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 Domestic: 0086-512-80639917
 Foreign trade: 0086-512-52818600
 Korea Segment: 0086-512-52818873
 Vietnam Hanoi: 0084-4-37228729
 Vietnam Hanoi Fox: 0084-4-37228728
 Ho Chi Minh: 0084-8-35470084
 Ho Chi Minh Fox: 0084-8-35470132
 Telephone exchange:
 0086-512-52815587/80639918
 Fax: 0086-512-52818206
 E-mail: zhouyang@zhouyangsteel.com
 

In order to meet the stable demand of spring flat bars from foreign customers, our company has been integrated material resources of billet in competitive price and produce in large amount. We have long-time cooperation with domestic steel mills which guaranteed quality and delivery time. Meanwhile, we ourselves are strict on raw material and quality. We usually stock with regular dimensions for meet the customers’ demands on min 1T. At present, the spring flat bars has been widely used on auto fittings, auto manufacturing, hardware tools, chain manufacturing and other machinery manufacturing industry. At present, the dimensions of spring flat bars that our company is able to supply are as follows:
65Mn、60Si2Mn、60Si2MnA、55SiCr、55CrMn、55CrMnA、60CrMnA、50CrV、50CrVA、65F、60C2、60C2A、55XFA、50XΦA、SUP7、S65C-CSP、SAE1566、60C2、SAE9260、SUP9、SAE5155、SUP10、SAE5155、SAE6150、GCr15、SUJ2、SAE52100、ISO100Cr6、En100Cr6、ⅢX15
、C60E4、C60E、61SiCr7、55Cr3、1.7176、51CrV4、1.8159 and so on.
We can supply size as follow:
Spring flat bar steel:Thicknes:5mm-30mm;   Wid: 40mm-200mm;
SPRING WIRE: Ф0.9mm-Ф25mm;
ROUND BAR: Ф6mm-Ф250mm;
SPRING PLATE STEEL:Thickness:8mm-40mm;  Wide:1250-2000MM。
CROSS PROFILES:  Thickness 250 mm

SPRING FLAT STEEL 
Dimension Tolerance:

sectional dimension

mm

allowable deviation

sectional dimension

mm

allowable deviation

sectional dimension

mm

允许偏差

width≤50

width>50~60

width>60~70

Thickness

6~8

±0.15

6~7

±0.15

6~7

±0.18

8~12

±0.18

7~9

±0.18

7~12

±0.20

12~20

±0.20

9~20

±0.20

12~20

±0.25

20~30

±0.20

20~30

±0.25

20~30

±0.30

30

30

30

±0.30

Width

50

±0.55

50~60

±0.60

60~70

±0.75

sectional dimension

mm

allowable deviation

sectional dimension

mm

allowable deviation

sectional dimension

mm

allowable deviation

sectional dimension

mm

allowable deviation

width70~80

width80~90

width90~100

width100

Thickness

8~10

±0.20

7~12

±0.20

7~12

±0.20

7~12

±0.20

10~12

±0.25

12~20

±0.25

12~20

±0.25

12~20

±0.25

12~20

±0.30

20~30

±0.30

20~30

±0.30

20~30

±0.30

20~30

±0.35

30

±0.35

30

±0.35

30

±0.35

30

±0.40

Width

70~80

±0.80

80~90

±0.80

90~100

±0.80

100

±1.0

Grade Comparison And Chemical Composition:

中国GB

ASTM

JIS

EN

C

Si

Mn

Cr

V

P

S

HB

65Mn

1566

S65C

C60E

0.62-0.70

0.17-0.37

0.90-1.20

≤0.25

0.035

0.035

302

60Si2Mn

9260

SUP7

61SiCr7

0.56-0.64

1.50-2.00

0.70-1.0

≤0.35

0.025

0.025

321

60Si2MnA

9260

SUP7

61SiCr7

0.56-0.64

1.60-2.00

0.70-1.0

≤0.35

0.025

0.025

321

55CrMnA

5155

SUP9

55Cr3

0.52-0.60

0.17-0.35

0.65-0.95

0.65-0.95

0.025

0.025

321

60CrMnA

5160

SUP9A

60Cr3

0.56-0.64

0.17-0.37

0.70-1.00

0.70-1.00

0.025

0.025

321

50CrVA

6150

SUP10

51CrV4

0.46-0.54

0.17-0.37

0.50-0.80

0.80-1.10

0.10-0.20

0.025

0.025

321

60Si2CrA

54SiCr6

0.56-0.64

1.40-1.80

0.40-0.70

0.70-1.00

0.025

0.025

321

28MnSiB

0.24-0.32

0.60-1.2

1.2-1.6

B (0.0005-0.0035)

0.035

0.035

At the same time, Because the spring steel HRC is too high to hard process. Our company will supply the service of  “annealing+straightening”
Copyright © Changshu Fengyang Special Steel Co., Ltd All rights reserved.    Website: www.zhouyangsteel.com    Manager
Address: 33# HaiYu North Road, Changshu City, Jiangsu Province, China    Tel: 0086-512-52815587    Fax: 0086-512-52818206