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EN 1.4150 Stainless Steel vs. EN 1.4125 Stainless Steel

Both EN 1.4150 stainless steel and EN 1.4125 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.

For each property being compared, the top bar is EN 1.4150 stainless steel and the bottom bar is EN 1.4125 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 220
250
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 20
19
Fatigue Strength, MPa 270
300
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 76
77
Shear Strength, MPa 460
500
Tensile Strength: Ultimate (UTS), MPa 730
800
Tensile Strength: Yield (Proof), MPa 430
470

Thermal Properties

Latent Heat of Fusion, J/g 290
280
Maximum Temperature: Corrosion, °C 390
390
Maximum Temperature: Mechanical, °C 840
870
Melting Completion (Liquidus), °C 1420
1430
Melting Onset (Solidus), °C 1380
1390
Specific Heat Capacity, J/kg-K 490
480
Thermal Conductivity, W/m-K 23
15
Thermal Expansion, µm/m-K 10
10

Electrical Properties

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

Otherwise Unclassified Properties

Base Metal Price, % relative 8.5
9.0
Density, g/cm3 7.6
7.7
Embodied Carbon, kg CO2/kg material 2.8
2.3
Embodied Energy, MJ/kg 42
32
Embodied Water, L/kg 120
120

Common Calculations

PREN (Pitting Resistance) 19
19
Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
130
Resilience: Unit (Modulus of Resilience), kJ/m3 470
570
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 27
29
Strength to Weight: Bending, points 24
25
Thermal Diffusivity, mm2/s 6.2
4.1
Thermal Shock Resistance, points 27
29

Alloy Composition

Carbon (C), % 0.45 to 0.6
1.0 to 1.2
Chromium (Cr), % 15 to 16.5
16 to 18
Iron (Fe), % 79 to 82.8
78 to 82.7
Manganese (Mn), % 0 to 0.8
0 to 1.0
Molybdenum (Mo), % 0.2 to 0.4
0.4 to 0.8
Nickel (Ni), % 0 to 0.4
0
Nitrogen (N), % 0.050 to 0.2
0
Phosphorus (P), % 0 to 0.030
0 to 0.040
Silicon (Si), % 1.3 to 1.7
0 to 1.0
Sulfur (S), % 0 to 0.010
0 to 0.015
Vanadium (V), % 0.2 to 0.4
0