Tel : 0086-021-60880117
Tel : 0086-021-60880117
SWRCHB323 Boron steels for cold heading is in the Japanese Industry Standard JIS G3502-2:2005 Part 2:Wires .JIS G 3508 SWRCHB323 specifies the boron steel wire rods to be used mainly for manufacture of the boron steel wires for cold heading.
SWRCHB323 cold heading steel wire manufacture method :
D:D process means to finish wire rods by cold processing .
DA : DA process means after cold processing,wire rods are annealed,and further finished by cold processing.Or after annealing wire rods,they are finished by cold processing .
(1)The steel wire shall be manufactured by either D or DA process .However,upon agreement between the purchaser and the supplier ,the wire may be manufactured by other process than those mentioned above .
(2)The purchaser may specify the type of surface film of the wire .
SWRCHB323 steel wires mechanical properties by D process :
|
Grade |
process methods |
Tensile strength MPa |
Reduction of area % |
(Informative) |
|
SWCH38K |
process D |
≤750 |
≥45 |
≤100 |
|
process DA |
≤610 |
≥55 |
≤97 |
SWRCHB323 cold heading steel wire application :
SWRCHB323 boron steel wires for cold heading is used for manufacture of various typed of screws such as bolts,nuts and machine screws and other parts by cold heading .
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