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AISI 420 Stainless Steel vs. S44700 Stainless Steel

Both AISI 420 stainless steel and S44700 stainless steel are iron alloys. They have 80% of their average alloy composition in common. There are 29 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 AISI 420 stainless steel and the bottom bar is S44700 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190
200
Elastic (Young's, Tensile) Modulus, GPa 190
210
Elongation at Break, % 8.0 to 15
23
Fatigue Strength, MPa 220 to 670
300
Poisson's Ratio 0.28
0.27
Shear Modulus, GPa 76
82
Shear Strength, MPa 420 to 1010
380
Tensile Strength: Ultimate (UTS), MPa 690 to 1720
600
Tensile Strength: Yield (Proof), MPa 380 to 1310
450

Thermal Properties

Latent Heat of Fusion, J/g 280
300
Maximum Temperature: Corrosion, °C 390
460
Maximum Temperature: Mechanical, °C 620
1100
Melting Completion (Liquidus), °C 1510
1460
Melting Onset (Solidus), °C 1450
1410
Specific Heat Capacity, J/kg-K 480
480
Thermal Expansion, µm/m-K 10
11

Otherwise Unclassified Properties

Base Metal Price, % relative 7.5
18
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 2.0
3.6
Embodied Energy, MJ/kg 28
49
Embodied Water, L/kg 100
180

Common Calculations

PREN (Pitting Resistance) 14
42
Resilience: Ultimate (Unit Rupture Work), MJ/m3 88 to 130
120
Resilience: Unit (Modulus of Resilience), kJ/m3 380 to 4410
480
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 25 to 62
21
Strength to Weight: Bending, points 22 to 41
20
Thermal Shock Resistance, points 25 to 62
19

Alloy Composition

Carbon (C), % 0.15 to 0.4
0 to 0.010
Chromium (Cr), % 12 to 14
28 to 30
Copper (Cu), % 0
0 to 0.15
Iron (Fe), % 82.3 to 87.9
64.9 to 68.5
Manganese (Mn), % 0 to 1.0
0 to 0.3
Molybdenum (Mo), % 0 to 0.5
3.5 to 4.2
Nickel (Ni), % 0 to 0.75
0 to 0.15
Nitrogen (N), % 0
0 to 0.020
Phosphorus (P), % 0 to 0.040
0 to 0.025
Silicon (Si), % 0 to 1.0
0 to 0.2
Sulfur (S), % 0 to 0.030
0 to 0.020