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EN 1.7725 Steel vs. AISI 348H Stainless Steel

Both EN 1.7725 steel and AISI 348H stainless steel are iron alloys. They have 71% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is EN 1.7725 steel and the bottom bar is AISI 348H stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 250 to 300
180
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 14
40
Fatigue Strength, MPa 390 to 550
200
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
77
Tensile Strength: Ultimate (UTS), MPa 830 to 1000
580
Tensile Strength: Yield (Proof), MPa 610 to 860
230

Thermal Properties

Latent Heat of Fusion, J/g 250
290
Maximum Temperature: Mechanical, °C 440
940
Melting Completion (Liquidus), °C 1460
1430
Melting Onset (Solidus), °C 1420
1390
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 39
15
Thermal Expansion, µm/m-K 13
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.4
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 8.6
2.7

Otherwise Unclassified Properties

Base Metal Price, % relative 2.9
20
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.8
3.9
Embodied Energy, MJ/kg 24
56
Embodied Water, L/kg 54
150

Common Calculations

PREN (Pitting Resistance) 2.8
18
Resilience: Ultimate (Unit Rupture Work), MJ/m3 110 to 130
190
Resilience: Unit (Modulus of Resilience), kJ/m3 980 to 1940
140
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 29 to 35
21
Strength to Weight: Bending, points 25 to 28
20
Thermal Diffusivity, mm2/s 11
4.1
Thermal Shock Resistance, points 24 to 29
13

Alloy Composition

Carbon (C), % 0.27 to 0.34
0.040 to 0.1
Chromium (Cr), % 1.3 to 1.7
17 to 19
Cobalt (Co), % 0
0 to 0.2
Iron (Fe), % 95.7 to 97.5
63.8 to 73.6
Manganese (Mn), % 0.6 to 1.0
0 to 2.0
Molybdenum (Mo), % 0.3 to 0.5
0
Nickel (Ni), % 0
9.0 to 13
Niobium (Nb), % 0
0.32 to 1.0
Phosphorus (P), % 0 to 0.025
0 to 0.045
Silicon (Si), % 0 to 0.6
0 to 0.75
Sulfur (S), % 0 to 0.030
0 to 0.030
Tantalum (Ta), % 0
0 to 0.1
Vanadium (V), % 0.050 to 0.15
0