A. Don't mistake the name of alloy plate
Alloy steel plate
Alloy steel plate is alloy steel material, steel in addition to iron, carbon, add other elements. With the development of science and technology and industry, carbon steel can not fully meet the requirements, so there are alloy steel plate, such as bridge plate, container plate, ship plate, wear plate and so on. Alloy steel is often used in the production of ships, vehicles containers, blast furnace tanks, and is widely used in Bridges, construction, machinery, pressure vessels and other manufacturing industries.
Carbon steel
Carbon steel is an iron carbon alloy with carbon content ranging from 0.0218% to 2.11%. Also called carbon steel. Generally also contains a small amount of silicon, manganese, sulfur, phosphorus. The higher the carbon content in the general carbon steel, the greater the hardness, the higher the strength, but the lower the plasticity. The carbon steel plate refers to carbon steel with carbon content below 0.8%, including high carbon steel, medium carbon steel and low carbon steel. Compared with carbon structural steel, the steel contains less sulfur, phosphorus and non-metallic inclusions, and has better mechanical properties. It is used in construction, Bridges, railways, vehicles, ships and all kinds of machinery manufacturing, as well as modern petrochemical industry, Marine development and other aspects.
Alloy aluminum plate
Alloy aluminum plate is in the process of aluminum plate processing to add a variety of alloy elements (the main alloy elements are copper, silicon, magnesium, zinc, manganese, minor alloy elements are nickel, iron, titanium, chromium, lithium, etc.), in order to improve the mechanical properties and chemical indicators of aluminum plate. Alloy aluminum plate has some special properties that pure aluminum plate does not have, and is widely used in special environments, such as ships, refrigerators, molds, aerospace equipment and so on. Aluminum plate can be divided into 8 series and also contains cold rolling and hot rolling process. Common specifications and models are: pure aluminum 1060 plate, 3003 plate, 3003 alloy plate, 3004 mixed vegetables, 3004 alloy plate, 5052 plate, 6061 plate.
Carbon steel plate, alloy steel plate, alloy aluminum plate have different advantages and disadvantages.
B.Description of alloy plate composition
mark | C | Si | Mn | P | S | V | Nb | Al | Ti |
Q345A | ≤0.20 | ≤0.55 | 1.00-1.60 | ≤0.045 | ≤0.045 | 0.02-0.15 | 0.015-0.060 | 0.02-0.20 | |
Q345B | ≤0.20 | ≤0.55 | 1.00-1.60 | ≤0.040 | ≤0.040 | 0.02-0.15 | 0.015-0.060 | 0.02-0.20 | |
Q345C | ≤0.20 | ≤0.55 | 1.00-1.60 | ≤0.035 | ≤0.035 | 0.02-0.15 | 0.015-0.060 | ≥0.015 | 0.02-0.20 |
Q345D | ≤0.18 | ≤0.55 | 1.00-1.60 | ≤0.030 | ≤0.030 | 0.02-0.15 | 0.015-0.060 | ≥0.015 | 0.02-0.20 |
C. General technical requirements for acceptance of steel plates
Each batch of steel plate delivered must have a quality assurance document, the type of inspection document should be in accordance with ASTM A6M and other provisions, clear handwriting without alteration marks.
Deviation of size, thickness and length of steel plate within allowable deviation
Also pay attention to plate surface flatness, plate waviness, appearance and corrosion grade
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