As you well aware due to globalization all works has been
very competitive and it is helping us to exchange of knowledge and standards,
in this scenario Chinese works are having more impact and competition throughout
the world. Now it is very essential to know the Chinese standards and how it is
indicated in drawings. Let us discuss how to identify and compare with our
standards.
All Chinese standards are having prefix GB like IS for
Indian Standard, JIS for Japanese. For Construction related works and other
works different Chinese standards are followed, which are listed below.
GB = GuojiaBiaozhun ( National Standard in Chinese)
SY = Shi You (Petroleum)
JB = JianBiao (Construction Standard)
GB/T = T : Tuijian (recommended GB)
HG = HuaGong
(PetroChemical)
Chinese standards for General structural steel (including
chequred steel) is GB/T 700-2006. Grade of materials available is Q235
(A/B/C/D); Q275 (A/B/C/D).
Generally Chinese Steel Grades are Q195, Q215, Q235, Q255
and Q275 is used for Structural works. steel grades by the yield point of the
letter on behalf of (Q) and yield point value is mentioned and sub grade A, B,
C & D are used for further classification. For Example Q235A means, it is a
carbon steel and having maximum yield strength of 235 Mpa.
For Steel section Channel is mentioned as "C";
Angles are mentioned as "L" and Beams are mentioned as “I “or “H
" followed by number. To find out the size of section is number multiple
by 10 is the size of member.
For Example C16 means Channel 160 mm depth. Similarly H10
means H section 100 mm depth.
If the same size but width or flange size is different
then suffix a, b, c is shown. For example C20a & C20b, Both are 200 Channel
however flange is 73 and 75 mm respectively. C20a means Channel 200 X 73 and
C20b means Channel 200 X 75.
For More Details about European Steel Section
Click Here
For More Details about Classification of Indian
Steel Click Here
For More Details about Indian Standard for
Rolled Steel Click Here
