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EN 1.4125 Stainless Steel vs. AISI 303 Stainless Steel

Both EN 1.4125 stainless steel and AISI 303 stainless steel are iron alloys. They have 89% of their average alloy composition in common. There are 33 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.

For each property being compared, the top bar is EN 1.4125 stainless steel and the bottom bar is AISI 303 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 250
170 to 210
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 19
40 to 51
Fatigue Strength, MPa 300
230 to 360
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
77
Shear Strength, MPa 500
430 to 470
Tensile Strength: Ultimate (UTS), MPa 800
600 to 690
Tensile Strength: Yield (Proof), MPa 470
230 to 420

Thermal Properties

Latent Heat of Fusion, J/g 280
290
Maximum Temperature: Corrosion, °C 390
410
Maximum Temperature: Mechanical, °C 870
930
Melting Completion (Liquidus), °C 1430
1450
Melting Onset (Solidus), °C 1390
1400
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 15
16
Thermal Expansion, µm/m-K 10
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
2.8

Otherwise Unclassified Properties

Base Metal Price, % relative 9.0
15
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 2.3
3.0
Embodied Energy, MJ/kg 32
42
Embodied Water, L/kg 120
140

Common Calculations

PREN (Pitting Resistance) 19
18
Resilience: Ultimate (Unit Rupture Work), MJ/m3 130
240
Resilience: Unit (Modulus of Resilience), kJ/m3 570
140 to 440
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 29
21 to 25
Strength to Weight: Bending, points 25
20 to 22
Thermal Diffusivity, mm2/s 4.1
4.4
Thermal Shock Resistance, points 29
13 to 15

Alloy Composition

Carbon (C), % 1.0 to 1.2
0 to 0.15
Chromium (Cr), % 16 to 18
17 to 19
Iron (Fe), % 78 to 82.7
67.3 to 74.9
Manganese (Mn), % 0 to 1.0
0 to 2.0
Molybdenum (Mo), % 0.4 to 0.8
0
Nickel (Ni), % 0
8.0 to 10
Phosphorus (P), % 0 to 0.040
0 to 0.2
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.015
0.15 to 0.35