impact Strength: V-Notched Charpy, J 67
90
Poisson's Ratio 0.27
0.28
Shear Modulus, GPa 80
79
Tensile Strength: Ultimate (UTS), MPa 730
620
Tensile Strength: Yield (Proof), MPa 550
250

Thermal Properties

Latent Heat of Fusion, J/g 300
290
Maximum Temperature: Corrosion, °C 450
420
Maximum Temperature: Mechanical, °C 1100
1000
Melting Completion (Liquidus), °C 1440
1450
Melting Onset (Solidus), °C 1390
1400
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 16
14
Thermal Expansion, µm/m-K 13
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
2.3

Otherwise Unclassified Properties

Base Metal Price, % relative 19
22
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 3.8
4.4
Embodied Energy, MJ/kg 53
60
Embodied Water, L/kg 180
160

Common Calculations

PREN (Pitting Resistance) 38
31
Resilience: Ultimate (Unit Rupture Work), MJ/m3 170
200
Resilience: Unit (Modulus of Resilience), kJ/m3 730
150
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 26
22
Strength to Weight: Bending, points 23
20
Thermal Diffusivity, mm2/s 4.3
3.7
Thermal Shock Resistance, points 20
14

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.030
Chromium (Cr), % 24.5 to 26.5
17.5 to 19.5
Copper (Cu), % 0.8 to 1.3
0
Iron (Fe), % 58.4 to 66.6
57.3 to 66.5
Manganese (Mn), % 0 to 2.0
0 to 2.0
Molybdenum (Mo), % 2.5 to 3.5
3.0 to 4.0
Nickel (Ni), % 5.5 to 7.0
13 to 16
Nitrogen (N), % 0.12 to 0.25
0 to 0.1
Phosphorus (P), % 0 to 0.030
0 to 0.045
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.020
0 to 0.015