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ITEM

TYPE
 Standard
 Size range
 Property
 Material
 
Stud (full thread) Bolt
 GB901/953
 M12~M160
 6.8~10.9
 Internal Steels:

Carbon Steel:

Q345(16Mn),25#,35#,45

Alloy Steel:

20MnTiB,35VB,40Cr,45MnMo, 30CrMoA,35CrMoA,42CrMoA

25Cr2MoVA

Stainless Steel:

0Cr18Ni9, 0Cr17Ni12Mo2,

00Cr19Ni10, 00Cr17Ni12Mo2

Fe-Basic Alloy:

GH/T2132

Ni-Basic Alloy:

GH/T2312, GH80A

Overseas Steels:

ASTM A307/A563

ASTM A193-B7/A194-2H (-7)

ASTM A193-B7M/A194-2HM

ASTM A193-B16/A194-4

ASTM A320-L7/A194-4 (-7)

ASTM A193-B8/A194-8 (LN)

ASTM A193-B8M/A194-8M (LN)

ASTM A453-Gr. 660

ASTM B637-UNS NO7080

AISI 304/316/304L/316L/321
 
GB897/898/899
 M12~M160
 6.8~10.9
 
JB4707
 M12~M160
 6.8~10.9
 
HG20634/20613
 M12~M160
 6.8~10.9
 
HG/T21573
 M12~M160
 6.8~10.9
 
SH3404-96
 M12~M160
 6.8~10.9
 
ANSI/ASME B18.2.1
 1/2”~4”
 SAE Gr. 5/8
 
IFI-136
 1/2”~4”
 SAE Gr. 5/8
 
DIN975/976
 M12~M160
 6.8~10.9
 
DIN2510
 M12~M160
 6.8~10.9
 
BS 1769
 1/2”~4”
 6.8~10.9
 
Hex Bolt
 GB5780~GB5783
 M12~M100
 6.8~10.9
 
GB/T1228/1231
 M12~M100
 10.9 S
 
GB/T3632
 M12~M100
 10.9 S
 
HG20634/20613
 M12~M100
 6.8~10.9
 
SH3404-96
 M12~M100
 6.8~10.9
 
ANSI/ASME B18.2.1
 1/2”~4”
 SAE Gr. 5/8
 
ASTM A325/A490
 1/2”~4”
 8.8~10.9
 
DIN 931/933
 M12~M100
 6.8~10.9
 
DIN6914
 M12~M100
 10.9 S
 
ISO4014/4017
 M12~M100
 6.8~10.9
 
JIS1180
 M12~M100
 6.8~10.9
 
Hex Nut
 GB41/6170/6175
 M12~M160
 6~10
 
GB/T1229
 M12~M160
 10H
 
HG20634/20613
 M12~M160
 8, 10
 
SH3404-96
 M12~M160
 6~10
 
ANSI/ASME B18.2.2
 1/2”~4”
 SAE Gr. 5/8
 
ASTM A325/A490
 1/2”~4”
 8~10
 
DIN 934/2510
 M12~M160
 6~10
 
DIN6915
 M12~M160
 10H
 
ISO 4032
 M12~M160
 6~10
 
JIS1181
 M12~M160
 6~10
 

Organization

ERP System

Advanced imported testing equipments are used for strict inspection of raw materials,semi-finished and finished products to ensure that each batch meets the quality standard

Furnace batch number tracking is implemented during the whole production process

Product testing data ia put into ERP system,employes self-inspection during the production process and inspector re-inspection are implemented

Inspector re-inspection is needed besides the initial inspection when production starts,mode updates or material changes;"cup"testing method is applied

During the production process,produts can go to the next procedure only after the confirmation and stamp by corresponding inspectors

All the data during product testing will be put into ERP system
 

 Equipment:

 Major manufacturing equipments consist of Z47-24 multi-station auto cold forger, double-strike cold forger, intermediate frequency induction furnace, stress machine, stamp, specific cutting machine, thread rolling machine, tapping machine, mesh belt heater, middle or high temperature salt immerse furnace, saltpeter tempering furnace, blacken, phosphoration and saponification. The credible inspection instruments consist of steel chemical elements analyzer, metallurgical microscope, steel type analyzer, bolts non-destructive inspection instruments, magnetic particle inspection machine, tension inspection machine, impact testing machine, axis force tester, and sclerometer etc..

Tower Bolts

• A325-A354-A449-A490 Bolts, Nuts & Washers
• A394 Tower & Step Bolts

 1. Surface treatment: Nuture, black, pot galvanizing, cold galvanizing, oil, parkerising etc.

2. Grade: 4.6, 5.6, 8.8, 10.8 and12.9

3. Dia: from M16 to M60

4. Length: unrestricted

5. Standards for railway products: T B, UIC , AREA, etc. standard components:GB,DIN,ASTM.BS,etc

6. Package: according to customer's requirement