430 Stainless Steel Sheet

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  • 430 Stainless Steel Sheet

Model:
430 Stainless Steel Sheet
Specifications
Article430 Cold Rolled stainless steel sheet
StandardAISI, ASTM, GB, JIS
Widthas your requirement
Surface2B
typePlate / Strip / Sheet / Coil
Thickness0.4mm; 0.5mm; 0.6mm; 0.7mm; 0.8mm; 0.9mm; 1.0mm; 1.1mm; 1.2mm; 1.3mm; 1.4mm; 1.5mm; 1.6mm; 1.7mm; 1.8mm; 1.9mm; 2.0mm~4.0mm
UsageCold rolled, annealed, pickled, skin-passed to give an appropriate luster at final stage., their glossiness and flatness are better than No.2D products. They can be competent for almost all the applications of cold-rolled stainless steel, such as kitchen and bathroom ware, surface polishing, furniture structural parts, etc.
Parkingwooden packing or as your requirement
PaymentSmall quantity:T/T at sight, 30% in advance , 70% after receiving the B/L cop ; Large quantity:L/C at sight
Delivery Time15days after received T/T or L/C

SUS430 chemical composition:
ElementsCSiMnPSCrNi
Specification0.120.751.000.0400.03016.00-18.000.00-0.00

Recently, high-temperature gas nitriding (HTGN) or solution nitriding was introduced as a method for adding nitrogen to stainless steels. This new nitrogen addition method involves a diffusion process for nitrogen to permeate the surface of stainless steel through heat treatment in N2 atmosphere at high temperatures.
When nitrogen, a strong austenite forming element, permeates from the surface into the interior of stainless steel, the surface microstructure changes into austenite or martensite depending on the amount of nitrogen permeated and the process temperature.

As a result, the corrosion resistance and hardness of the surface layers increase. In general, HTGN has usually been applied to Cr based austenitic, martensitic and duplex stainless steels, which have high nitrogen solubility in the austenite phase.

However, the lownitrogen solubility of a ferrite single phase prevents HTGN of ferritic stainless steel. On the other hand, HTGN of the ferritic 409L stainless steel, containing low carbon and a strong nitride forming element of Ti, showed the appearance of a martensite phase at the surface layer due to the nitrogen permeation. Ferritic stainless steels were adopted to use in the manufacture of engine mufflers, nuts, bolts and heat resistant tools. In some cases, such steels require high surface hardness.

In this study, the effect of a HTGN treatment and the tempering of 430 stainless steel was examined as a function of the surface phase changes, nitrogen content and corrosion resistance.

Abstract
This study examined the phase changes, nitride precipitation, heat treatment, hardness variations and tempering effect of AISI 430 ferritic stainless steel after high-temperature gas nitriding (HTGN) at 1050 ℃ and 1100 ℃ in a nitrogen gas atmosphere. The strong affinity between nitrogen and Cr enabled the permeation of nitrogen into AISI 430 ferritic stainless steel. The surface layer of the steel was changed into martensite + ferrite and Cr2N at 1050 ℃, while martensite plus a rectangular type retained austenite were observed at 1100 ℃ after HTGN. When the nitrogen-alloyed AISI 430 steel was tempered, the precipitation of (CrFe)N nitride and a secondary hardening effect resulted in an increase in hardness to a maximum value at 450 ℃. Above 450 ℃, nitride precipitation decreased the hardness considerably. The HTGN treatment improved the corrosion resistance, while the precipitation of high density of Cr2N deteriorated the corrosion resistance.


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