Steel Pipes,Bars, Shaped


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
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


Hot Rolled ( Forged ) Steel Round Bar
Smooth Turned Round Bar


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 +40mm -0mm
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