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EN 1.4125 Stainless Steel vs. AISI 202 Stainless Steel

Both EN 1.4125 stainless steel and AISI 202 stainless steel are iron alloys. They have 86% of their average alloy composition in common.

For each property being compared, the top bar is EN 1.4125 stainless steel and the bottom bar is AISI 202 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 250
210 to 300
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 19
14 to 45
Fatigue Strength, MPa 300
290 to 330
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
77
Shear Strength, MPa 500
490 to 590
Tensile Strength: Ultimate (UTS), MPa 800
700 to 980
Tensile Strength: Yield (Proof), MPa 470
310 to 580

Thermal Properties

Latent Heat of Fusion, J/g 280
290
Maximum Temperature: Corrosion, °C 390
410
Maximum Temperature: Mechanical, °C 870
910
Melting Completion (Liquidus), °C 1430
1400
Melting Onset (Solidus), °C 1390
1360
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 15
15
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
2.9

Otherwise Unclassified Properties

Base Metal Price, % relative 9.0
13
Density, g/cm3 7.7
7.7
Embodied Carbon, kg CO2/kg material 2.3
2.8
Embodied Energy, MJ/kg 32
40
Embodied Water, L/kg 120
150

Common Calculations

PREN (Pitting Resistance) 19
20
Resilience: Ultimate (Unit Rupture Work), MJ/m3 130
120 to 260
Resilience: Unit (Modulus of Resilience), kJ/m3 570
250 to 840
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 29
25 to 35
Strength to Weight: Bending, points 25
23 to 29
Thermal Diffusivity, mm2/s 4.1
4.0
Thermal Shock Resistance, points 29
15 to 21

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
63.5 to 71.5
Manganese (Mn), % 0 to 1.0
7.5 to 10
Molybdenum (Mo), % 0.4 to 0.8
0
Nickel (Ni), % 0
4.0 to 6.0
Nitrogen (N), % 0
0 to 0.25
Phosphorus (P), % 0 to 0.040
0 to 0.060
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.015
0 to 0.030