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EN 1.4621 Stainless Steel vs. S44625 Stainless Steel

Both EN 1.4621 stainless steel and S44625 stainless steel are iron alloys. They have a moderately high 93% of their average alloy composition in common.

For each property being compared, the top bar is EN 1.4621 stainless steel and the bottom bar is S44625 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 25
22
Fatigue Strength, MPa 190
240
Poisson's Ratio 0.27
0.27
Shear Modulus, GPa 78
80
Shear Strength, MPa 320
370
Tensile Strength: Ultimate (UTS), MPa 500
590
Tensile Strength: Yield (Proof), MPa 270
360

Thermal Properties

Latent Heat of Fusion, J/g 290
290
Maximum Temperature: Corrosion, °C 510
450
Maximum Temperature: Mechanical, °C 970
1100
Melting Completion (Liquidus), °C 1440
1440
Melting Onset (Solidus), °C 1390
1400
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 21
17
Thermal Expansion, µm/m-K 11
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.6
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 3.1
2.6

Otherwise Unclassified Properties

Base Metal Price, % relative 14
14
Density, g/cm3 7.7
7.7
Embodied Carbon, kg CO2/kg material 2.8
2.8
Embodied Energy, MJ/kg 41
39
Embodied Water, L/kg 140
160

Common Calculations

PREN (Pitting Resistance) 21
30
Resilience: Ultimate (Unit Rupture Work), MJ/m3 110
110
Resilience: Unit (Modulus of Resilience), kJ/m3 190
310
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 18
21
Strength to Weight: Bending, points 18
20
Thermal Diffusivity, mm2/s 5.7
4.6
Thermal Shock Resistance, points 17
19

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.010
Chromium (Cr), % 20 to 21.5
25 to 27.5
Copper (Cu), % 0.1 to 1.0
0 to 0.2
Iron (Fe), % 74.4 to 79.7
69.4 to 74.3
Manganese (Mn), % 0 to 1.0
0 to 0.4
Molybdenum (Mo), % 0
0.75 to 1.5
Nickel (Ni), % 0
0 to 0.5
Niobium (Nb), % 0.2 to 1.0
0
Nitrogen (N), % 0 to 0.030
0 to 0.015
Phosphorus (P), % 0 to 0.040
0 to 0.020
Silicon (Si), % 0 to 1.0
0 to 0.4
Sulfur (S), % 0 to 0.015
0 to 0.020