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EN 1.4417 Stainless Steel vs. S81921 Stainless Steel

Both EN 1.4417 stainless steel and S81921 stainless steel are iron alloys. They have 88% of their average alloy composition in common. There are 31 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 1.4417 stainless steel and the bottom bar is S81921 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 25
29
Fatigue Strength, MPa 380
370
Poisson's Ratio 0.27
0.28
Shear Modulus, GPa 81
79
Tensile Strength: Ultimate (UTS), MPa 730
710
Tensile Strength: Yield (Proof), MPa 550
500

Thermal Properties

Latent Heat of Fusion, J/g 300
290
Maximum Temperature: Corrosion, °C 450
430
Maximum Temperature: Mechanical, °C 1100
990
Melting Completion (Liquidus), °C 1450
1430
Melting Onset (Solidus), °C 1410
1390
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 17
15
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 21
14
Density, g/cm3 7.9
7.7
Embodied Carbon, kg CO2/kg material 4.1
2.9
Embodied Energy, MJ/kg 57
41
Embodied Water, L/kg 180
150

Common Calculations

PREN (Pitting Resistance) 41
28
Resilience: Ultimate (Unit Rupture Work), MJ/m3 170
180
Resilience: Unit (Modulus of Resilience), kJ/m3 730
630
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 26
25
Strength to Weight: Bending, points 23
23
Thermal Diffusivity, mm2/s 4.6
4.0
Thermal Shock Resistance, points 20
20

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.030
Chromium (Cr), % 24 to 26
19 to 22
Copper (Cu), % 0 to 1.0
0
Iron (Fe), % 56.7 to 66.9
66.7 to 75.9
Manganese (Mn), % 0 to 1.5
2.0 to 4.0
Molybdenum (Mo), % 3.0 to 4.0
1.0 to 2.0
Nickel (Ni), % 6.0 to 8.5
2.0 to 4.0
Nitrogen (N), % 0.15 to 0.25
0.14 to 0.2
Phosphorus (P), % 0 to 0.030
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.020
0 to 0.030
Tungsten (W), % 0 to 1.0
0