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EN 1.4029 Stainless Steel vs. S44625 Stainless Steel

Both EN 1.4029 stainless steel and S44625 stainless steel are iron alloys. They have 85% of their average alloy composition in common.

For each property being compared, the top bar is EN 1.4029 stainless steel and the bottom bar is S44625 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 10 to 20
22
Fatigue Strength, MPa 270 to 400
240
Poisson's Ratio 0.28
0.27
Shear Modulus, GPa 76
80
Shear Strength, MPa 440 to 550
370
Tensile Strength: Ultimate (UTS), MPa 700 to 930
590
Tensile Strength: Yield (Proof), MPa 410 to 740
360

Thermal Properties

Latent Heat of Fusion, J/g 270
290
Maximum Temperature: Corrosion, °C 390
450
Maximum Temperature: Mechanical, °C 750
1100
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 30
17
Thermal Expansion, µm/m-K 10
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.1
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 3.7
2.6

Otherwise Unclassified Properties

Base Metal Price, % relative 7.0
14
Density, g/cm3 7.7
7.7
Embodied Carbon, kg CO2/kg material 2.0
2.8
Embodied Energy, MJ/kg 28
39
Embodied Water, L/kg 100
160

Common Calculations

PREN (Pitting Resistance) 14
30
Resilience: Ultimate (Unit Rupture Work), MJ/m3 89 to 120
110
Resilience: Unit (Modulus of Resilience), kJ/m3 440 to 1410
310
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 25 to 33
21
Strength to Weight: Bending, points 23 to 27
20
Thermal Diffusivity, mm2/s 8.1
4.6
Thermal Shock Resistance, points 26 to 34
19

Alloy Composition

Carbon (C), % 0.25 to 0.32
0 to 0.010
Chromium (Cr), % 12 to 13.5
25 to 27.5
Copper (Cu), % 0
0 to 0.2
Iron (Fe), % 82.8 to 87.6
69.4 to 74.3
Manganese (Mn), % 0 to 1.5
0 to 0.4
Molybdenum (Mo), % 0 to 0.6
0.75 to 1.5
Nickel (Ni), % 0
0 to 0.5
Nitrogen (N), % 0
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), % 0.15 to 0.25
0 to 0.020