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EN 1.4736 Stainless Steel vs. EN 1.4109 Stainless Steel

Both EN 1.4736 stainless steel and EN 1.4109 stainless steel are iron alloys. Both are furnished in the annealed condition. They have a moderately high 95% of their average alloy composition in common.

For each property being compared, the top bar is EN 1.4736 stainless steel and the bottom bar is EN 1.4109 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 170
250
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 28
19
Fatigue Strength, MPa 230
270
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 76
76
Shear Strength, MPa 370
480
Tensile Strength: Ultimate (UTS), MPa 580
770
Tensile Strength: Yield (Proof), MPa 310
420

Thermal Properties

Latent Heat of Fusion, J/g 290
280
Maximum Temperature: Corrosion, °C 500
390
Maximum Temperature: Mechanical, °C 1000
820
Melting Completion (Liquidus), °C 1420
1440
Melting Onset (Solidus), °C 1380
1400
Specific Heat Capacity, J/kg-K 490
480
Thermal Conductivity, W/m-K 21
30
Thermal Expansion, µm/m-K 10
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.9
2.7
Electrical Conductivity: Equal Weight (Specific), % IACS 3.4
3.1

Otherwise Unclassified Properties

Base Metal Price, % relative 9.0
8.5
Density, g/cm3 7.6
7.7
Embodied Carbon, kg CO2/kg material 2.4
2.2
Embodied Energy, MJ/kg 35
30
Embodied Water, L/kg 140
110

Common Calculations

PREN (Pitting Resistance) 18
17
Resilience: Ultimate (Unit Rupture Work), MJ/m3 140
120
Resilience: Unit (Modulus of Resilience), kJ/m3 250
460
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 21
28
Strength to Weight: Bending, points 20
24
Thermal Diffusivity, mm2/s 5.6
8.1
Thermal Shock Resistance, points 21
28

Alloy Composition

Aluminum (Al), % 1.7 to 2.1
0
Carbon (C), % 0 to 0.040
0.6 to 0.75
Chromium (Cr), % 17 to 18
14 to 16
Iron (Fe), % 77 to 81.1
80.7 to 85
Manganese (Mn), % 0 to 1.0
0 to 1.0
Molybdenum (Mo), % 0
0.4 to 0.8
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 0.7
Sulfur (S), % 0 to 0.015
0 to 0.015
Titanium (Ti), % 0.2 to 0.8
0