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Tel : 0086-0371-86172891
SWCH25K carbon steel wire rods for cold heading
SWCH25K carbon steel wire rods is killed steel . SWCH25K is in the Japanese Industrial Standard JIS G3507 Part 2 : Wires .
Standard : JIS G3507
Grade : SWCH25K
Size of wire diameter : 5.5-34mm
SWCH25K annealing steel wire rods process methods :
(1)Process D : The Process D means a process wherein wire rods are finished by cold working .
(1)Process DA : The Process D means a process wherein wire having been cold worked are annealed and further finished by cold working or a process wherein wire rods are finished by cold working after annealing .
The steel wire rods SWCH25K shall be manufactures by process D or DA . However ,manufacturing processes other than given above may be selected by agreement between the purchaser and the supplier .
SWCH25K steel wire rods for screws mechanical properties :
|
Grade |
process methods |
Division of wire diameter/mm |
Tensile strength MPa |
Reduction of area % |
(Informative)Hardness HRB |
|
SWCH25K |
process D |
3~4 |
≥690 |
≥45 |
- |
|
4~5 |
≥570 |
||||
|
＞5 |
≥470 |
≤98 |
|||
|
process DA |
- |
≥440 |
≥55 SWCH25K carbon steel wire rods is Aluminum killed steel .SWCH25K steel wire rods for cold heading is used for the manufacture of various types of screws such as bolts,nuts,rivets,machine screws and tapping screws and various parts by cold heading . |
≤88 |
Remarks:
For wires of 20mm or over in wire diameter,the reduction of area shall be value 5 lower than the value in table 2 .For those of diameter 3mm or less,the reduction of area is not specified .
SWCH25K cold heading steel wire rods application:
SWCH25K steel wire rods for cold heading is used for the manufacture of various types of screws such as bolts,nuts,rivets,machine screws and tapping screws and various parts by cold heading .
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