MakeItFrom.com
Menu (ESC)

Annealed AISI 420 vs. Annealed S17700 Stainless Steel

Both annealed AISI 420 and annealed S17700 stainless steel are iron alloys. Both are furnished in the annealed condition. They have 88% of their average alloy composition in common.

For each property being compared, the top bar is annealed AISI 420 and the bottom bar is annealed S17700 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190
180
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 15
23
Fatigue Strength, MPa 220
290
Poisson's Ratio 0.28
0.28
Rockwell B Hardness 84
81
Shear Modulus, GPa 76
76
Shear Strength, MPa 420
750
Tensile Strength: Ultimate (UTS), MPa 690
1180
Tensile Strength: Yield (Proof), MPa 380
430

Thermal Properties

Latent Heat of Fusion, J/g 280
290
Maximum Temperature: Corrosion, °C 390
410
Maximum Temperature: Mechanical, °C 620
890
Melting Completion (Liquidus), °C 1510
1440
Melting Onset (Solidus), °C 1450
1400
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 27
15
Thermal Expansion, µm/m-K 10
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.0
2.3
Electrical Conductivity: Equal Weight (Specific), % IACS 3.5
2.7

Otherwise Unclassified Properties

Base Metal Price, % relative 7.5
13
Density, g/cm3 7.7
7.7
Embodied Carbon, kg CO2/kg material 2.0
2.8
Embodied Energy, MJ/kg 28
40
Embodied Water, L/kg 100
150

Common Calculations

PREN (Pitting Resistance) 14
17
Resilience: Ultimate (Unit Rupture Work), MJ/m3 88
210
Resilience: Unit (Modulus of Resilience), kJ/m3 380
460
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 25
42
Strength to Weight: Bending, points 22
32
Thermal Diffusivity, mm2/s 7.3
4.1
Thermal Shock Resistance, points 25
39

Alloy Composition

Aluminum (Al), % 0
0.75 to 1.5
Carbon (C), % 0.15 to 0.4
0 to 0.090
Chromium (Cr), % 12 to 14
16 to 18
Iron (Fe), % 82.3 to 87.9
70.5 to 76.8
Manganese (Mn), % 0 to 1.0
0 to 1.0
Molybdenum (Mo), % 0 to 0.5
0
Nickel (Ni), % 0 to 0.75
6.5 to 7.8
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.030