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EN 1.4621 Stainless Steel vs. EN 1.7715 Steel

Both EN 1.4621 stainless steel and EN 1.7715 steel are iron alloys. They have 78% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is EN 1.4621 stainless steel and the bottom bar is EN 1.7715 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 25
21
Fatigue Strength, MPa 190
240
Poisson's Ratio 0.27
0.29
Shear Modulus, GPa 78
73
Shear Strength, MPa 320
340
Tensile Strength: Ultimate (UTS), MPa 500
540
Tensile Strength: Yield (Proof), MPa 270
340

Thermal Properties

Latent Heat of Fusion, J/g 290
250
Maximum Temperature: Mechanical, °C 970
420
Melting Completion (Liquidus), °C 1440
1470
Melting Onset (Solidus), °C 1390
1430
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 21
40
Thermal Expansion, µm/m-K 11
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.6
7.3
Electrical Conductivity: Equal Weight (Specific), % IACS 3.1
8.4

Otherwise Unclassified Properties

Base Metal Price, % relative 14
2.9
Density, g/cm3 7.7
7.9
Embodied Carbon, kg CO2/kg material 2.8
2.2
Embodied Energy, MJ/kg 41
30
Embodied Water, L/kg 140
52

Common Calculations

PREN (Pitting Resistance) 21
2.4
Resilience: Ultimate (Unit Rupture Work), MJ/m3 110
99
Resilience: Unit (Modulus of Resilience), kJ/m3 190
320
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 18
19
Strength to Weight: Bending, points 18
19
Thermal Diffusivity, mm2/s 5.7
11
Thermal Shock Resistance, points 17
16

Alloy Composition

Aluminum (Al), % 0
0 to 0.040
Carbon (C), % 0 to 0.030
0.1 to 0.15
Chromium (Cr), % 20 to 21.5
0.3 to 0.6
Copper (Cu), % 0.1 to 1.0
0 to 0.3
Iron (Fe), % 74.4 to 79.7
96.5 to 98.3
Manganese (Mn), % 0 to 1.0
0.4 to 0.7
Molybdenum (Mo), % 0
0.5 to 0.7
Nickel (Ni), % 0
0 to 0.3
Niobium (Nb), % 0.2 to 1.0
0
Nitrogen (N), % 0 to 0.030
0
Phosphorus (P), % 0 to 0.040
0 to 0.025
Silicon (Si), % 0 to 1.0
0.15 to 0.35
Sulfur (S), % 0 to 0.015
0 to 0.010
Vanadium (V), % 0
0.22 to 0.28