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 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

 

For any non-standard railway parts, if you provide us with drawings or samples,

we can manufacture according to your requirements. We are sincerely waiting for your enquiry.