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SS420 Plate
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Hot/Cold Rolled Duplex steel ASTM A240 S32760 steel plate sheet
hot cold rolled No.1 2B surface 1.4021 1.4028 SS420 plate sheet coil
1. Brief Introduction for 1.4021&1.4028
Stainless
Steel 1.4021 is a martensitic machinning bar with machinability
improved with the addition of Sulphur. The Sulphur also lowers
weldability, corrosion resistance, and formability to below that of its
non-free machining equivalent Grade 410.
Martensitic stainless steels are designed for high hardness, and other properties are compromised to an extent. Their functional operating temperature range is restricted by their loss of ductility at sub-zero temperatures, and loss of strength by over-tempering at high temperatures.
Alloy designations of 1.4021 is similar, but it may not be a direct equivalent to: 420, UNS42000, 1.4021, 1.4024, 1.4028, 1.4029, 1.4030, and 1.4034. It is supplied in the form of a bar.
2. 1.4021 material Chemical Composition
| 1.4021 Steel | EN 10088-3:2005 |
| Chemical Element | % Present |
| Carbon (C) | 0.16 - 0.25 |
| Chromium (Cr) | 12.00 - 14.00 |
| Manganese (Mn) | 0.0 - 1.50 |
| Silicon (Si) | 0.0 - 1.00 |
| Phosphorous (P) | 0.0 - 0.04 |
| Sulphur (S) | 0.0 - 0.03 |
| Iron (Fe) | Balance |
Properties
| Physical Property | Value |
| Density | 7.75 g/cm³ |
| Thermal Expansion | 10.3 x10^-6 /K |
| Modulus of Elasticity | 200 GPa |
| Thermal Conductivity | 24.9 W/m.K |
| Electrical Resistivity | 0.055 x10^-6 Ω .m |
| Bar - Up to 160mm Dia/Thickness | EN 10088-3:2005 |
| Mechanical Property | Value |
| Proof Stress | 500 - 600 MPa |
| Tensile Strength | 700 - 950 MPa |
| Elongation A | 12 - 13 % |
3. 1.4021 plate common test
For plates, sheets, we usually do dimension test, PMI test(showing metal element chemical composition)
4. Package for 1.4021 plate
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