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EN 1.4640 Stainless Steel vs. EN 1.4903 Stainless Steel

Both EN 1.4640 stainless steel and EN 1.4903 stainless steel are iron alloys. They have 80% 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 1.4640 stainless steel and the bottom bar is EN 1.4903 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 51
20 to 21
Fatigue Strength, MPa 230 to 250
320 to 330
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
75
Shear Strength, MPa 440 to 460
420
Tensile Strength: Ultimate (UTS), MPa 620 to 650
670 to 680
Tensile Strength: Yield (Proof), MPa 240 to 260
500

Thermal Properties

Latent Heat of Fusion, J/g 280
270
Maximum Temperature: Corrosion, °C 420
380
Maximum Temperature: Mechanical, °C 930
650
Melting Completion (Liquidus), °C 1420
1460
Melting Onset (Solidus), °C 1380
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 15
26
Thermal Expansion, µm/m-K 16
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
3.4
Electrical Conductivity: Equal Weight (Specific), % IACS 2.7
4.0

Otherwise Unclassified Properties

Base Metal Price, % relative 14
7.0
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 2.8
2.6
Embodied Energy, MJ/kg 40
36
Embodied Water, L/kg 150
88

Common Calculations

PREN (Pitting Resistance) 20
13
Resilience: Ultimate (Unit Rupture Work), MJ/m3 250 to 260
120 to 130
Resilience: Unit (Modulus of Resilience), kJ/m3 150 to 170
650
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 22 to 23
24
Strength to Weight: Bending, points 21
22
Thermal Diffusivity, mm2/s 4.0
7.0
Thermal Shock Resistance, points 14 to 15
23

Alloy Composition

Aluminum (Al), % 0
0 to 0.040
Carbon (C), % 0.030 to 0.080
0.080 to 0.12
Chromium (Cr), % 18 to 19
8.0 to 9.5
Copper (Cu), % 1.3 to 2.0
0 to 0.3
Iron (Fe), % 67.4 to 73.6
87.1 to 90.5
Manganese (Mn), % 1.5 to 4.0
0.3 to 0.6
Molybdenum (Mo), % 0
0.85 to 1.1
Nickel (Ni), % 5.5 to 6.9
0 to 0.4
Niobium (Nb), % 0
0.060 to 0.1
Nitrogen (N), % 0.030 to 0.11
0.030 to 0.070
Phosphorus (P), % 0 to 0.045
0 to 0.025
Silicon (Si), % 0 to 0.5
0 to 0.5
Sulfur (S), % 0 to 0.015
0 to 0.015
Vanadium (V), % 0
0.18 to 0.25