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EN 1.4317 Stainless Steel vs. EN 1.4021 Stainless Steel

Both EN 1.4317 stainless steel and EN 1.4021 stainless steel are iron alloys. They have a very high 95% of their average alloy composition in common. There are 31 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 1.4317 stainless steel and the bottom bar is EN 1.4021 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 17
11 to 17
Fatigue Strength, MPa 380
240 to 380
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 76
76
Tensile Strength: Ultimate (UTS), MPa 860
630 to 880
Tensile Strength: Yield (Proof), MPa 630
390 to 670

Thermal Properties

Latent Heat of Fusion, J/g 280
270
Maximum Temperature: Corrosion, °C 390
390
Maximum Temperature: Mechanical, °C 770
760
Melting Completion (Liquidus), °C 1440
1440
Melting Onset (Solidus), °C 1400
1400
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 26
30
Thermal Expansion, µm/m-K 11
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.7
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 3.2
3.3

Otherwise Unclassified Properties

Base Metal Price, % relative 10
7.0
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 2.4
1.9
Embodied Energy, MJ/kg 33
27
Embodied Water, L/kg 110
100

Common Calculations

PREN (Pitting Resistance) 14
13
Resilience: Ultimate (Unit Rupture Work), MJ/m3 130
88 to 110
Resilience: Unit (Modulus of Resilience), kJ/m3 1010
400 to 1160
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 31
23 to 31
Strength to Weight: Bending, points 26
21 to 26
Thermal Diffusivity, mm2/s 7.0
8.1
Thermal Shock Resistance, points 30
22 to 31

Alloy Composition

Carbon (C), % 0 to 0.060
0.16 to 0.25
Chromium (Cr), % 12 to 13.5
12 to 14
Iron (Fe), % 78.7 to 84.5
83.2 to 87.8
Manganese (Mn), % 0 to 1.0
0 to 1.5
Molybdenum (Mo), % 0 to 0.7
0
Nickel (Ni), % 3.5 to 5.0
0
Phosphorus (P), % 0 to 0.035
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.025
0 to 0.015