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304/304L/304H STAINLESS STEEL COIL

304/304L/304H stainless steel coil is one of the most popular stainless steel grades and Ronsco is proud to exported it to more than 80 countries.
304/304L/304H STAINLESS STEEL COIL

MORE DETAILS ABOUT 304/304L/304H STAINLESS STEEL COIL

Product Name

304/304L/304H Stainless Steel Coil

Equivalent Grade

304: AISI 304, UNS S30400, SAE 304, DIN 1.4301, SUS 304, X5CrNi18-10

304L: AISI 304L, UNS S30403, SAE 304L, DIN 1.4306, SUS 304L, X2CrNi19-11

304H: AISI 304H, UNS S30409, SAE 304H, DIN 1.4948, SUS 304H, X6CrNi18-10

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.

Application

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

GENERAL INFO ABOUT EACH Stainless Steel Coil GRADE

304/304L/304H stainless steel coil is one of the most widely used austenitic stainless steel grades. The grades shows high strength, excellent corrosion resistance and outstanding formability than any other grade of stainless steel. It is frequently utilized in oil and gas industries etc..

MORE DETAILS ABOUT EACH Stainless Steel Coil GRADE

  • Hot Forming
  • Cold Forming
  • Welding
304/304L/304H Stainless Steel Grade:

For maximum corrosion resistance, the material should be annealed at 1900°F (1038°C) minimum and water quenched or rapidly cooled by other means after hot working.

304/304L/304H Stainless Steel Grade:


It is quite ductile and forms easily. Cold working operations will increase the strength and hardness of the alloy and might leave it slightly magnetic.

304/304L/304H Stainless Steel Grade::


It can be readily welded by most standard processes.


CHEMICAL PROPERTIES

C

Mn

P

S

Si

Cr

Ni

Mo

N

Cu

304

0.07

2.00

0.045

0.03

0.75

17.50-19.50

8.00-10.5

/

0.10

/

304L

0.03

2.00

0.045

0.03

0.75

17.50-19.50

8.00-12.00

/

0.10

/

304H

0.10

2.00

0.045

0.03

0.75

17.50-19.50

8.00-10.5

/

0.10

/

MECHANICAL PROPERTIES


Tensile Strength (min)

Yield Strength (min)

Elongation

Hardness, max

ksi

Mpa

ksi

Mpa

/

Brinell.HBW

Rockwell

304

75

515

30

205

40

201

92HRBW

304L

70

485

25

170

40

201

92HRBW

304H

75

515

30

205

40

201

92HRBW

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 304, 304L And 304H?
  • Why Is 304L Easier To Weld Than 304?
  • What Is The Yield Strength Of This Grade Stainless Steel?

What Is The Difference Between 304, 304L And 304H?


Answer:


304 is considered the most versatile and widely used austenitic stainless steel, 304L is the ultra low carbon variant of 304 stainless, while 304H is the high carbon version of the 304 stainless. Carbon content is the only chemical difference between these three grades, leading 304L to perform better in corrosive environments and be easier to weld.


Why Is 304L Easier To Weld Than 304?


Answer:


The lower carbon content in 304L helps to remove the chromium carbide precipitation that occurs during the welding, putting 304L at lower risk for intergranular corrosion even in highly corrosive environments.

What Is The Yield Strength Of This Grade Stainless Steel?


Answer:


The yield strength for 304 stainless is 205 MPa (30 ksi).

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