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EN 1.4658 Stainless Steel vs. EN 1.4912 Stainless Steel

Both EN 1.4658 stainless steel and EN 1.4912 stainless steel are iron alloys. Both are furnished in the solution annealed (AT) condition. They have 84% of their average alloy composition in common. There are 32 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is EN 1.4658 stainless steel and the bottom bar is EN 1.4912 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 260
180
Elastic (Young's, Tensile) Modulus, GPa 210
200
Elongation at Break, % 28
40
Fatigue Strength, MPa 530
200
Impact Strength: V-Notched Charpy, J 110
90
Poisson's Ratio 0.27
0.28
Shear Modulus, GPa 81
77
Shear Strength, MPa 580
420
Tensile Strength: Ultimate (UTS), MPa 900
610
Tensile Strength: Yield (Proof), MPa 730
230

Thermal Properties

Latent Heat of Fusion, J/g 300
290
Maximum Temperature: Corrosion, °C 460
520
Maximum Temperature: Mechanical, °C 1100
940
Melting Completion (Liquidus), °C 1450
1430
Melting Onset (Solidus), °C 1400
1390
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 16
16
Thermal Expansion, µm/m-K 13
16

Otherwise Unclassified Properties

Base Metal Price, % relative 25
20
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 4.5
3.8
Embodied Energy, MJ/kg 61
55
Embodied Water, L/kg 200
140

Common Calculations

PREN (Pitting Resistance) 49
18
Resilience: Ultimate (Unit Rupture Work), MJ/m3 240
190
Resilience: Unit (Modulus of Resilience), kJ/m3 1280
130
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 32
22
Strength to Weight: Bending, points 26
20
Thermal Diffusivity, mm2/s 4.3
4.2
Thermal Shock Resistance, points 24
14

Alloy Composition

Carbon (C), % 0 to 0.030
0.040 to 0.1
Chromium (Cr), % 26 to 29
17 to 19
Cobalt (Co), % 0.5 to 2.0
0
Copper (Cu), % 0 to 1.0
0
Iron (Fe), % 50.9 to 63.7
64.6 to 73.6
Manganese (Mn), % 0 to 1.5
0 to 2.0
Molybdenum (Mo), % 4.0 to 5.0
0
Nickel (Ni), % 5.5 to 9.5
9.0 to 12
Niobium (Nb), % 0
0.4 to 1.2
Nitrogen (N), % 0.3 to 0.5
0
Phosphorus (P), % 0 to 0.035
0 to 0.045
Silicon (Si), % 0 to 0.5
0 to 1.0
Sulfur (S), % 0 to 0.010
0 to 0.015