Year1
- Q345R：
- 630 10500
- Q345R：
- 950 2480
R is a large type of container plate among steel plates
Grade representation method:
R
.
For example:
R.
&Qu&The first letter of Chinese Pinyin.
Yield strength value.
R: &Rong& the first letter of Chinese Pinyin.
According to the new classification of "
B
-
Steel Plate for Boilers and Pressure Vessels" implemented on
,
/> and
R,
are merged into
R.
R is ordinary low alloy steel
. It is a commonly used steel for boiler and pressure vessels. The delivery status is: hot rolled or normalized. It is a low alloy steel. The properties are similar to those of
() (the yield strength of the steel plate is greater than
), the tensile strength is between (
), and the elongation is greater than
%. The zero-degree
impact energy is greater than
.
R process reference standard
.
R steel plate is a special plate for pressure vessels with yield strength
. It has good comprehensive mechanical properties and process performance. The phosphorus and sulfur content is slightly lower than that of low-alloy high-strength steel plate
steel. In addition to the tensile strength and elongation requirements being higher than those of
steel, impact toughness is also required to be ensured. It is currently the most widely used and most widely used steel plate for pressure vessels in my country.
1. The operating conditions of the equipment (such as design pressure, design temperature, characteristics of the medium), material welding performance, hot and cold processing performance, heat treatment and container structure must be considered.
2. On the premise of satisfying the first article, consider economic rationality:
When the thickness of the required steel plate is less than
, between carbon steel and low alloy high-strength steel, it should be as much as possible Use carbon steel plates (except for multi-layer containers).
In situations where stiffness or structural design is the main focus, ordinary carbon steel should be used as much as possible. In situations where strength design is the main focus, steel plates such as
B,
R(),
R(R) should be selected in order according to usage restrictions such as pressure, temperature, medium, etc.
When the required thickness of stainless steel is greater than
, structural forms such as lining, composite, and overlay welding should be used.
Stainless steel should not be used as heat-resistant steel with a design temperature less than or equal to
degrees Celsius.
, Pearlitic heat-resistant steel should try not to be used as heat-resistant steel with a design temperature less than or equal to
degrees Celsius. When pearlitic heat-resistant steel must be used for heat-resistant steel or hydrogen-resistant purposes, the types and specifications of steel should be reduced and combined as much as possible.
3. For
steel plates with a thickness greater than
, the upper limit of carbon content can be increased to
.%.
4.
Niobium, vanadium and titanium elements can be added to the R steel plate. Their content should be filled in the quality certificate. The sum of the above
elements should not be greater than
respectively. %,
.%,
.%.
.
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