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EN 1.4903 Stainless Steel vs. AISI 308 Stainless Steel

Both EN 1.4903 stainless steel and AISI 308 stainless steel are iron alloys. They have 77% of their average alloy composition in common. There are 32 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is EN 1.4903 stainless steel and the bottom bar is AISI 308 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 20 to 21
45
Fatigue Strength, MPa 320 to 330
210
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 75
78
Shear Strength, MPa 420
410
Tensile Strength: Ultimate (UTS), MPa 670 to 680
590
Tensile Strength: Yield (Proof), MPa 500
230

Thermal Properties

Latent Heat of Fusion, J/g 270
290
Maximum Temperature: Corrosion, °C 380
420
Maximum Temperature: Mechanical, °C 650
990
Melting Completion (Liquidus), °C 1460
1420
Melting Onset (Solidus), °C 1420
1380
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 26
15
Thermal Expansion, µm/m-K 11
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.4
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 4.0
2.8

Otherwise Unclassified Properties

Base Metal Price, % relative 7.0
17
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 2.6
3.2
Embodied Energy, MJ/kg 36
46
Embodied Water, L/kg 88
150

Common Calculations

PREN (Pitting Resistance) 13
20
Resilience: Ultimate (Unit Rupture Work), MJ/m3 120 to 130
210
Resilience: Unit (Modulus of Resilience), kJ/m3 650
140
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 24
21
Strength to Weight: Bending, points 22
20
Thermal Diffusivity, mm2/s 7.0
4.1
Thermal Shock Resistance, points 23
13

Alloy Composition

Aluminum (Al), % 0 to 0.040
0
Carbon (C), % 0.080 to 0.12
0 to 0.080
Chromium (Cr), % 8.0 to 9.5
19 to 21
Copper (Cu), % 0 to 0.3
0
Iron (Fe), % 87.1 to 90.5
64.1 to 71
Manganese (Mn), % 0.3 to 0.6
0 to 2.0
Molybdenum (Mo), % 0.85 to 1.1
0
Nickel (Ni), % 0 to 0.4
10 to 12
Niobium (Nb), % 0.060 to 0.1
0
Nitrogen (N), % 0.030 to 0.070
0
Phosphorus (P), % 0 to 0.025
0 to 0.045
Silicon (Si), % 0 to 0.5
0 to 0.75
Sulfur (S), % 0 to 0.015
0 to 0.030
Vanadium (V), % 0.18 to 0.25
0