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EN 1.4749 Stainless Steel vs. EN 1.4878 Stainless Steel

Both EN 1.4749 stainless steel and EN 1.4878 stainless steel are iron alloys. They have 89% of their average alloy composition in common.

For each property being compared, the top bar is EN 1.4749 stainless steel and the bottom bar is EN 1.4878 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 180
180
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 16
45
Fatigue Strength, MPa 190
190
Poisson's Ratio 0.27
0.28
Shear Modulus, GPa 80
77
Shear Strength, MPa 370
430
Tensile Strength: Ultimate (UTS), MPa 600
610
Tensile Strength: Yield (Proof), MPa 320
210

Thermal Properties

Latent Heat of Fusion, J/g 300
290
Maximum Temperature: Corrosion, °C 450
490
Maximum Temperature: Mechanical, °C 1100
850
Melting Completion (Liquidus), °C 1420
1430
Melting Onset (Solidus), °C 1380
1380
Specific Heat Capacity, J/kg-K 490
480
Thermal Conductivity, W/m-K 17
15
Thermal Expansion, µm/m-K 9.6
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.5
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 2.9
2.7

Otherwise Unclassified Properties

Base Metal Price, % relative 13
16
Density, g/cm3 7.6
7.8
Embodied Carbon, kg CO2/kg material 2.5
3.2
Embodied Energy, MJ/kg 36
46
Embodied Water, L/kg 160
140

Common Calculations

PREN (Pitting Resistance) 31
18
Resilience: Ultimate (Unit Rupture Work), MJ/m3 80
210
Resilience: Unit (Modulus of Resilience), kJ/m3 250
120
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 26
25
Strength to Weight: Axial, points 22
22
Strength to Weight: Bending, points 21
20
Thermal Diffusivity, mm2/s 4.6
4.0
Thermal Shock Resistance, points 22
13

Alloy Composition

Carbon (C), % 0.15 to 0.2
0 to 0.1
Chromium (Cr), % 26 to 29
17 to 19
Iron (Fe), % 68.5 to 73.7
65 to 74
Manganese (Mn), % 0 to 1.0
0 to 2.0
Nickel (Ni), % 0
9.0 to 12
Nitrogen (N), % 0.15 to 0.25
0
Phosphorus (P), % 0 to 0.040
0 to 0.045
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.015
0 to 0.015
Titanium (Ti), % 0
0 to 0.8