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AISI 348H Stainless Steel vs. EN 1.4550 Stainless Steel

Both AISI 348H stainless steel and EN 1.4550 stainless steel are iron alloys. Their average alloy composition is basically identical. There are 33 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is AISI 348H stainless steel and the bottom bar is EN 1.4550 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 180
200
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 40
42
Fatigue Strength, MPa 200
210
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
77
Shear Strength, MPa 400
430
Tensile Strength: Ultimate (UTS), MPa 580
620
Tensile Strength: Yield (Proof), MPa 230
230

Thermal Properties

Latent Heat of Fusion, J/g 290
290
Maximum Temperature: Corrosion, °C 500
480
Maximum Temperature: Mechanical, °C 940
940
Melting Completion (Liquidus), °C 1430
1430
Melting Onset (Solidus), °C 1390
1390
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 15
15
Thermal Expansion, µm/m-K 16
16

Electrical Properties

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

Otherwise Unclassified Properties

Base Metal Price, % relative 20
18
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 3.9
3.6
Embodied Energy, MJ/kg 56
51
Embodied Water, L/kg 150
140

Common Calculations

PREN (Pitting Resistance) 18
18
Resilience: Ultimate (Unit Rupture Work), MJ/m3 190
210
Resilience: Unit (Modulus of Resilience), kJ/m3 140
140
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 21
22
Strength to Weight: Bending, points 20
21
Thermal Diffusivity, mm2/s 4.1
4.0
Thermal Shock Resistance, points 13
14

Alloy Composition

Carbon (C), % 0.040 to 0.1
0 to 0.080
Chromium (Cr), % 17 to 19
17 to 19
Cobalt (Co), % 0 to 0.2
0
Iron (Fe), % 63.8 to 73.6
64.9 to 74
Manganese (Mn), % 0 to 2.0
0 to 2.0
Nickel (Ni), % 9.0 to 13
9.0 to 12
Niobium (Nb), % 0.32 to 1.0
0 to 1.0
Phosphorus (P), % 0 to 0.045
0 to 0.045
Silicon (Si), % 0 to 0.75
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.015
Tantalum (Ta), % 0 to 0.1
0