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Hot Rolled Cold Drawn 304 Stainless Steel Bar Hexagon

In terms of stainless steel bar rolling standards, the US, UK, Germany, France, Russia, Japan and international standards are more advanced, and the US standard size tolerance is the most stringent.

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Hot Rolled Cold Drawn 304 Stainless Steel Bar Hexagon
We will continue to innovate and improve our 409 stainless steel plate, 301 stainless steel plate, ss Square Bar so as to provide our customers with the best products in the market. Each of our quality objectives must include the degree of meeting the product quality requirements and the quality management system requirements. We are able to recommend products that are appropriate for the actual use of our customers. We continue to transform advanced technologies at home and abroad into competitive products to meet the ever-increasing customer needs. We promise to deliver satisfactory products to your hands with the best quality and the fastest speed, and use the best solutions and the most enthusiastic and thoughtful after-sales service to solve the problems during use.

Product Description

In terms of stainless steel bar rolling standards, the US, UK, Germany, France, Russia, Japan and international standards are more advanced, and the US standard size tolerance is the most stringent. The latest standards for national stainless steel hot-rolled profiles are: ASTMA276 "Standard Specification for Stainless Steel and Heat-Resistant Steel Bars and Profiles"; American ASTM 484/A484M "General Requirements for Stainless Steel and Heat-Resistant Steel Bars, Billets and Forgings"; German DIN17440 "Technical Conditions for Delivery of Stainless Steel Sheet, Hot Rolled Strip, Wire, Drawn Wire, Steel Bar, Forging and Billet"; Japan JlS64304 "Stainless Steel Rod".


In the early 1980s, China combined the standards of the United States, Japan, Germany, the former Soviet Union and the International Organization for Standardization (ISO), and focused on the Japanese JIS stainless steel rod standards, and formulated the national standard GB1220-92 for stainless steel bars, with reference to foreign countries. Standards, the national standard GB4356-84 for stainless steel wire rods has been formulated, which makes the steel series more perfect, and adopts internationally-used brands such as the United States and Japan.


Some stainless steel grades in China correspond to American standard grades, as shown in Table 1. At the same time, it retains the commonly used grades in China, which is basically consistent with the stainless steel grades of developed countries such as the United States, and has greater versatility. Compared with developed countries, the gap between the standards itself has shrunk a lot, but the surface quality and dimensional tolerances are poor, and the difference in physical level is large.


Production Rang :

Size : 3mm-200mm, 1/8" to 8"

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

Bar production line process: billet acceptance → heating → rolling → double shearing → cooling → shearing → inspection → packaging → metering → storage.


Small bars are produced by small mills. The main types of small mills are: continuous, semi-continuous and horizontal. At present, most of the world's new and in-use small continuous rolling mills. Today's popular rebar mills have a universal high-speed rolling rebar mill and a 4-segment high-yield rebar mill. The billet used in the continuous small rolling mill is generally a continuous casting billet, and its side length is generally 130-160 mm, 180 mm×180 mm, the length is generally about 6-12 meters, and the billet weight is 1.5~3 tons.


The rolling lines are mostly arranged in a flat-upright manner, achieving full-line non-torsion rolling. The number of racks is determined by the principle of rolling one rack together. The rolling mills are mostly even-numbered passes. There are 18, 20, 22 or even 24 small mills for different blank sizes and finished sizes, and 18 are the mainstream. Speed-adjustable, micro-tension and tension-free rolling are the distinguishing features of modern all-continuous small mills. Part of the rough rolling and medium rolling frame is controlled by micro tension. The part of the medium rolling and the finishing mill are tension-free to ensure the dimensional accuracy of the product. Continuous mills generally have 6 to 10 loopers, and even up to 12 loopers.


Bar rolling is the easiest to implement in all rolled materials and can be done in a variety of ways. From three-roller to to-twist, from semi-continuous to full-continuous, bars can be produced, but their yield, dimensional accuracy, finished product, and pass rate are quite different. The rigidity of the three-roll mill is low, and the fluctuation of the heating temperature will inevitably lead to serious product size fluctuations.


In addition, the slow speed of the course and the long rolling time lead to an increase in the temperature difference between the head and the tail of the rolling stock, the size is inconsistent, and the performance is uneven. The output is very low, the quality fluctuates greatly, and the quality rate is extremely low. Full-continuous rolling mills generally adopt flat and alternate, the rolling parts are not twisted, the accidents are small, the output is high, and large-scale professional production and structural performance control can be realized.


At the same time, the rolling mill adopts high rigidity, the control degree is high, and the dimensional precision and The pass rate has been greatly improved, especially the yield rate has been increased, and the waste of steelmaking in the return furnace has been reduced. At present, bar rolling is mostly carried out by step-type heating furnace, high-pressure water descaling, low-temperature rolling, headless rolling and other new processes. Rough rolling and medium rolling are developed to adapt to large billets and improve rolling precision. Finishing mill Mainly to improve accuracy and speed.


Compared with ordinary carbon steel hot rolling, the rolling technology and process of stainless steel are mainly reflected in the inspection and cleaning of ingots, heating methods, roll hole design, rolling temperature control and on-line heat treatment of products.


We train our technicians from time to time to master the professional technical knowledge to guarantee the quality of our Hot Rolled Cold Drawn 304 Stainless Steel Bar Hexagon. We take building a first-class enterprise as our strategic vision, and our overall operation is stable and improving. We always adhere to the concept of sustainable development to lead the overall situation, in-depth practice of industrial transformation.
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