T-bolts
T-bolts
T-bolts

T-bolts

Negotiable /Ton

Min.Order:1 Ton

Supply Ability:
0 Ton / Tons per Month
Payment Terms:
T/T L/C D/P D/A
Delivery Detail:
7 days

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Place of Origin:
China
Model Number:
all

Suzhou Zhonhui Railway Parts Co.,Ltd

Business Type: Trading Company
Main Products: railway fasteners ,bolts ,nuts ,screws clips.clamps

Product Details

Product description 

 

Being a professional railway parts company, we can offer products in different models with any grade. 

The technical requirements of different grades are as following:

 

Grade description (technical requirements) of ASTM

1. AREA 4-1.4  in 1991 class 2 (ASTM 1183 Class2)

①Tensile strength (PSI)≥760MPa

②Yield strength≥552MPa

③Elongation2"≥12%

④Reduction of cross section≥25%

⑤Requirements of cold blending: 45°, no cracking. Diameter of blending core= diameter of screw

⑥Raw material: 35#, 45#, 20MnTiB, etc 

 

2. AREA 1991 standard   Strength Grade:SAE J429 Class 5

①1/4"~1"  Tensile strength (PSI)≥828Mpa, Yield strength≥635MPa;

②>1"~1-1/2" Tensile strength (PSI)≥725Mpa, Yield strength≥559MPa;

③Elongation2"≥14%

④Reduction of cross section≥35%

⑤Requirements of cold blending: 45°, no cracking. 

Diameter of blending core= diameter of screw

⑥Surface hardness: HRC: size of 1/4~1"≤34;  size of >1"~1-1/2"≤30;

⑦Core hardness: HRC: size of 1/4~1": 25~34;  size of >1"~1-1/2"≤30 

 (no requirements with the minimum hardness when examination);

⑧Raw material: 45#, 20MnTiB, 40Cr, etc

 

3. AREA 1991 standard    Strength Grade:SAE J429 Class 8

①Tensile strength (PSI)≥1035.2MPa

②Yield strength≥897.2MPa

③Elongation2"≥12%

④Reduction of cross section≥35%

⑤Requirements of cold blending: 45°no cracking. 

Diameter of blending core= diameter of screw

⑥Surface hardness: HRC:≤39;

⑦Core hardness: HRC: 33~39; 

(no requirements with the minimum hardness when examination);

⑧Raw material: 45#, 35CrMo, 42CrMo, etc

 

Grade description (technical requirements) of GB, DIN, ISO

1. Grade: Class 4.6

① Raw material: Q235, Q275, 20#

② Mechanical capacity:

        Tensile strength (PSI)≥400MPa

        Yield strength≥240MPa

        Elongation≥22%

        Brinell Hardness HB114-209

2. Grade: Class 4.8

① Raw material: Q235, Q275

② Mechanical capacity:

        Tensile strength (PSI)≥420MPa

        Yield strength≥340MPa

        Brinell Hardness HB124-209

3. Grade: Class 5.6

① Raw material: 35#  Q345B(16Mn)

② Mechanical capacity:

        Tensile strength (PSI)≥500MPa

        Yield strength≥300MPa

        Elongation≥20%

        Brinell Hardness HB147-209

4. Grade: Class 5.8

① Raw material: 35#, 45#  

② Mechanical capacity:

        Tensile strength (PSI)≥520MPa

        Yield strength≥420MPa

        Brinell Hardness HB151-209

5. Grade: Class 6.8

① Raw material: 45#  

② Mechanical capacity:

        Tensile strength (PSI)≥600MPa

        Yield strength≥480MPa

        Brinell Hardness HB181-238

6. Grade: Class 8.8

① Raw material: 45#  40Cr  20MnTiB

② Mechanical capacity: 

     A) Diameter≤16

Tensile strength (PSI)≥800MPa

        Yield strength≥640MPa

        Elongation≥12%

       Reduction of cross section≥52%

Rockwell hardness HRC22-32

Brinell Hardness HB238-304

B) Diameter>16

Tensile strength (PSI)≥830Mpa

Yield strength≥660MPa 

Elongation≥12% 

Reduction of cross section≥52%

Rockwell hardness HRC23-34

Brinell Hardness HB242-318

7. Grade: Class 10.9

① Raw material: 40Cr, 20MnTiB, 35CrMo, 42CrMo

② Mechanical capacity: 

Tensile strength (PSI)≥1040MPa

        Yield strength≥940MPa

        Elongation≥9%

       Reduction of cross section≥48%

Rockwell hardness HRC32-39

Brinell Hardness HB304-361

 

Besides, we can offer five different surface treatments as following:

1. Black coating.

2. Plating white zinc or yellow zinc (color-zinc).  

Salt spray test time:72 hours, non-rusting

3. Hot galvanizing.  

Salt spray test time:120 hours, 380hours, 500hours, non-rusting

4. Dacromet.   

Salt spray test time:120 hours, 380hours, 500hours, 1000hours, non-rusting

5. Black electric melting.  

Salt spray test time:120 hours, 380hours, 500hours, 1000hours, non-rusting

Contact Supplier

Rita Fung Chat Now
Telephone
86-0512-52131172
Address
Shaoxing,Zhejiang

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