* Specifications
- Carbon Steel for Machine Structural Use
  AISI 1010, 1015, 1018, 1020 1022 1025 1045 1050
  JIS G 4051 S10C, S15C, S20C,S22C, S25C, S45C,S50C
  BS 970 Part 1/3, 040A10, 070M20/C22, C25, C45, C50
  Australia/N.Z. AS3679 250/300
- Chromium Molybdenum Steels
  AISI 4131, 4135, 4140,ASTM A 193 B7(*)
  JIS G 4105 SCM 415, SCM435, SCM440                                                  for more,
  BS 708M20, 34CrMo4, 708M40
- Spring Steels
AISI 9260/5155/6150/9254
JIS G 4801 SUP7/9/10/12, BS 735A51, 685A57, DIN 55Cr3, 50CrV4, 54SiCr6
for more,
* Characteristics
Hot Rolled ( Forged ) Steel Round Bar
Smooth Turned Round Bar
* Dimensions
Dia.(mm) Length(M) Dia Tolerance Straightness Shape
12-530 3.0-8.0 1.5% of dia. 3/1,000 Round, Hexagon,
Square & Flat

* Tolerances of Hot Rolled Round Bar and Square Bar
Item Dimensional Tolerance
Tolerances on diameter or width across flats 1.5% with the minimum value of 0.4mm
Deviation of diameteror deviation Not exceeding 70% of range of tolerance on diameter
or width across flats
Tolerances on length For length not
exceeding 7m
For length exceeding7m Add 5mm to plus side tolerance for
every increase of 1m or its fraction
Radius on corners(R) 10 to 20% of width across flats, as a rule
Twist To be practically straight
Bend Not exceeding 3mm for every 1m and not exceeding
3mm X length(m)/1m for total length

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