Hull Structural Steel plate

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Introduction

Shipbuilding steel generally refers to the steel for hull structure, it refers toaccording to the classification to build production specifications for the manufacture of hull structure steel. Often as a special steel orders, scheduling,sales, a ship comprises a ship plate, steel etc..

2 specification

Currently has several large iron and steel enterprises in China the production,but also can according to user needs production of different national standardof ship steel, such as the United States, Norway, Japan, Germany, France,etc..

Varieties and specifications

In hull structural steel according to the minimum yield point strength: Division ofgeneral strength of structural steel and high strength structure steel.

The general strength of structural steel China Classification Society standardsare divided into: A, B, D, E four grades; high strength structural steel China Classification Society standards into three grades, four grades.

Acceptance notice of delivery of ship steel

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1, certificate of quality review:

Mill delivery must according to the requirements of users according to the standard stipulated in the contract delivery and provide the original certificate of quality. The certificate, must have the following contents:

(1) specification requirements; (2) quality record number and certificatenumber; (3) technical grade batch number,; (4) the chemical composition and mechanical properties; (5) the approval of the classification society certificate and surveyor signature.

2, physical examination:

Ship steel delivery, physical objects should have the production factory mark.There are specific:

(1) classification society recognized signs; (2) using the paint box or marking,including technical parameters such as furnace batch number, standardgrade, the length and width dimensions; (3) the appearance of smoothsmooth, defect free.


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Q:What's the difference between a spray plate and a colored steel plate?
Color steel plate, material without zinc flower leveling, hot galvanized steel coil and zinc alloy coating, steel coil and other good substrate;
Q:What is the aging property of steel plates?
Timeliness refers to the change in performance with time.
Q:How thick is steel filing cabinet usually made of steel plates?
A lot of people will hold 0.6 of the said 0.8 material, this is because the cold rolled plate after forming electrostatic spraying powder and environmental protection, so it is actually only 0.6mm 0.8mm bare steel, on this point, if you are purchasing large quantities of words, can use vernier caliper to card
Q:What is muotileaved spring? What is the little leaf spring?
Leaves: by the middle thick and thin steel sheet at both ends of the superposition of equal width. The plate section changes little leaf spring, from the middle to both ends of the cross section is gradually different, therefore the rolling process is more complex, the price is expensive than multi leaf spring. Compared with less leaf spring leaf spring, in the same stiffness (i.e. the same carrying capacity) under the condition of less than the spring leaf light is approximately 50%, reducing fuel consumption, increased ride comfort. And between the little leaf spring monolithic contact, reduces the relative friction and vibration, the ride comfort is increased.
Q:The differences and uses of cold rolling and hot rolling
Cold rolled forming steel allows partial buckling of the cross section, thus taking full advantage of the post buckling capacity of the member, while the hot-rolled section does not allow partial buckling of the cross section.
Q:What is Larson steel sheet pile?"
Use Larson steel sheet pile is very extensive, in the permanent structure, can be used for wharf, unloading field, Levee Revetment, retaining wall, retaining wall, breakwater, embankment, dock gate, etc.; in temporary structures, can be used for temporary expansion of bank, flow, large pipeline laying temporary cofferdam, bridge trench excavation retaining, retaining water, sand and so on; in the flood, and can be used for flood control, anti collapse, anti sand etc..
Q:Bathroom washing machine, galvanized steel and color steel which good?
Infiltration of zinc is the function of zinc atoms to the steel parts, the steel plate has undergone a qualitative change, even if it does not scratch Yi Shengxiu
Q:What is the difference between the zinc plated color guide and the profiled steel sheet?
Profiled steel sheet Yaxing, GangBan, English Name: profiled steel sheetRoof and wall panels are usually 0.4 to 1.6 millimeters thick and used for load-bearing slabs or silos with a thickness of 2~3 millimeters or more. The wave height generally ranges from 10~200 mm. When not reinforced, the ratio of height to thickness should be controlled within 200. When the long roof panel, the slope can be used from 2 to 5%, while the deflection is less than l/300 (L for the calculation of span length). At present, part of the waveform used in the construction is shown in Figure II, commonly used for profiled steel sheets.Because the original plate is very thin, the quality of the anticorrosive coating directly affects the service life of the profiled steel sheet. In order to meet the requirements of processing and rust prevention, the coated steel plate shall be examined in accordance with the relevant provisions. Under normal circumstances, thin steel plate can also be used according to the requirements, after pressing type, and then coated with anti rust paint, or use stainless steel sheet, the original plate.
Q:What is the difference between cold rolling and hot rolling?
Hot rolled steel coil as raw material by pickling descaling after cold rolling, the finished rolling hard volumes, due to continuous deformation caused by cold hardening the hard roll strength and hardness of the rise and decline of toughness index, stamping performance deterioration, only for a simple deformation of parts. Rolled hard rolls can be used as raw material for hot galvanizing plants, because the hot galvanizing units are equipped with annealing lines. The roll weight is usually 6~13.5 tons, and the inside diameter of the steel coil is 610mm. Generally, cold continuous rolling plate and roll should be annealed by continuous annealing (CAPL unit) or bell type furnace to eliminate cold work hardening and rolling stress, and meet the standard mechanical performance indexes. The surface quality, appearance and size accuracy of cold rolled steel plate are superior to those of hot rolled plate.
Q:How can steel plates with a thickness of 1MM be welded?
The seam is also called the wheel welding equipment for the production, mainly uses fuel exhaust pipe seal. The principle is similar to that of spot welding. The difference is that the output current is uninterrupted.

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