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EN 1.4306 Stainless Steel vs. EN 1.4509 Stainless Steel

Both EN 1.4306 stainless steel and EN 1.4509 stainless steel are iron alloys. They have 87% of their average alloy composition in common.

For each property being compared, the top bar is EN 1.4306 stainless steel and the bottom bar is EN 1.4509 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190 to 270
180
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 14 to 45
21
Fatigue Strength, MPa 190 to 330
170
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
77
Shear Strength, MPa 400 to 550
330
Tensile Strength: Ultimate (UTS), MPa 580 to 900
530
Tensile Strength: Yield (Proof), MPa 210 to 570
260

Thermal Properties

Latent Heat of Fusion, J/g 290
280
Maximum Temperature: Corrosion, °C 420
570
Maximum Temperature: Mechanical, °C 960
890
Melting Completion (Liquidus), °C 1420
1440
Melting Onset (Solidus), °C 1380
1400
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 15
25
Thermal Expansion, µm/m-K 16
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 2.7
3.4

Otherwise Unclassified Properties

Base Metal Price, % relative 16
13
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 3.2
2.8
Embodied Energy, MJ/kg 45
41
Embodied Water, L/kg 150
120

Common Calculations

PREN (Pitting Resistance) 20
18
Resilience: Ultimate (Unit Rupture Work), MJ/m3 110 to 200
90
Resilience: Unit (Modulus of Resilience), kJ/m3 110 to 820
180
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 21 to 32
19
Strength to Weight: Bending, points 20 to 27
19
Thermal Diffusivity, mm2/s 4.0
6.8
Thermal Shock Resistance, points 13 to 20
19

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.030
Chromium (Cr), % 18 to 20
17.5 to 18.5
Iron (Fe), % 64.8 to 72
77.8 to 82.1
Manganese (Mn), % 0 to 2.0
0 to 1.0
Nickel (Ni), % 10 to 12
0
Niobium (Nb), % 0
0.3 to 1.0
Nitrogen (N), % 0 to 0.1
0
Phosphorus (P), % 0 to 0.045
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.015
0 to 0.015
Titanium (Ti), % 0
0.1 to 0.6