By Kingwen
Liang
Kitchen cabinet
door Hinge, in the spring hinge industry which Kingwen Liang is engaged in,
cold rolled steel Q195 is most used. About the knowledge of the cold rolled
steel, please pay attention to the article below
The classification and use of
the cold rolled steel and the cold rolled coil
Cold-rolled steel
is short for the thin cold-rolled steel which is made from ordinary carbon structural,
commonly known as the cold plate. Cold plate is the steel that made up of
ordinary carbon structural steel hot-rolled steel belt; the thickness is less
than 4mm after further cold rolling. The cold plate has a favorable quality and
high precision in size because it is made in the room temperature and would not
produce scale, plus with the annealing treatment, the mechanical properties and
process performance are better than hot rolled steel, in many fields,
especially in home appliance manufacturing areas, has been gradually replace
the hot rolled steel.
Applicable grades:
Q195 Q215 Q235 Q275 SPCC (Japan brand) ST12 (Germany brand)
Symbol:
1.
Q- The
code for the ordinary carbon structural point (limit), it is the first word of
Chinese phonetic alphabet. 195 215 235 255 275-represent the number the
cold-rolled steel can bear (limit), the unit (MPa ). The Q235 is the best in
the strength, plasticity, toughness of the ordinary carbon structural, it can
meet the demand of daily use, so the application range is very wide.
2.
S-for
steel. P for plate. C for cold-rolled. And the fourth-regular grade C for common.
3.
ST for
Steel and the number 12 stand for the ordinary cold-rolled steel.
Mark: size
precision-dimensions-plate breed standard
Cold-rolled steel: Steel-technical condition
standard
Mark example: B-0.57501500-GB708-88,
Steel, Q/BQB402 Standard, grade (SPCC), annealing heat treatment state plus
level(S), table textured D, with central processing status to surface quality
level for FB trimming steel; the thickness is 0.5mm, B precision of width
1000mm. a level precision ,length is 2000mm, A level precision ,roughness of PF
precision. A, is marked as: steel ECQ/BQB 402-(SPCC)-SD-FB/(A2000A-PF.0.51000A)
Cold-rolled steel:
Q225-GB912-89
The main origin:
Bao steel, steel, Ben steel, Wu steel, Han steel, Bao steel, Tang steel, Lian
steel, Ji steel and so on.
Ordinary
cold-rolled steel: This is made up of ordinary carbon structural or low alloy structural.
It has a good surface quality and a perfect punching property. It requires passing
the cold bending test, which is common used in the automotive industry.
High quality
cold-rolled steel: mainly include all kinds of high quality cold-rolled steel;
the most commonly used is the carbon structural, especially for deep drawing,
which is composed of low carbon cold-rolled steel. According to the surface quality,
divided it into three parts: I II III, respectively the special senior, senior
and high rough surface, according to the drawing, can be divided into ZF, HF
and F, due to the toughness of the steel, can deeply divided into A and B, is
widely used in the automobile tractor industry.
Cold-rolled steel:
with smoothly surface, excellent in processing, commonly used in the automobile
refrigerator washing machine and other home appliance, it is also used in the
industrial equipment and all kinds of building material. With the development
of economy, the cold-rolled steel is called as the material of modern society.
The classification
of cold-rolled product: hot rolled pickling, rolling hard, ordinary
cold-rolled, galvanized (galvanized fingerprint resistant, hot dip galvanized),
zinc, tin plate, coating, electrical steel (silicon steel ) and so on.
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