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AISI 201 Stainless Steel vs. EN 1.4125 Stainless Steel

Both AISI 201 stainless steel and EN 1.4125 stainless steel are iron alloys. They have 89% of their average alloy composition in common.

For each property being compared, the top bar is AISI 201 stainless steel and the bottom bar is EN 1.4125 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200 to 440
250
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 4.6 to 51
19
Fatigue Strength, MPa 280 to 600
300
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
77
Shear Strength, MPa 450 to 840
500
Tensile Strength: Ultimate (UTS), MPa 650 to 1450
800
Tensile Strength: Yield (Proof), MPa 300 to 1080
470

Thermal Properties

Latent Heat of Fusion, J/g 280
280
Maximum Temperature: Corrosion, °C 410
390
Maximum Temperature: Mechanical, °C 880
870
Melting Completion (Liquidus), °C 1410
1430
Melting Onset (Solidus), °C 1370
1390
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 15
15
Thermal Expansion, µm/m-K 17
10

Electrical Properties

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

Otherwise Unclassified Properties

Base Metal Price, % relative 12
9.0
Density, g/cm3 7.7
7.7
Embodied Carbon, kg CO2/kg material 2.6
2.3
Embodied Energy, MJ/kg 38
32
Embodied Water, L/kg 140
120

Common Calculations

PREN (Pitting Resistance) 19
19
Resilience: Ultimate (Unit Rupture Work), MJ/m3 61 to 340
130
Resilience: Unit (Modulus of Resilience), kJ/m3 230 to 2970
570
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 23 to 52
29
Strength to Weight: Bending, points 22 to 37
25
Thermal Diffusivity, mm2/s 4.0
4.1
Thermal Shock Resistance, points 14 to 32
29

Alloy Composition

Carbon (C), % 0 to 0.15
1.0 to 1.2
Chromium (Cr), % 16 to 18
16 to 18
Iron (Fe), % 67.5 to 75
78 to 82.7
Manganese (Mn), % 5.5 to 7.5
0 to 1.0
Molybdenum (Mo), % 0
0.4 to 0.8
Nickel (Ni), % 3.5 to 5.5
0
Nitrogen (N), % 0 to 0.25
0
Phosphorus (P), % 0 to 0.060
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.015