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EN 1.4125 Stainless Steel vs. AISI 430 Stainless Steel

Both EN 1.4125 stainless steel and AISI 430 stainless steel are iron alloys. Both are furnished in the annealed condition. They have a very high 98% of their average alloy composition in common. There are 33 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 1.4125 stainless steel and the bottom bar is AISI 430 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 250
160
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 19
24
Fatigue Strength, MPa 300
180
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
77
Shear Strength, MPa 500
320
Tensile Strength: Ultimate (UTS), MPa 800
500
Tensile Strength: Yield (Proof), MPa 470
260

Thermal Properties

Latent Heat of Fusion, J/g 280
280
Maximum Temperature: Corrosion, °C 390
410
Maximum Temperature: Mechanical, °C 870
870
Melting Completion (Liquidus), °C 1430
1510
Melting Onset (Solidus), °C 1390
1430
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 15
25
Thermal Expansion, µm/m-K 10
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
3.4

Otherwise Unclassified Properties

Base Metal Price, % relative 9.0
8.5
Density, g/cm3 7.7
7.7
Embodied Carbon, kg CO2/kg material 2.3
2.1
Embodied Energy, MJ/kg 32
30
Embodied Water, L/kg 120
120

Common Calculations

PREN (Pitting Resistance) 19
17
Resilience: Ultimate (Unit Rupture Work), MJ/m3 130
100
Resilience: Unit (Modulus of Resilience), kJ/m3 570
170
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 29
18
Strength to Weight: Bending, points 25
18
Thermal Diffusivity, mm2/s 4.1
6.7
Thermal Shock Resistance, points 29
18

Alloy Composition

Carbon (C), % 1.0 to 1.2
0 to 0.12
Chromium (Cr), % 16 to 18
16 to 18
Iron (Fe), % 78 to 82.7
79.1 to 84
Manganese (Mn), % 0 to 1.0
0 to 1.0
Molybdenum (Mo), % 0.4 to 0.8
0
Nickel (Ni), % 0
0 to 0.75
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.015
0 to 0.030