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EN 1.4981 Stainless Steel vs. EN 1.4309 Stainless Steel

Both EN 1.4981 stainless steel and EN 1.4309 stainless steel are iron alloys. Both are furnished in the solution annealed (AT) condition. They have a moderately high 91% 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 1.4981 stainless steel and the bottom bar is EN 1.4309 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190
140
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 39
34
Fatigue Strength, MPa 210
170
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
77
Tensile Strength: Ultimate (UTS), MPa 610
490
Tensile Strength: Yield (Proof), MPa 240
210

Thermal Properties

Latent Heat of Fusion, J/g 290
290
Maximum Temperature: Corrosion, °C 520
420
Maximum Temperature: Mechanical, °C 940
960
Melting Completion (Liquidus), °C 1440
1420
Melting Onset (Solidus), °C 1400
1380
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 16
15
Thermal Expansion, µm/m-K 16
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
2.6

Otherwise Unclassified Properties

Base Metal Price, % relative 25
16
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 4.8
3.1
Embodied Energy, MJ/kg 67
45
Embodied Water, L/kg 150
150

Common Calculations

PREN (Pitting Resistance) 22
21
Resilience: Ultimate (Unit Rupture Work), MJ/m3 190
140
Resilience: Unit (Modulus of Resilience), kJ/m3 150
110
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 21
18
Strength to Weight: Bending, points 20
18
Thermal Diffusivity, mm2/s 4.3
4.1
Thermal Shock Resistance, points 14
11

Alloy Composition

Carbon (C), % 0.040 to 0.1
0 to 0.030
Chromium (Cr), % 15.5 to 17.5
18 to 20
Iron (Fe), % 59.6 to 66.7
64.2 to 73
Manganese (Mn), % 0 to 1.5
0 to 2.0
Molybdenum (Mo), % 1.6 to 2.0
0
Nickel (Ni), % 15.5 to 17.5
9.0 to 12
Niobium (Nb), % 0.4 to 1.2
0
Nitrogen (N), % 0
0 to 0.2
Phosphorus (P), % 0 to 0.035
0 to 0.035
Silicon (Si), % 0.3 to 0.6
0 to 1.5
Sulfur (S), % 0 to 0.015
0 to 0.025