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EN 1.4958 Stainless Steel vs. EN 1.4655 Stainless Steel

Both EN 1.4958 stainless steel and EN 1.4655 stainless steel are iron alloys. They have 72% of their average alloy composition in common.

For each property being compared, the top bar is EN 1.4958 stainless steel and the bottom bar is EN 1.4655 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 40
23 to 25
Fatigue Strength, MPa 170
320
Poisson's Ratio 0.28
0.27
Shear Modulus, GPa 77
78
Shear Strength, MPa 430
460
Tensile Strength: Ultimate (UTS), MPa 630
720 to 730
Tensile Strength: Yield (Proof), MPa 190
450 to 480

Thermal Properties

Latent Heat of Fusion, J/g 300
290
Maximum Temperature: Corrosion, °C 500
440
Maximum Temperature: Mechanical, °C 1090
1050
Melting Completion (Liquidus), °C 1400
1420
Melting Onset (Solidus), °C 1350
1370
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 12
15
Thermal Expansion, µm/m-K 15
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.7
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 2.0
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 30
15
Density, g/cm3 8.0
7.7
Embodied Carbon, kg CO2/kg material 5.3
2.9
Embodied Energy, MJ/kg 75
41
Embodied Water, L/kg 200
160

Common Calculations

PREN (Pitting Resistance) 21
26
Resilience: Ultimate (Unit Rupture Work), MJ/m3 190
150 to 160
Resilience: Unit (Modulus of Resilience), kJ/m3 95
510 to 580
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 22
26
Strength to Weight: Bending, points 20
23
Thermal Diffusivity, mm2/s 3.2
4.0
Thermal Shock Resistance, points 15
20

Alloy Composition

Aluminum (Al), % 0.2 to 0.5
0
Carbon (C), % 0.030 to 0.080
0 to 0.030
Chromium (Cr), % 19 to 22
22 to 24
Cobalt (Co), % 0 to 0.5
0
Copper (Cu), % 0 to 0.5
1.0 to 3.0
Iron (Fe), % 41.1 to 50.6
63.6 to 73.4
Manganese (Mn), % 0 to 1.5
0 to 2.0
Molybdenum (Mo), % 0
0.1 to 0.6
Nickel (Ni), % 30 to 32.5
3.5 to 5.5
Niobium (Nb), % 0 to 0.1
0
Nitrogen (N), % 0 to 0.030
0.050 to 0.2
Phosphorus (P), % 0 to 0.015
0 to 0.035
Silicon (Si), % 0 to 0.7
0 to 1.0
Sulfur (S), % 0 to 0.010
0 to 0.015
Titanium (Ti), % 0.2 to 0.5
0