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EN 1.3956 Stainless Steel vs. EN 1.4020 Stainless Steel

Both EN 1.3956 stainless steel and EN 1.4020 stainless steel are iron alloys. They have 82% of their average alloy composition in common. There are 27 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 1.3956 stainless steel and the bottom bar is EN 1.4020 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 27
13 to 34
Fatigue Strength, MPa 240
340 to 540
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 79
77
Tensile Strength: Ultimate (UTS), MPa 650
770 to 1130
Tensile Strength: Yield (Proof), MPa 330
430 to 950

Thermal Properties

Latent Heat of Fusion, J/g 300
280
Maximum Temperature: Corrosion, °C 460
410
Maximum Temperature: Mechanical, °C 1080
890
Melting Completion (Liquidus), °C 1420
1390
Melting Onset (Solidus), °C 1380
1350
Specific Heat Capacity, J/kg-K 480
480
Thermal Expansion, µm/m-K 13
17

Otherwise Unclassified Properties

Base Metal Price, % relative 22
11
Density, g/cm3 7.8
7.6
Embodied Carbon, kg CO2/kg material 4.8
2.5
Embodied Energy, MJ/kg 68
37
Embodied Water, L/kg 180
150

Common Calculations

PREN (Pitting Resistance) 34
23
Resilience: Ultimate (Unit Rupture Work), MJ/m3 150
140 to 220
Resilience: Unit (Modulus of Resilience), kJ/m3 270
460 to 2290
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 23
28 to 41
Strength to Weight: Bending, points 21
25 to 32
Thermal Shock Resistance, points 18
16 to 23

Alloy Composition

Carbon (C), % 0 to 0.060
0 to 0.15
Chromium (Cr), % 20.5 to 23.5
16.5 to 19
Iron (Fe), % 51.9 to 62.1
62.8 to 71.8
Manganese (Mn), % 4.0 to 6.0
11 to 14
Molybdenum (Mo), % 1.5 to 3.0
0
Nickel (Ni), % 11.5 to 13.5
0.5 to 2.5
Niobium (Nb), % 0.1 to 0.3
0
Nitrogen (N), % 0.2 to 0.4
0.2 to 0.45
Phosphorus (P), % 0 to 0.040
0 to 0.045
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.030
Vanadium (V), % 0.1 to 0.3
0