Electrical ductile iron manhole cover EN124 D400

Electrical ductile iron manhole cover EN124 D400 System 1

Electrical ductile iron manhole cover EN124 D400 System 2

Electrical ductile iron manhole cover EN124 D400 System 3

Electrical ductile iron manhole cover EN124 D400 System 4

Electrical ductile iron manhole cover EN124 D400

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Loading Port:: Tianjin

Payment Terms:: TT OR LC

Min Order Qty:: 1 set

Supply Capability:: 4000 set/month

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Specifications

1.Material:Ductile Cast Iron
2.Standard:ISO 9001:2008 EN250
3Coating:bituminous paint
4.Load weight:250KN

Ductile Iron Gully Grating

Feature:

1)Product information

Surface is smooth , free from sand holes, blow holes, distortion or any other defects.

2)Material Ductile Iron GGG500 / Grey Iron GG20.

3) Designs As per customers' drawings or samples.

4)Process Green sand with hand molding.

5) Coating Black Bitumen Coated, Without coating or Coating as per customers' requirement.

6)Packing wooden pallet with plastic layer or according to customers' request

We are an ISO9001:2000 certified enterprise in China, specializing in manufacturing various kinds of of ductile iron grating manhole covers .

Packaging & Shipping

Packaging: Details Pallet with bubble film, Carton or with pallet,

Delivery Detail: 30-45 days

Electrical ductile iron manhole cover EN124 D400

Advantage of ductile iron

Higher quality /higher tensile
Higher security /long life

Possibilities of new locking systems

Our Company

We take pride to introduce ourselves as the leading manufacturer and professional supplier of various Ductile Iron Manhole covers in China with total annual capacity 50,000 MT.

CNBM manhole cover regard quality as the essential factor leading to successful business. After years of efforts, CNBM manhole cover have built up great reputation in terms of quality and service among domestic and overseas customers. Our customer come from America, Morocco , saudi arabia, Iran , Algeria and so on

CNBM Ductile Iron manhole cover A15-F900 complying with EN 124 Standard

Electrical ductile iron manhole cover EN124 D400

FAQ

1. What is your products advantage?

A. All kinds of size as customer's requirements;

B. Small quantity trial order is welcome

C. Customized design is available and free, Such as Color, Logo, Panel, Load and Dimension etc.

D. Quality control and promptly delivery

E. Good after sales service

2. What is your payment?

T/T, L/C, D/P Western Union or as customer's requirements.

3. How about the shipment?

A. Small quantity you can choose by air

B. Less than one container you can choose LCL shipment by sea

C. One container or more than one container you can choose FCL shipment by sea.

Q: What are the factors affecting the machining process of the casting material and structure?: Medium carbon steel begins, and the casting can not be punched and tapped directlyStainless steel, ordinary grade (Fe based alloy element content, less) can not do heat treatment. But processing small holes or tapping to heat treatment (solution. In practice, the annealing treatment can also be). There are a lot of stainless steel matrix is not to say, for example, nickel, cobalt and tungsten. And so on.

Q: Why does the surface of stainless steel casting mirror mirror ripple?: Because the grinding machine is layer by layer. And the material inside the casting is not completely uniform.

Q: What is normalizing, annealing, tempering, quenching? What is the difference between forging parts and casting parts?: According to the requirements of the workpiece annealing, there are many kinds of annealing process specifications, such as full annealing, spheroidizing annealing and stress relieving annealing. Steel the steel quenching is heated to the critical temperature Ac3 (hyposteel) or Ac1 (hypereutectoid steel) above a certain temperature, holding time, so that all or part of 1 Austenitic, then the cooling rate is greater than the critical cooling rate of fast cooling to below Ms (or near Ms isothermal) of martensite the body (or bainite transformation) heat treatment process. Aluminum alloys, copper alloys, titanium alloys, tempered glass and other materials are usually treated by solid solution or heat treatment with rapid cooling process. Tempering is a heat treatment process where the workpiece is hardened and heated to a temperature below AC1, which remains cool for a certain period of time and then cools to room temperature. Tempering generally followed by quenching, the purpose is: (a) to eliminate the residual stress caused by quenching, prevent deformation and cracking; (b) hardness, strength, plasticity and toughness of workpiece is adjusted, to use performance requirements; (c) the size of organization and stability, ensure the accuracy improvement; (D) and to improve the processing performance. Tempering is therefore the last important step in obtaining the desired properties of the workpiece. According to the tempering temperature range, tempering can be divided into low temperature tempering, medium temperature tempering and high temperature tempering. This answer is recommended by the questioner

Q: What are the effects of stiffeners on castings, or on welded parts (for 2 tons or less), casting or weldments on stiffeners?: 4, the performance requirements of the steel: whether castings or welding parts, there may be quality defects, but the casting will generally be worse than the weldment.You should be able to make a choice in the end.

Q: Is the cast steel a casting part?: Yes, molten steel is poured into the mold and cooled to become a casting. Can also cast iron, cast aluminum, plastic casting.

Q: What is the reason for 304 stainless steel precision casting parts to be changed?: 304 stainless steel is easier to change than ordinary steel. Because the 304 heat conductivity is lower than that of the low doped steel, the temperature is even more uneven, and 20% of the non ferrous elements also make the distribution of internal and external elements more uneven, hard and soft inside. Each of these two produces greater internal stresses, resulting in a variant.

Q: What's the density of the cast iron? The density is thin and the density is thin: Uneven casting density is caused by uneven shrinkage of the casting during solidification.

Q: What should I pay attention to when designing a casting structure?: 1 of the casting in metal mold cooling was faster than sand, metal type and let, thus casting in metal mold casting, casting stress generated in the ratio of sand casting to crack tendency is also large, but also prone to misrun and cold lap, white (for casting casting). Defect. Usually: (1) in the prevention of metal casting casting crack aspect should pay attention to the following problems: the structure of A in wall thickness, wall transition and connection to the ease, corner fillet appropriate requirements such as should be more strict than sand casting; B should be connected vertically connected with the wall to tilt C; for the weak parts of the structure should be set to strengthen ribs, bosses, to prevent casting; D should minimize the obstacle free shrinkage of the boss, casting rib, flange and other prominent part; E in the casting arrangement of ribs, but also should consider its influence on the casting shrinkage.

Q: What is the casting material?: Gray iron, carbon steel, low alloy steel, ductile iron, stainless steel, Aluminum Alloy can all be cast out

Q: Which master knows how the casting tolerances for malleable iron, gray iron and ductile iron should be chosen? Hurry up, thank youCan you provide a tolerance scale for castings, please?: Usually manual molding optional CT11 class, ordinary machine modeling optional CT10 class, high pressure molding should reach CT9 level. The tolerances on the wall thickness of the casting are comparable to those of other dimensions of the same casting.

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