Year1
- 规格：
- 板棒线卷管齐全
- 硬度：
- 167-200
- 材质单：
- 随货配送
: Ordinary carbon structural steel:
The former contains more impurities, is cheap, and is used in places where performance requirements are not high.
Most of its carbon content is
r
r
,
The manganese content does not exceed
r
, the strength is low, but the plasticity, toughness and cold deformation properties are good. Except for a few cases, it is generally used directly without heat treatment. It is mostly made into bar steel, special-shaped steel products, steel plates, etc. It has many uses and is used in large quantities. It is mainly used in railways, bridges, and various construction projects to manufacture various metal components that bear static loads, as well as unimportant mechanical parts and general welding parts that do not require heat treatment.
High-quality carbon structural steel
High-quality carbon structural steel is pure, has few impurities, and has good mechanical properties. It can be used after heat treatment. According to the manganese content, it is divided into ordinary manganese content
r (
less than
r
r)
and higher manganese content
r(
~
r
r)
Two groups. The carbon content is below
r
. It is mostly used directly without heat treatment, or it is carburized, carbonitrided, etc. to manufacture small and medium-sized gears, shafts, piston pins, etc. The carbon content is below
/> r
~
r
, typical steel numbers are
r
,
r
,
,
etc., often undergo quenching and tempering treatment to manufacture various mechanical parts and fasteners with carbon content exceeding
r
, such as
r
,
r< br/>,
r
,
,
, etc., are mostly used as spring steel.
This type of steel mainly guarantees mechanical properties, so its grade reflects its mechanical properties, which are represented by
r+
numbers, where
r
is the yield point
r
qu
r
is the prefix of the Chinese pinyin of the word qu, and the number indicates the yield point value, for example,
r
indicates that the yield point is
r
. If the letters
r
,
r
,
,
are marked after the grade, it means that the quality level is different, including
r
,
r
decrease successively, and the quality of steel improves successively. If the letters
r
are marked after the grade, it is boiling steel, and it is marked
rb
and it is semi-killed steel, and it is not marked
r
or
rb
The latter is killed steel. For example,
r3-
represents the
r
grade boiling steel with a yield point of
r
, and
r
represents the yield point. It is
r
grade killed steel
Carbon structural steel is generally not heat treated and is used directly as supplied. Usually
r
,
r
,
r
Steel has a low carbon mass fraction, good welding performance, good plasticity and toughness, and a certain strength. It is often rolled into thin plates, steel bars, welded steel pipes, etc., and is used in bridges, buildings and other structures and in the manufacture of ordinary screws, nuts and other parts.
r
and
r
Steel has a slightly higher carbon mass fraction, higher strength, better plasticity and toughness, and can be welded. It is usually rolled into shaped steel, bar steel and Steel plates are used as structural parts and for manufacturing connecting rods, gears, couplings, pins and other parts of simple machinery
r
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