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Our products conform to GB, AISI, ASTM, DIN, EN, JIS standard for stainlesss steel coil, sheet and plate.

309 Stainless Steel Coil, 309S Stainless Steel Coil, 309 Stainless Coil, 309S Stainless Steel Coil
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309/309S STAINLESS STEEL COIL

309/309S stainless steel coil is a austenitic chromium-nickel stainless steel. Ronsco is proud to exported it to more than 80 countries.
309/309S STAINLESS STEEL COIL

MORE DETAILS ABOUT 309/309S STAINLESS STEEL COIL

Product Name

309/309S Stainless Steel Coil

Equivalent Grade

309: AISI 309, UNS S30900, SAE 309, DIN 1.4833, SUS 309, X12CrNi23-13

309S: AISI 309S, UNS S30908, SAE 309S, DIN 1.4950, SUS 309S, X6CrNi23-13

Standard

GB, AISI, ASTM, DIN, EN, JIS

Process

Hot Rolled, Cold Rolled

Sizes

Thickness: 0.1-16mm, Width: 600-2000mm

Surface Treatment

NO.1, 2B, NO.4, BA, HL, Mirror

Inspection

SGS, TUV, BV, ABS, LR etc.

Packing

Wooden Box, Wooden Pallet, Iron Frame

Application

Oil&Gas, Petroleum, Vessels, Ship Building, Water Treatment And Environmental Protection etc.

GENERAL INFO ABOUT EACH Stainless Steel Coil GRADE

309/309S stainless steel coil contains high chromium and nickel. It is highly corrosion resistant, outstanding resistance to oxidation, and excellent heat resistance. At the same time, they can be roll formed, stamped and drawn readily. It is widely applied in high temperature containers.

MORE DETAILS ABOUT EACH Stainless Steel Coil GRADE

  • Hot Forming
  • Welding

309/309S Stainless Steel Grade:


Heat uniformly at 1742 – 2192°F (950 – 1200°C). After hot forming a final anneal at 1832 – 2101°F (1000 – 1150°C) followed by rapid quenching is recommended.

309/309S Stainless Steel Grade:


It can be welded by most standard processesincluding TIG, PLASMA, MIG, SMAW, SAW and FCAW.

CHEMICAL PROPERTIES


C

Mn

P

S

Si

Cr

Ni

Mo

N

Cu

309

0.20

2.00

0.045

0.03

0.75

22.00-24.00

12.00-15.00

/

/

/

309S

0.08

2.00

0.045

0.03

0.75

22.00-24.00

12.00-15.00

/

/

/

MECHANICAL PROPERTIES


Tensile Strength (min)

Yield Strength (min)

Elongation

Hardness, max

ksi

Mpa

ksi

Mpa

/

Brinell.HBW

Rockwell

309

75

515

30

205

40

217

95HRBW

309S

75

515

30

205

40

217

95HRBW

MORE DETAILS ABOUT EACH Stainless Steel Coil PROCESS

  • Hot Rolled
  • Cold Rolled

Hot rolling is a metalworking process. Such as steel ingots or billets are difficult to deform and process at room temperature, they are generally heated to 1100 to 1250° for rolling, this rolling process is called hot rolling. Most steel materials are rolled by hot rolling, the steel delivered in the hot-rolled state has a certain degree of corrosion resistance due to the high temperature, so it can bestored in the open air. In addition, hot rolling is that it can destroy the casting structure of the ingot, refine the grain of the steel, eliminate structural defects, make the steel structure dense,  and improve the hardness of the hot rolled steel.

Cold rolling refers to a rolling process that uses the pressure of rolls to squeeze steel to change the shape of the steel at room temperature. The advantafe of cold rolling is fast forming speed, high output, the coating is not damaged, and it can be made into a variety of cross-sectional forms to meet the needs of the use conditions. In addition, cold rolling can cause large plastic deformation of the steel, thereby increasing the yield point of the steel. Which is Widely used in home appliances and other industries.

MORE DETAILS ABOUT EACH Stainless Steel Coil SURFACE

  • NO.1
  • 2D
  • 2B
  • NO.4
  • BA
  • HL
  • Mirror
NO.1 surface treated by heat treatment and pickling after hot rolling. The  appearance is silver white, matt and bright. This surface is suitable for industries that require heat resistance and corrosion resistance, and the surface brightness is not important. Common applications include industrial tank and chemical industrial plants etc..
2D surface treated by heat treatment and pickling after cold rolling. The appearance is silver white, smoother but of matt grain. Common applications include petrochemical production equipment, automotive components, building materials and water pipes etc..
After 2D treatment, the final process is lightly cold rolled by a polishing roller to obtain proper gloss. The appearance is smooth and bright, and easy to re-grind to make the surface more brighter.  Common applications include building materials, tableware etc..
NO.4 is a product ground with a grinding belt of size 150-180. It has better gloss, discontinuous rough lines and finer stripes than No.3 stainless steel castings commonly used polished and sanded surfaces. Common applications include food processing equipment, home electrical products, medical equipment etc..
BA surface is also produced by cold rolling and de-scaling. It has excellent surface gloss, high reflectivity. In addition, The very smooth surface also makes this surface highly suitable for further finishing processes such as mirror polishing and chrome plating. Common applications include catering equipment etc..
HL use a polishing abrasive belt with an appropriate particle size (150-320 mesh) to grind, with obvious straight stripes. The surface is beautiful, good texture and scratch is not obvious, durable,  wear-resistant. Common applications include building decoratio, elevators, vehicle parts, etc..
Mirror is produced by polishing with successively finer abrasives and buffing extensively until all grit lines from preliminary grinding operations are removed. The feature is highest reflectivity. Mainly used for interior and exterior decoration materials of automobiles and buildings.

FREQUENTLY ASKED QUESTIONS

  • What Is The Difference Between 309 And 309S?
  • What Is Stainless Steel?
  • How Does Chromium Prevent Rusting?

What Is The Difference Between 309 And 309S?


Answer:


309S is an extra-low carbon variant of 309. Due to a lower carbon content, that minimizes carbide precipitation and improves weldability. 


What Is Stainless Steel?


Answer:


309/309S is one of the stainless steel grade. Grades of steel that contain more than 10 percent chromium — with or without other alloying elements — are called stainless steel. 


How Does Chromium Prevent Rusting?


Answer:


309/309S stainless steel contains chromium (22.0 min.-24.0 max). Chromium and other elements react with air and water to form a thin film on the outside of the steel. This film serves as a barrier that prevents corrosion.


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