CCS BV ABS EH36 Hot Rolled High-Strength Shipbuilding Steel Plate Impact Force At -40 °C With Anti-Rust Painting
Materials
Shipbuilding steel material in carbon and alloy steel, compatible with high strength, low temperature and high heat input soldering.
Shipbuiding Standards from Different Countries
Shipbuilding steel plates are produced under the approval of production methods of classification societies in different countries refers to offshore and marine steels.
- ABS (American Bureau of Shipping)
- BV (Bureau Veritas)
- CCS (China Classification Society)
- DNV (Det Norske Veritas)
- GL (Germanischer Lloyd)
- HR (Hellenic Register of Shipping)
- KR (Korean Register of Shipping)
- LR (Lloyd's Register of Shipping)
- NK (Nippon Kaiji Kyokai)
- RINA (Registro Italiano Navale)
- RS (India Register of Shipping)
Grades: A, B, D, E, AH32/36/40, DH32/36/40, EH32/36/40
According to its yield strength, shipbuilding plate of can be divided into below grades:
- Grade A steel is the impact force subjected to normal temperature (20 ° C).
- Grade B steel impact force at 0 °C.
- Grade D steel impact force at -20 °C.
- Grade E steel impact force at -40 °C.
- High-strength shipbuilding steel plate can be further divided into: AH32, DH32, EH32; AH36, DH36, EH36 and AH40, DH40, EH40.
1. The general grades A, B, D, and E are distinguished according to the impact temperature of the steel. The impact values of all grades of steel are the same.
2. High-intensity hull structure steel preheating requirements: For all AH, DH, EH plate thickness greater than 30mm angle, butt joints, shall be preheating to 120 ~ 150 °C before welding.
3. For thickness of the plate ≤ 30mm, the ambient temperature is below 5 ° C, preheated to 75 ° C; Ambient temperature below 0 ° C, preheated to 75 ~ 100 ° C.
Dimensions Range
Thickness Range: 5 mm -150 mm
Width Range: 1500 mm - 3900 mm
Length Range: 6 m, 12 m, coils
Surface Treatment
With anti-rust painting.
Chemical and Mechanical Requirements
C (carbon) is an indispensable strengthening element in steel, but the increase in C content reduces the low-temperature impact toughness of steel and deteriorates the weldability of steel. Therefore, it is necessary to control the C content in the steel.
According to the experience of producing aluminsum-containing steel, in order to ensure the aluminum content in the steel and the fluidity of the molten steel, the method of pre-deoxidation is strictly to control the carbon content of the end point and the alloying of the large-pack alloy to control the oxidation of the molten steel. The way of adding aluminum.
In order to ensure good low temperature impact toughness of the steel grade, the rolling of the 355MPa class ship plate adopts a strict type II controlled rolling process.
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Average impact absorption
workAkv/J
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Processing for Different Grades
Grade A and B
The general strength of grade A and B shipbuilding steel plates can meet the requirements of process and mechanical properties through ordinary rolling, so the production process is relatively simple.
Grade D, E (DH32, DH36, EH 32, EH 36)
Grade D and E series (inlcuding AH32/36, DH32, DH36, EH32, EH36) shipbuilding steel plates require good low temperature toughness and good welding performance. The production high-strength shipbuilding steel plate needs to be normalized by means of controlled rolling and controlled cooling or heat treatment processes with more complete equipment. At the same time, the internal steel purity of the supplied billets is required to be high, especially the content of S, P, N, 0 and H in the steel should be strictly controlled.
Alloy Elements Added to Improve Toughness
In order to ensure the performance of high-strength ship plates, micro-alloying technology is adopted. By adding Nb, V, Ti and other alloying elements to the steel, combined with the controlled rolling process, the grain is refined and the toughness is improved.
Direction of Development for Shipbuilding Plate
High strength, high specification, with the ship's large-scale and ety, and changes in coating specifications, the demand for ordinary A-class panels is gradually reduced, and the demand for high-strength panels is increasing, which is concentrated in large ships of 5m wide. Plate, 200-300mm thickness special thick ship board.
Q1: What's your terms of payment?
A: 30%T/T as the upfront deposit, 70% before delivery, We will show you the photos and package before you pay the balance.
Q2: What's the terms of delivery?
A: EXW, FOB, CFR, CIF
Q3: What's the terms of packing?
A: Generally,we pack our goods in bundles or coils with rods or belts, we could also pack the goods as the customers' requirement.
Q4: What's your delivery time?
A: For stocks, we could transport the goods to loading port within 7 work days after we received the deposit.For productionperiod,it usually takes about 15 days to 30 days after we received the deposit.
Q5: Could you produce according to the samples?
A: Yes, we can customer-made by your samples or technique drawings, we can build the mold and fixtures.
Q6: Could you provide the compliment samples?
A: Yes, we could provide the free samples on condition that it is available in stocks, however,the transportation fee is borne by buyer.
Q7: How could you guarantee your products quality?
A: Each piece of products is manufactured by certified workshops, inspected by us piece by piece according to national QA/QC standard. We also could issue the warranty to customer to guarantee the quality.
Q8:What are the advantages of your company?
A:(1): Prime quality and reasonable price.
(2): Wide excellent experiences with after-sale service.
(3): Every process will be checked by responsible QC which insures every product's quality.
(4): Professional packing teams which keep every packing safely.
(5): Trial order can be done in one week.
(6): Samples can be provided as your requirements.
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