Tel : 0086-021-60880117
Tel : 0086-021-60880117
SWCH20A carbon steel wire rods is Aluminum killed steel . SWCH20A is in the Japanese Industrial Standard JIS G3507 Part 2 : Wires .
Standard : JIS G3507
Grade : SWCH20A
Brand : Royal
Size of wire diameter : 5.5-34mm
SWCH20A 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 SWCH20A 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 .
SWCH20A steel wire rods for screws mechanical properties :
|
Grade |
process methods |
Division of wire diameter/mm |
Tensile strength MPa |
Reduction of area % |
(Informative)Hardness HRB |
|
SWCH20A |
process D |
≤3 |
≥690 |
- |
- |
|
3~4 |
≥590 |
≥45 |
|||
|
4~5 |
≥490 |
||||
|
＞5 |
≥410 |
≤92 |
|||
|
process DA |
- |
≥370 |
≥55 |
≤85 |
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 .
SWCH20A cold heading steel wire rods application:
SWCH20A 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 .
Related Link:JIS G3508-2:SWRCHB323,SWCH6A,SWCH8A,SWCH10A,SWCH12A,SWCH15A,SWCH16A,SWCH18A,SWCH19A,SWCH22A