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
| Material | C | Si | Mn | P | S | Ni | Cr |
| 309S | ≤0.08 | ≤1.00 | ≤2.00 | ≤0.045 | ≤0.03 | 12.0~15.0 | 22.0~24.0 |
309S Mechanical Properties
| Material | Yield Strength N/mm2 | Tensile Strength
N/mm2 | Elongation
(%) |
|
| 309S | ≥205 | ≥515 | ≥40 |
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.
Products' Photos
