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Carbon Structural Steel

Carbon structural steel has moderate carbon content, has good comprehensive performance, and the properties of strength, toughness, weld ability and so on match very well and the application is the most extensive., which are mainly used in the manufacture of welded pipe and used as stock for cold rolling, etc.

The size range is (1.5~8.5)*127~315mm, and the main grades, standards and chemical composition are as follows:

Grade
GB/T 700

Similar grade

Chemical composition (%)

ASTM
A283M

JIS
G3101

DIN
10025

C

Mn

Si

Ni

P

S

Cr

DF01

 

 

 

≤0.10

0.25-0.55

≤0.12

 

≤0.040

≤0.040

 

DF02

 

 

 

0.09-0.15

0.25-0.55

≤0.10

 

≤0.040

≤0.040

 

Q195

Gr.B

SS 300

S185

0.06-0.12

0.25-0.50

≤0.30

≤0.30

≤0.05

≤0.05

≤0.30

Q215A

Gr.C

SS 300

 

0.09-0.15

0.25-0.55

≤0.30

≤0.30

≤0.05

≤0.05

≤0.30

Q235A

Gr.D

SS 400

 

0.14-0.22

0.30-0.65

≤0.30

≤0.30

≤0.05

≤0.05

≤0.30

Q255A

 

SS 400

 

0.18-0.28

0.40-0.70

≤0.30

≤0.30

≤0.05

≤0.05

≤0.30

Q275A

 

SS 490

 

0.28-0.38

0.50-0.80

≤0.35

≤0.30

≤0.05

≤0.05

≤0.30

S235JR

 

 

 

0.08-0.15

0.40-0.80

0.10-0.30

 

≤0.03

≤0.03

 

 

Low Alloyed High Strength Structural Steel

Low alloyed high strength structural steel has the advantages of high strength, good comprehensive performance, long lifetime, wide application scope, more economic and so on, which are mainly used in the manufacture of welded pipe, steel structure, etc.

The size range is (1.5~8.5)*127~315mm, and the main grades, standards and chemical composition are as follows:

Grade
GB/T 1591

Similar grade

Chemical composition (%)

ASTM
A529M

JIS
G3135

DIN
10025

C

Mn

Si

Nb

V

P

S

Ti

Q295A

Gr42

SPFC490

E295

≤0.16

0.80-1.50

≤0.55

0.015-0.060

0.02-0.15

0.045

0.045

0.02-0.20

Q345A

Gr50

SPFC590

E335

≤0.20

1.00-1.60

≤0.55

0.015-0.060

0.02-0.15

0.045

0.045

0.02-0.20

Q390A

 

SYKT540

 

≤0.20

1.00-1.60

≤0.55

0.015-0.060

0.02-0.15

≤0.05

≤0.05

0.02-0.20

Q420A

Gr60

 

 

≤0.20

1.00-1.70

≤0.55

0.015-0.060

0.02-0.15

≤0.05

≤0.05

0.02-0.20

 

High Quality Carbon Structural Steel

Carbon structural steel is also namely high quality carbon structural steel, which has good mechanical properties and machining performance. It is mainly used for various mechanical structures, chain, metal products and all kinds of tools, building, bridge, boiler, vessel, etc.

The size range is (1.5~8.5)*127~315mm, and the main grades, standards and chemical composition are as follows:

Grade
GB/T 700

Similar grade

Chemical composition (%)

Mechanical properties

ASTM
A29

JIS
G4051

DIN
10083

C

Mn

Si

Ni

P

S

Cr

Rm
Mpa

Rel
Mpa

A5
%

Z
%

HB

 

10

1010

S10C

GK10

0.07-0.13

0.35-0.65

0.17-0.37

0.25

0.035

0.035

0.25

335

195

32

 

 

20

1020

S20C

GK20

0.17-0.23

0.35-0.65

0.17-0.37

0.25

0.035

0.035

0.25

410

245

28

 

 

40

1040

S40C

GK40

0.37-0.44

0.50-0.80

0.17-0.37

0.25

0.035

0.035

0.25

597

 

19

 

 

45

1045

S45C

GK45

0.42-0.50

0.50-0.80

0.17-0.37

0.25

0.035

0.035

0.25

600

 

17

 

 

50

1050

S50C

GK50

0.47-0.55

0.50-0.80

0.17-0.37

0.25

0.035

0.035

0.25

625

 

16

 

 

60

1060

S60C

GK60

0.57-0.65

0.50-0.80

0.17-0.37

0.25

0.035

0.035

0.25

675

 

12

 

 

N070D

 

 

GK70

0.70-0.74

0.46-0.55

0.15-0.30

0.10

0.020

0.020

0.10

715

 

9

 

 

C1074

 

 

 

0.69-0.80

0.50-0.80

0.17-0.37

0.25

0.030

0.030

0.25

 

 

 

 

 

20Mn

1022

 

 

0.17-0.24

0.70-1.00

0.17-0.37

0.25

0.035

0.035

0.25

450

 

24

 

 

40Mn

1043

42B

C40

0.37-0.44

0.70-1.00

0.17-0.37

0.25

0.035

0.035

0.25

590

 

17

 

 

45Mn

1046

47B

C45

0.42-0.50

0.70-1.00

0.17-0.37

0.25

0.035

0.035

0.25

 

 

 

 

 

65Mn

1566

 

 

0.62-0.70

0.90-1.20

0.17-0.37

0.25

0.035

0.035

0.25

735

 

9

 

 

 

Alloyed Structural Steel

Alloyed structural steel has good mechanical properties and machining property, which is mainly used for all kinds of high- hardness packing strips, blade, chain piece, cutting die, boiler tube, all kinds of automotive parts including angle adjusting device for car seats, etc.

The size range is (1.5~8.5)*127~315mm, and the main grades, standards and chemical composition are as follows:

Grade
GB/T 3077

Similar grade

Chemical composition (%)

Mechanical properties

ASTM
A29M

JIS
G4106

DIN
10028

C

Mn

Si

Ni

P

S

Cr

Rm
Mpa

Rel
Mpa

A5
%

Z
%

HB

 

 

20Mn2

1524

SMn420

P355GH

0.17-0.24

1.40-1.80

0.17-0.37

0.25

0.035

0.035

0.25

785

590

10

40

187

30Mn2

1330

SMn433

28Mn6

0.27-0.34

1.40-1.80

0.17-0.37

0.25

0.035

0.035

0.25

785

635

12

45

207

20CrMoD

 

SCM420

25CrMo4

0.17-0.24

0.40-0.70

0.17-0.37

0.25

0.035

0.035

0.80-1.10

885

685

12

50

197

30CrMoD

4130

SCM430

34CrMo4

0.26-0.34

0.40-0.70

0.17-0.37

0.25

0.035

0.035

0.80-1.10

930

735

12

50

229

35CrMoD

4137

SCM430

34CrMo4

0.32-0.40

0.40-0.70

0.17-0.37

0.25

0.035

0.035

0.80-1.10

980

835

12

45

229

42CrMoA

4140

SCM440

42CrMo4

0.38-0.45

0.60-0.80

0.17-0.37

0.25

0.035

0.035

0.80-1.10

1080

930

12

45

217

16MnCr5

 

 

 

0.14-0.19

1.00-1.30

0.35

0.10

0.020

0.020

0.80-1.10

 

 

 

 

 

40Cr

5140

SCr440

41Cr4

0.37-0.44

0.50-0.80

0.17-0.37

0.25

0.030

0.030

0.80-1.10

980

785

9

45

207

20MnBD

 

 

 

0.17-0.22

0.80-1.20

0.25

0.25

0.035

0.035

0.25

 

 

 

 

 

40MnBD

1541B

 

39MnCr-B6

0.37-0.44

1.10-1.40

0.17-0.37

0.25

0.035

0.035

0.25

980

785

10

45

207

15CrMoG

 

 

 

0.12-0.18

0.40-0.60

0.17-0.37

0.25

0.035

0.035

0.25

440

295

 

 

 

 

Spring Steel

Spring steel mainly has good elasticity, and since it is used under the condition of the dynamic load, the main requirement to the material of manufacturing spring is to have high yield strength; it have no plastic deformation when under heavy load; it should have high fatigue strength, and has long lifetime under the frequent load; it should have enough toughness and plasticity to avoid sudden brittle fracture under the impact force.

Spring steel is mainly used in the manufacture of all kinds of springs such as helical springs for automotive, locomotive and tractor, spring for automotive safety belt, some important springs working under high stress, and springs subject to serious wear.

The size range is (1.5~8.5)*127~315mm, and the main grades, standards and chemical composition are as follows:

grade
GB1222

Similar grade

Chemical composition (%)

ASTM
A29M

JIS
G4801

DIN
17221

C

Mn

Si

V

Ni

P

S

Cr

 

50CrVD

6150

SUP10

50CrV4

0.46-0.54

0.50-0.80

0.17-0.37

0.10-0.20

 

≤0.040

≤0.040

0.80-1.10

Super6

 

 

 

0.58-0.64

0.67-0.90

1.70-1.90

 

 

≤0.040

≤0.040

0.13-0.25

62Si2MnA

9260

SUP6

60SiCr7

0.60-0.64

0.70-0.90

1.65-1.90

 

≤0.30

≤0.05

≤0.05

≤0.35

 

Carbon Tool Steel

Production cost of carbon tool steel is lower, and sources of raw materials are convenient; this steel is easy for cold and hot machining, and can obtain quite high hardness after heat treatment; Under the work condition not heated up to high temperature, the wear resistance is also good, thus it is widely used. It is mainly used for making blades and sawing blades with small size and simple shape, also used in textile accessories.

The size range is (1.5~8.5)*127~315mm, and the main grades, standards and chemical composition are as follows:

Grade
GB/T 1298

Similar grade

Chemical composition (%)

Hardness

ASTM
A686

JIS
G4401

DIN
17350

C

Mn

Si

Ni

P

S

Cr

HB

T7A

 

SK7

C70W2

0.65-0.74

0.40

0.35

0.20

0.035

0.03

0.25

207

T8A

T72301W1A-8

SK5

C80W1

0.75-0.84

0.40

0.35

0.20

0.035

0.03

0.25

207

T10A

T72301W1A-9

SK4

C105W1

0.95-1.04

0.40

0.35

0.20

0.035

0.03

0.25

223

 

Cold Heading Steel

Cold heading steel strip has excellent cold formability, mainly used in industries including automotive, shipbuilding, equipment manufacturing, electronics, electrical appliances, bicycles, tools, light steel structure, construction, etc.

The size range is (1.5~8.5)*127~315mm, and the main grades, standards and chemical composition are as follows:

Grade
GB/T 6478

Similar grade

Chemical composition (%)

ASTM
A29M

JISG

DIN
1654-4

C

Mn

Si

Cr

P

S

ML40Cr

5140

 

37Cr4

0.37-0.44

0.50-0.80

0.30

0.80-1.10

0.035

0.035

 

Free Cutting Steel

Free cutting steel is a kind of alloyed steel adding a certain amount of one kind or more kinds of free cutting elements into the steel including sulphur, phosphorus, lead, calcium, selenium, tellurium and so on, to improve its cutability. This kind of steel can be machined by cutting with higher cutting speed and deeper cutting depth. Due to adding free cutting elements into steel, cutting resistant force of steel decreases, and at the same time the free cutting elements and the formed compound can work as a lubrication for the cutting tool, and crumbs are easily broken and the wear is reduced, which accordingly reduce the surface roughness of work piece and improve the service life of knives and the efficiency of production. It is mainly used for metal wares such as: garden tools, barbecue oven rack, screwdriver, key, etc.

The size range is (1.5~8.5)*127~315mm, and the main grades, standards and chemical composition are as follows:

grade
 

standard

Chemical composition (%)

C

Mn

Si

P

S

SUM23HS

Technical agreement

≤0.09

1.00-1.50

≤0.05

0.04-0.09

0.35-0.42

 

High Weathering Structural Steel

High weathering steel is a kind of steel into which a small amount of alloy elements are added, such as Cu, P, Cr, Ni, etc., forming the protective layer on the surface of metallic matrix to improve the plate performance of weathering resistance. It is mainly used for boiler tube, container, etc.

The size range is (1.5~8.5)*127~315mm, and the main grades, standards and chemical composition are as follows:

grade
GB/T 4171

Similar grade

Chemical composition (%)

Mechanical properties

ASTM
A690M

JIS
G3125

DIN
10155

C

Mn

Si

Cr

Ni

P

S

Rm
Mpa

Rel
Mpa

09CuPCrNiA

A690M

SPA-H

S355JOWP

≤0.12

0.20-0.50

0.25-0.75

0.30-1.25

≤0.65

0.07-0.15

≤0.035

480

343

Automotive Strip

Automotive steel is a kind of steel into which a small amount of alloy elements are added, such as Nb, to make the material having the characteristics of high strength and high toughness. The product has been a localized material jointly developed by the Shanghai University, Shanghai Huizhong and NISCO since 2003, NISCO passed the product certification by German Volkswagen in 2009 and has been the qualified supplier to Shanghai Huizhong Automotive Manufacturing Co., Ltd. since 2009, and in 2013 NISCO won the "excellent supplier" title of the Company, with the products involved in several models of Shanghai Volkswagen, SAIC Motor and Shanghai General Motor, which can meet the various requirements of users and the product has passed the certification of TS16949 automotive system.

The size range is (1.5~8.5)*127~315mm, and the main grades, standards and chemical composition are as follows:

Grade

Standard

Mechanical properties

Rm

Mpa

Rel
Mpa

A
%

TL1114Nb

Technical agreement

520-620

≥360

≥25

 

 

 

 

Alloyed Tool Steel

Alloyed tool steel is a kind of carbon tool steel into which alloy elements are added, including chromium, molybdenum, tungsten, vanadium and so on, to improve the hardenability, toughness, wear resistance and heat resistance. It is mainly used in the manufacture of measuring tools, blade and saw, cutting tool, shock resistant tool, cold and hot die, and some tools for special application. 

The main grades, standards and chemical composition are as follows:

Grade

Standard

Specification (mm)

NHY01

GB/T 1299

(1.5~8.5)*127~315

NS01

NS02

9SiCr