Let me see your bookshelf Q690R is a high-strength pressure vessel steel that is mainly used in pressure vessels and other structural applications. The following is a comprehensive explanation of Q690R steel plate:
Q690R steel plate production process:
1.Steelmaking: Initial refining using a converter or electric furnace, then refining by LF furnace and vacuum degassing by VD furnace.
2.Continuous Casting Die Casting: The refined molten steel is injected into the continuous casting machine or die casting mold for molding.
3.Cleaning and heating: The symmetrical steel plate is surface cleaned and heated to relieve stress and improve rolling performance.
4.Rolling: The heated steel plate is rolled to obtain the desired thickness and size.
5.Flaw detection: Non-destructive testing is performed on the rolled steel plate to ensure its internal quality.
6.Heat treatment: According to the need, the steel plate is heat treated to improve its mechanical properties and corrosion resistance.
7.Surface inspection: A surface inspection is carried out on the heat-treated steel plate to ensure its surface quality.
8.Batching: According to the quality requirements and use, the steel plate is divided into different batches.
9.Cutting and sampling: According to the requirements of the drawings, the steel plate is cut and sampled for inspection.
10.Performance test: The performance test of the sample after cutting and sampling, including mechanical properties, chemical composition and metallographic structure, etc.
11.Steel plate finishing: surface finishing and coating treatment of qualified steel plates to meet customer requirements.
Q690R steel plate composition and performance:
The main elements of Q690R steel plate: including carbon (C), silicon (Si), manganese (Mn), phosphorus (P), sulfur (S), chromium (Cr), nickel (Ni), etc. The content and proportion of these elements directly affect the strength, toughness, corrosion resistance, etc. of the steel plate.
Q690R steel plate mechanical properties: Q690R steel plate has excellent mechanical properties such as high strength, high toughness, fatigue resistance, impact resistance, etc. Its tensile strength can reach more than 690MPa, the yield strength is about 580MPa, and the elongation is more than 16%.
Q690R Steel Plate Corrosion Resistance: Q690R also has good corrosion resistance, which makes it maintain good performance in marine environments and other harsh environments.
Q690R steel plate application field:
Q690R steel plate is mainly used in pressure vessels, spherical tanks, petrochemical equipment, heat exchangers and so on.
Delivery status and processing:
Quenching and tempering condition: Q690R is usually delivered in quenching and tempering condition, and the tempering temperature is not less than 600.
Processing difficulty: Due to its relatively high material cost and processing difficulty, reasonable design and processing control are required in practical applications to ensure its performance and reliability.
Q690R steel plate precautions:
Cost considerations: Q690R material has a high cost, so its performance and economy need to be considered comprehensively when choosing to use.
Application limitations: Despite the many advantages of the Q690R, there may be other factors to consider, such as temperature and environment, in some specific application scenarios.
In a word, Q690R is a high-strength, high-toughness, corrosion-resistant pressure vessel steel, which is widely used in bridge engineering, marine engineering and other fields. In practical applications, factors such as performance, cost, and application environment need to be comprehensively considered.
Q690R steel plate warehouse size and cutting, fixed rolling and deep processing services.
General specification thickness: 8mm-150mm, width: 1600mm-3900mm, length: 6000mm-14000mm. It can also be rolled according to requirements, and can also be cut according to the drawings according to the requirements.