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SUS304 304L Stainless Steel C Cold Rolled Channel Bar

Cleaning lines include: shot blasting, infrared surface inspection, ultrasonic flaw detection and grinding grinders. As the level of continuous casting increases, if continuous casting can produce a defect-free billet, the billet cleaning line can be omitted.

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SUS304 304L Stainless Steel C Cold Rolled Channel Bar
Our product innovation seeks to continuously improve the overall performance and efficiency of our 321 stainless steel plate, Stainless Pipe, 304 stainless steel coil. Our products sell well at home and abroad, high quality and low price, excellent service and reliable reputation. We have senior industry application experience and an experienced after-sales team. Our company can make great use of existing resources for technological innovation and explore advanced methods of product processing.

Product Description

Stainless steel bar detailed Production Process Inspection and cleaning of ingot

Cleaning lines include: shot blasting, infrared surface inspection, ultrasonic flaw detection and grinding grinders. As the level of continuous casting increases, if continuous casting can produce a defect-free billet, the billet cleaning line can be omitted.
Heating method
Austenitic stainless steel is stable when heated and cannot be strengthened by quenching. This type of steel has good strength and toughness, excellent low temperature toughness, no magnetism, good processing, forming and welding properties, but it is easy to produce work hardening. At the same time, this type of steel has a very low thermal conductivity and is very ductile at low temperatures, so the heating rate can be faster than that of ferritic stainless steel, slightly lower than the heating rate of plain carbon steel.
Roll hole design
When producing stainless steel bars, the roll hole type generally adopts an elliptical-round hole type system. When designing the hole type, it is considered that the hole type has strong adaptability, and the replacement hole type and the rolling mill restart are minimized, that is, the hole type can be Adapted to a variety of products, allowing the hole type to have a larger gap adjustment, so that the entire product range to minimize the hole shape change of the pre-finishing mill.


Production Rang :

Size: 5# - 40#, 40 x 20 - 200 x 100

Standard: GB1220, ASTM A 484/484M, EN 10060/ DIN 1013 ASTM A276, EN 10278, DIN 671

Main Grade: 201, 304, 316, 316L, 310s, 430

Finish: Black, NO.1, mill finish, cold draw


Main grade description in different standard

ASTM

DIN / EN

JIS

GB

ISO Name

Other

S20100

201

1.4372

SUS201

S35350

X12CrMnNiN17–7-5

J1 L1 LH 201J1

S20200

202

1.4373

SUS202

S35450

X12CrMnNiN18–9-5

202 L4, 202 J4, 202 J3

S30400

304

1.4301

SUS304

S30408

X5CrNi18-10

06Cr19Ni10

0Cr18Ni9

S31603

316L

1.4404

SUS316L

S31603

X2CrNiMo17-12-2

022Cr17Ni12Mo2 00Cr17Ni14Mo2

S40900

409

-

SUH409

S11168

X5CrTi12

0Cr11Ti

S40910

409L

1.4512

SUH409L

S11163

X2CrTi12

00Cr11Ti

022Cr11Ti

S41008

410S

1.4000

SUS410S

S11306

X6Cr13

-

S43000

430

1.4016

SUS430

10Cr17

X6Cr17

1Cr17


Main grade chemical component in different standard

201

C %

Si%

Mn %

P %

S %

Ni %

Cr %

N %

Mo %

ASTM

0.15

1.00

5.5-7.5

0.050

0.030

3.5-5.5

16.0-18.0

0.25

-

DIN/EN

0,15

1,00

5,5-7,5

0,045

0,015

3,5-5,5

16,0-18,0

0,05-0,25

-

JIS

0.15

1.00

5.5-7.5

0.060

0.030

3.5-5.5

16.0-18.0

0.25

-

GB

0.15

1.00

5.5-7.5

0.050

0.030

3.5-5.5

16.0-18.0

0.05-0.25

-

202

C %

Si%

Mn %

P %

S %

Ni %

Cr %

N %

Mo %

ASTM

0.15

1.00

7.5-10.0

0.060

0.030

4.0-6.0

17.0-19.0

0.25

-

DIN/EN

0,15

1,00

7,5-10,5

0,045

0,015

4,0-6,0

17,0-19,0

0,05-0,25

-

JIS

0.15

1.00

7.5-10.0

0.060

0.030

4.0-6.0

17.0-19.0

0.25

-

GB

0.15

1.00

7.5-10.0

0.050

0.030

4.0-6.0

17.0-19.0

0.05-0.25

-

304

C %

Si%

Mn %

P %

S %

Ni %

Cr %

N %

Mo %

ASTM

0.08

0.75

2.00

0.045

0.030

8.0 - 10.5

18.0-20.0

0.10

-

DIN/EN

0,07

1,00

2,00

0,045

0,015

8,0 - 10,5

17,5-19,5

0,10

-

JIS

0.08

1.00

2.00

0.045

0.030

8.0 - 10.5

18.0-20.0

-

-

GB

0.08

1.00

2.00

0.045

0.030

8.0 - 10.0

18.0-20. 0

-

-

316L

C %

Si%

Mn %

P %

S %

Ni %

Cr %

N %

Mo %

ASTM

0.030

0.75

2.00

0.045

0.030

10.0-14.0

16.0-18.0

0.10

2.00-3.00

DIN/EN

0,030

1,00

2,00

0,045

0,015

10,0-13,0

16,5-18,5

0,10

2,00-2,50

JIS

0.030

1.00

2.00

0.045

0.030

12.0-15.0

16.0-18.0

-

2.00-3.00

GB

0.030

0.75

2.00

0.045

0.030

10.0-14.0

16.0-18.0

0.10

2.00-3.00

409

C %

Si%

Mn %

P %

S %

Ni %

Cr %

N %

Ti %

ASTM

0.08

1.00

1.00

0.045

0.03

0.50

10.5-11.7

-

6*C% - 0.75

DIN/EN

-

-

-

-

-

-

-

-

-

JIS

0.08

1.00

1.00

0.040

0.030

-

10.5-11.7

-

6*C% - 0.75

GB

0.08

1.00

1.00

0.045

0.030

0.60

10.5-11.7

-

6*C% - 0.75

409L

C %

Si%

Mn %

P %

S %

Ni %

Cr %

N %

Ti %

ASTM

0.03

1.00

1.00

0.040

0.020

0.50

10.5-11.7

0.03

6*(C+N)-0.5

DIN/EN

0.03

1.00

1.00

0.040

0.015

-

10.5-12.5

-

6*(C+N)-0.65

JIS

0.03

1.00

1.00

0.040

0.030

-

10.5-11.7

-

6*C% - 0.75

GB

0.03

1.00

1.00

0.040

0.020

-

10.5-11.7

0.03

Ti≥8*(C+N)

410S

C %

Si%

Mn %

P %

S %

Ni %

Cr %

N %

Mo %

ASTM

0.08

1.00

1.00

0.040

0.030

0.60

11.5-13.5

-

-

DIN/EN

0,08

1,00

1,00

0,040

0,015

-

12,0-14,0

-

-

JIS

0.08

1.00

1.00

0.040

0.030

-

11.5-13.5

-

-

GB

0.08

1.00

1.00

0.040

0.030

0.60

11.5-13.5

-

-


Main grade mechanical property in different standard

201

Y.S./Mpa ≥

T.S./Mpa ≥

E.L./% ≥

HB ≤

HRB ≤

HBW ≤

HV ≤

ASTM

260

515

40

-

95

217

-

JIS

275

520

40

241

100

-

253

GB

205

515

30

- 

99

-

- 

202

Y.S./Mpa ≥

T.S./Mpa ≥

E.L./% ≥

HB ≤

HRB ≤

HBW ≤

HV ≤

ASTM

260

620

40

-

-

241

-

JIS

275

520

40

-

95

207

218

GB

-

-

-

-

-

-

-

304

Y.S./Mpa ≥

T.S./Mpa ≥

E.L./% ≥

HB ≤

HRB ≤

HBW ≤

HV ≤

ASTM

205

515

40

-

92

201

-

JIS

205

520

40

187

90

-

200

GB

205

515

40

-

92

201

210

316L

Y.S./Mpa ≥

T.S./Mpa ≥

E.L./% ≥

HB ≤

HRB ≤

HBW ≤

HV ≤

ASTM

170

485

40

-

95

217

-

JIS

175

480

40

187

90


200

GB

170

485

40

-

95

217

220

409

Y.S./Mpa ≥

T.S./Mpa ≥

E.L./% ≥

HB ≤

HRB ≤

HBW ≤

HV ≤

ASTM

-

-

-

-

-

-

-

JIS

175

360

22

162

80

-

175

GB

-

-

-

-

-

-

-

409L

Y.S./Mpa ≥

T.S./Mpa ≥

E.L./% ≥

HB ≤

HRB ≤

HBW ≤

HV ≤

ASTM

170

380

20

-

88

179

-

JIS

175

360

25

162

80

-

175

GB

170

380

20

-

88

179

200

410S

Y.S./Mpa ≥

T.S./Mpa ≥

E.L./% ≥

HB ≤

HRB ≤

HBW ≤

HV ≤

ASTM

205

415

22

-

89

183

-

JIS

205

410

20

-

88

183

200

GB

205

415

20

-

89

183

200


Production Process and Feature

Rolling temperature control

When stainless steel is rolled, its deformation resistance is quite sensitive to temperature changes. Especially in rough rolling, due to the low rolling speed, the temperature rise caused by deformation work is not enough to compensate the temperature drop of the rolling stock itself, resulting in a large head-to-tail temperature difference. Product tolerances have an adverse effect and surface defects and internal defects can also occur on the rolled stock, affecting the uniformity of the final product performance.


In order to solve the above problems, the heated billet is subjected to rough rolling, and then enters a fuel (or gas) holding furnace or an induction reheating furnace which is disposed between the rough rolling and the intermediate rolling, and the temperature is uniformized before entering the medium rolling unit. Rolling. In order to control the excessive temperature rise of the rolled parts during the finish rolling and pre-finishing, a water-cooling device (water tank) is generally provided between the two sets of rolling mills and between the finishing mill stands. Therefore, reasonable control of the grain size can be achieved in order to improve the technical performance of the final product.

Online heat treatment of stainless steel

In the past, the heat treatment of stainless steel bars was carried out offline. With the development of science and the deepening of rolling process research, modern stainless steel heat treatment is also carried out online. When producing bar, for austenitic and ferritic stainless steel, it is not easy to produce cold cracking and self-pointing, air cooling or stack cooling after rolling, or water cooling device before flying shear to achieve residual heat quenching; production In the case of martensitic stainless steel, it is easy to produce cold cracking, and cannot be directly cooled into the cooling bed by water cooling. The structure of the cooling bed is different from the cold bed for producing carbon steel. One method is to adopt an improved stepped rack.


A cold bed, such as the cold bed of the US Teledyne AIIvac plant, which was designed by Danieli in Italy in 1989, protrudes into a tank on the high temperature side. The tank can be filled with water to submerge the cold bed in the water, so that the austenitic stainless steel can be carried out. Water quenching, but not water quenching, directly enters the cooling bed. The cooling bed can also be equipped with a heat-insulating hood to delay the cooling of the rolling stock. When the insulating cover is used for delayed cooling, the cooling rate is half of the natural cooling rate. The lower cooling rate is very important to ensure the hysteresis brittle crack of the martensitic stainless steel; the other method is: design one half of the cooling bed into a chain type, and the other half is a common rack type cooling bed.


The roller conveyor is provided with a heat preservation cover. When the martensite stainless steel is produced, the flying shears cut the rolled piece into a double ruler or a fixed length. If it is a multiple ruler, the chain type cold bed is quickly pulled into the heat preservation cover, and cut into a cover in the cover. The ruler is then sent to the thermal insulation pit, and the fixed ruler is directly pulled into the thermal insulation pit for slow cooling.


SUS304 304L Stainless Steel C Cold Rolled Channel Bar are mainly exported to all parts of the world, our company are in line with the business philosophy of 'survival by quality and reputation' and our company has won the unanimous praise of our customers for many years. Our company carries out product research and development and production with continuous innovation, provides customers with multi-level value and becomes a reliable professional intelligent partner of customers. Meeting customers' needs with advanced technology, mature products and perfect services is our company's business tenet.
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