Medium carbon steel wire rods
In medium carbon steel wire rods, the weight percent of carbon is in the range of 0.2% to 0.4%. Also they are classified as medium strength steels, which have desired cold formability. Medium carbon steels are source materials for production of bolts, concrete reinforcement bars, etc. these types of wire rods are also used in cold drawing process. Ribbed wire rod for concrete reinforcement according to INSO 3132 (AIII) is one of the products of this group of steel. SAE 1022 with appropriate capability of cold heading process, is utilized for production of medium strength bolts. Chemical and mechanical properties of these grades are indicated as follows.
Products Specification:
Grade
ST 3sp
Standard
GOST 380
Type of product
wire rod
Microstructure
ferrite+pearlite
Production process
Hot rolling
Mechanical properties:
Tensile test standard
ISO 6892-1
Tensile strength(MPa)
430-510
Yield strength(MPa)
300-320
Reduction of area R.A(%)
65-70
Elongattion
40-45
Chemical Analysis:
Alloy
Min.
Max.
C
0.14
0.22
Si
0.15
0.3
Mn
0.4
0.7
P
-
0.02
S
-
0.02
Cr
-
0.1
Mo
-
0.01
Ni
-
0.1
Cu
-
0.1
Al
-
0.005
Available sizes(mm)
5.5,6.5,8,10,12,14
Max. of ovality
0.2mm