309 309S Hot Rolled Stainless Steel Sheet for Free-cutting with Low Carbon

Product Description

• Item: 309 309S Hot Rolled Stainless Steel Sheet for Free-cutting with Low Carbon
• Standard: ASTM A240,ASTM A480,ASTM A167,ASTM A176
• Material: 201,202,301,304,304L,304N,XM21,304LN,305,309S,310S,316,316Ti,316L,316N,316LN,317,317L,321,347,329,405,409,430,434,444,403,410,420,440A,etc.
• Specifications:
• Thickness: 0.01-200mm
• Width: 1m,1.22m,1.5m and 1.8m.
• Length: 2m,2.44m,5.8m,6m.
• Surface: No.1, 2B, BA, NO.4, 8K mirror, checkered, embossed, hair line, sand blast, Brush, etching, etc.

What is 309S stainless steel?

The Chinese brand corresponding to 309S is 0Cr23Ni13, and American Standard S30908 (American AISI, ASTM).

Features and uses: Corrosion resistance and heat resistance are better than 0Cr19Ni9.
309s is a variant of 309 stainless steel with a lower carbon content and is used where welding is required. The lower carbon content minimizes the precipitation of carbides in the heat-affected zone near the weld, and the precipitation of carbides may cause intergranular corrosion (weld erosion) of stainless steel in some environments.

It can withstand repeated heating below 980 ℃, and has high temperature strength, oxidation resistance and carburization resistance.
Widely used in boiler, energy (nuclear power, thermal power, fuel cell), industrial furnace, incinerator, heating furnace, chemical industry, petrochemical and other important fields.

309S Chemical Composition

309S Mechanical Properties

Surface

1D—The surface has discontinuous particles, which is also called matte. Processing technology: hot rolling + annealing shot peening pickling + cold rolling + annealing pickling.
2D—Slightly shiny silver-white. Processing technology: hot rolling + annealing shot peening pickling + cold rolling + annealing pickling.
2B—Silver white and better gloss and flatness than 2D surface. Processing technology: hot rolling + annealing shot peening pickling + cold rolling + annealing pickling + quenching and tempering rolling.
BA—The surface gloss is excellent and has a high reflectivity, just like the mirror surface. Processing technology: hot rolling + annealing shot peening pickling + cold rolling + annealing pickling + surface polishing + quenched and tempered rolling.
No.3—has better gloss and rough surface. Processing technology: Polishing and tempering rolling of 2D products or 2B with 100 ~ 120 abrasive materials.
No.4—has better gloss and fine lines on the surface. Processing technology: Polishing and tempering rolling of 2D products or 2B with 150 ~ 180 abrasive materials.
HL—Silver gray with hair streaks. Processing technology: Polish the 2D product or 2B product with a suitable size of abrasive material to make the surface appear continuous grain.
MIRROR—is in a mirror state. Processing technology: 2D or 2B products are ground and polished to a mirror effect with a suitable abrasive material.

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