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EN 1.4303 Stainless Steel vs. EN 1.4406 Stainless Steel

Both EN 1.4303 stainless steel and EN 1.4406 stainless steel are iron alloys. They have a very high 98% of their average alloy composition in common.

For each property being compared, the top bar is EN 1.4303 stainless steel and the bottom bar is EN 1.4406 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190 to 270
220
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 13 to 49
42
Fatigue Strength, MPa 220 to 320
280
Impact Strength: V-Notched Charpy, J 91 to 98
90
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
78
Shear Strength, MPa 420 to 540
470
Tensile Strength: Ultimate (UTS), MPa 590 to 900
680
Tensile Strength: Yield (Proof), MPa 230 to 560
320

Thermal Properties

Latent Heat of Fusion, J/g 290
290
Maximum Temperature: Corrosion, °C 410
410
Maximum Temperature: Mechanical, °C 940
950
Melting Completion (Liquidus), °C 1420
1440
Melting Onset (Solidus), °C 1380
1400
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 15
15
Thermal Expansion, µm/m-K 16
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
2.3
Electrical Conductivity: Equal Weight (Specific), % IACS 2.7
2.6

Otherwise Unclassified Properties

Base Metal Price, % relative 17
18
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 3.2
3.7
Embodied Energy, MJ/kg 46
51
Embodied Water, L/kg 150
150

Common Calculations

PREN (Pitting Resistance) 19
28
Resilience: Ultimate (Unit Rupture Work), MJ/m3 110 to 230
240
Resilience: Unit (Modulus of Resilience), kJ/m3 140 to 800
260
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 21 to 32
24
Strength to Weight: Bending, points 20 to 26
22
Thermal Diffusivity, mm2/s 4.0
4.0
Thermal Shock Resistance, points 13 to 20
15

Alloy Composition

Carbon (C), % 0 to 0.060
0 to 0.030
Chromium (Cr), % 17 to 19
16.5 to 18.5
Iron (Fe), % 64.8 to 72
63.2 to 71.4
Manganese (Mn), % 0 to 2.0
0 to 2.0
Molybdenum (Mo), % 0
2.0 to 2.5
Nickel (Ni), % 11 to 13
10 to 12.5
Nitrogen (N), % 0 to 0.1
0.12 to 0.22
Phosphorus (P), % 0 to 0.045
0 to 0.045
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.015
0 to 0.015