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EN 1.4903 Stainless Steel vs. EN 1.3956 Stainless Steel

Both EN 1.4903 stainless steel and EN 1.3956 stainless steel are iron alloys. They have 68% of their average alloy composition in common. There are 27 material properties with values for both materials. Properties with values for just one material (6, 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 EN 1.3956 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 20 to 21
27
Fatigue Strength, MPa 320 to 330
240
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 75
79
Tensile Strength: Ultimate (UTS), MPa 670 to 680
650
Tensile Strength: Yield (Proof), MPa 500
330

Thermal Properties

Latent Heat of Fusion, J/g 270
300
Maximum Temperature: Corrosion, °C 380
460
Maximum Temperature: Mechanical, °C 650
1080
Melting Completion (Liquidus), °C 1460
1420
Melting Onset (Solidus), °C 1420
1380
Specific Heat Capacity, J/kg-K 470
480
Thermal Expansion, µm/m-K 11
13

Otherwise Unclassified Properties

Base Metal Price, % relative 7.0
22
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 2.6
4.8
Embodied Energy, MJ/kg 36
68
Embodied Water, L/kg 88
180

Common Calculations

PREN (Pitting Resistance) 13
34
Resilience: Ultimate (Unit Rupture Work), MJ/m3 120 to 130
150
Resilience: Unit (Modulus of Resilience), kJ/m3 650
270
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 24
23
Strength to Weight: Bending, points 22
21
Thermal Shock Resistance, points 23
18

Alloy Composition

Aluminum (Al), % 0 to 0.040
0
Carbon (C), % 0.080 to 0.12
0 to 0.060
Chromium (Cr), % 8.0 to 9.5
20.5 to 23.5
Copper (Cu), % 0 to 0.3
0
Iron (Fe), % 87.1 to 90.5
51.9 to 62.1
Manganese (Mn), % 0.3 to 0.6
4.0 to 6.0
Molybdenum (Mo), % 0.85 to 1.1
1.5 to 3.0
Nickel (Ni), % 0 to 0.4
11.5 to 13.5
Niobium (Nb), % 0.060 to 0.1
0.1 to 0.3
Nitrogen (N), % 0.030 to 0.070
0.2 to 0.4
Phosphorus (P), % 0 to 0.025
0 to 0.040
Silicon (Si), % 0 to 0.5
0 to 1.0
Sulfur (S), % 0 to 0.015
0 to 0.030
Vanadium (V), % 0.18 to 0.25
0.1 to 0.3