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AWS E630 vs. S44625 Stainless Steel

Both AWS E630 and S44625 stainless steel are iron alloys. They have 89% of their average alloy composition in common. There are 25 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is AWS E630 and the bottom bar is S44625 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 8.0
22
Poisson's Ratio 0.28
0.27
Shear Modulus, GPa 76
80
Tensile Strength: Ultimate (UTS), MPa 1040
590

Thermal Properties

Latent Heat of Fusion, J/g 280
290
Melting Completion (Liquidus), °C 1430
1440
Melting Onset (Solidus), °C 1380
1400
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 17
17
Thermal Expansion, µm/m-K 14
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.3
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 2.6
2.6

Otherwise Unclassified Properties

Base Metal Price, % relative 14
14
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 2.8
2.8
Embodied Energy, MJ/kg 40
39
Embodied Water, L/kg 140
160

Common Calculations

PREN (Pitting Resistance) 18
30
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 37
21
Strength to Weight: Bending, points 29
20
Thermal Diffusivity, mm2/s 4.5
4.6
Thermal Shock Resistance, points 28
19

Alloy Composition

Carbon (C), % 0 to 0.050
0 to 0.010
Chromium (Cr), % 16 to 16.8
25 to 27.5
Copper (Cu), % 3.3 to 4.0
0 to 0.2
Iron (Fe), % 71.6 to 75.9
69.4 to 74.3
Manganese (Mn), % 0.25 to 0.75
0 to 0.4
Molybdenum (Mo), % 0 to 0.75
0.75 to 1.5
Nickel (Ni), % 4.5 to 5.0
0 to 0.5
Niobium (Nb), % 0.15 to 0.3
0
Nitrogen (N), % 0
0 to 0.015
Phosphorus (P), % 0 to 0.040
0 to 0.020
Silicon (Si), % 0 to 0.75
0 to 0.4
Sulfur (S), % 0 to 0.030
0 to 0.020