Chemical composition of different kinds material wire
Material quality Specification Chemical composition% Oxidize method
C Mn Si S P
?
Q195 ------ 0.06-0.12 0.25-0.50 0.30 0.050 0.045 F.b.Z
Q215 A 0.09-0.15 0.25-0.55 0.30 0.050 0.045 F.b.Z
B 0.045
Q235 A 0.14-0.22 0.30-0.65 0.30 0.050 0.045 F.b.Z
B 0.12-0.22 0.30-0.70 0.045
A ?0.18 0.35-0.80 0.040 0.040 Z
B ?0.17 0.035 0.035 TZ
Q255 A 0.18-0.28 0.40-0.7 0.30 0.050 0.045 F.b.Z
B 0.045
Q275 ------- 0.28-0.38 0.5-0.8 0.35 0.050 0.045 b.Z

Black Iron Wire
Aocheng produces good quality black iron wire for customers from BWG 6 to BWG22.
Black Annealed wire, also called black wire or annealed wire, also mostly written as Annealed Steel Wire, soft annealed wire, annealed iron wire or just annealed wire, . This kind of steel wire offers excellent flexibility and softness due to its oxygen free annealing process. comes in the form of coil wire or cut wire.
The most common package is 5kg/coil, 10kg/coil, 25kg/coil and 50kg/coil.
Mostly used in construction or daily use as binding material, tie wire or material for weaving wire mesh.