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EN 1.4125 Stainless Steel vs. EN 1.4310 Stainless Steel

Both EN 1.4125 stainless steel and EN 1.4310 stainless steel are iron alloys. They have a moderately high 91% 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 EN 1.4310 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 250
200 to 270
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 19
14 to 45
Fatigue Strength, MPa 300
240 to 330
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
77
Shear Strength, MPa 500
510 to 550
Tensile Strength: Ultimate (UTS), MPa 800
730 to 900
Tensile Strength: Yield (Proof), MPa 470
260 to 570

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
1420
Melting Onset (Solidus), °C 1390
1380
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 15
15
Thermal Expansion, µm/m-K 10
18

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
2.7

Otherwise Unclassified Properties

Base Metal Price, % relative 9.0
14
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 2.3
2.9
Embodied Energy, MJ/kg 32
42
Embodied Water, L/kg 120
140

Common Calculations

PREN (Pitting Resistance) 19
20
Resilience: Ultimate (Unit Rupture Work), MJ/m3 130
110 to 260
Resilience: Unit (Modulus of Resilience), kJ/m3 570
170 to 830
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 29
26 to 32
Strength to Weight: Bending, points 25
23 to 27
Thermal Diffusivity, mm2/s 4.1
4.0
Thermal Shock Resistance, points 29
15 to 18

Alloy Composition

Carbon (C), % 1.0 to 1.2
0.050 to 0.15
Chromium (Cr), % 16 to 18
16 to 19
Iron (Fe), % 78 to 82.7
66.4 to 78
Manganese (Mn), % 0 to 1.0
0 to 2.0
Molybdenum (Mo), % 0.4 to 0.8
0 to 0.8
Nickel (Ni), % 0
6.0 to 9.5
Nitrogen (N), % 0
0 to 0.1
Phosphorus (P), % 0 to 0.040
0 to 0.045
Silicon (Si), % 0 to 1.0
0 to 2.0
Sulfur (S), % 0 to 0.015
0 to 0.015