T-bolt

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 **1.4 in ***1 class 2 (ASTM ***3 Class2)
①Tensile strength (PSI)≥**0MPa
②Yield strength≥**2MPa
③Elongation2"≥*2%
④Reduction of cross section≥*5%
⑤Requirements of cold blending: *5°, no cracking. Diameter of blending core= diameter of screw
⑥Raw material: *5#, *5#, *0MnTiB, etc
 
2. AREA ***1 standard Strength Grade：SAE J**9 Class 5
①1/4"~1" Tensile strength (PSI)≥**8Mpa, Yield strength≥**5MPa;
②>1"~**1/2" Tensile strength (PSI)≥**5Mpa, Yield strength≥**9MPa;
③Elongation2"≥*4%
④Reduction of cross section≥*5%
⑤Requirements of cold blending: *5°, no cracking.
Diameter of blending core= diameter of screw
⑥Surface hardness: HRC: size of 1/4～1"≤*4; size of >1"~**1/2"≤*0;
⑦Core hardness: HRC: size of 1/4～1": *5~*4; size of >1"~**1/2"≤*0
(no requirements with the minimum hardness when examination);
⑧Raw material: *5#, *0MnTiB, *0Cr, etc
 
3. AREA ***1 standard Strength Grade：SAE J**9 Class 8
①Tensile strength (PSI)≥***5.2MPa
②Yield strength≥**7.2MPa
③Elongation2"≥*2%
④Reduction of cross section≥*5%
⑤Requirements of cold blending: *5°no cracking.
Diameter of blending core= diameter of screw
⑥Surface hardness: HRC:≤*9;
⑦Core hardness: HRC: *3~*9;
(no requirements with the minimum hardness when examination);
⑧Raw material: *5#, *5CrMo, *2CrMo,etc
 
Grade description (technical requirements) of GB, DIN, ISO
1. Grade: Class 4.6
①Raw material: Q**5, Q**5, *0#
②Mechanical capacity:
Tensile strength (PSI)≥**0MPa
Yield strength≥**0MPa
Elongation≥*2%
Brinell Hardness HB******9
2. Grade: Class 4.8
①Raw material: Q**5, Q**5
②Mechanical capacity:
Tensile strength (PSI)≥**0MPa
Yield strength≥**0MPa
Brinell Hardness HB******9
3. Grade: Class 5.6
①Raw material: *5# Q**5B（*6Mn）
②Mechanical capacity:
Tensile strength (PSI)≥**0MPa
Yield strength≥**0MPa
Elongation≥*0%
Brinell Hardness HB******9
4. Grade: Class 5.8
①Raw material: *5#, *5#
②Mechanical capacity:
Tensile strength (PSI)≥**0MPa
Yield strength≥**0MPa
Brinell Hardness HB******9
5. Grade: Class 6.8
①Raw material: *5#
②Mechanical capacity:
Tensile strength (PSI)≥**0MPa
Yield strength≥**0MPa
Brinell Hardness HB******8
6. Grade: Class 8.8
①Raw material: *5# *0Cr *0MnTiB
②Mechanical capacity:
A) Diameter≤*6
Tensile strength (PSI)≥**0MPa
Yield strength≥**0MPa
Elongation≥*2%
Reduction of cross section≥*2%
Rockwell hardness HRC****2
Brinell Hardness HB******4
B) Diameter＞*6
Tensile strength (PSI)≥**0Mpa
Yield strength≥**0MPa
Elongation≥*2%
Reduction of cross section≥*2%
Rockwell hardness HRC****4
Brinell Hardness HB******8
7. Grade: Class *0.9
①Raw material: *0Cr, *0MnTiB, *5CrMo, *2CrMo
②Mechanical capacity:
Tensile strength (PSI)≥***0MPa
Yield strength≥**0MPa
Elongation≥9%
Reduction of cross section≥*8%
Rockwell hardness HRC****9
Brinell Hardness HB******1
 
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：*2 hours, non-rusting
3. Hot galvanizing.
Salt spray test time：**0 hours, **0hours, **0hours, non-rusting
4. Dacromet.
Salt spray test time：**0 hours, **0hours, **0hours, ***0hours, non-rusting
5. Black electric melting.
Salt spray test time：**0 hours, **0hours, **0hours, ***0hours, 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.