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SCW42 bell mouth for shipbuilding

Material:SCW420,SC480 or according to related rules
Application: Shipbuilding
Weight: 3 to 150 tons
Status:pre-machined
Class certificate:ABS,CCS,NK,LR,DNV,RINA,BV,KR
Payment terms:T/T or L/C
Availability:
Quantity:

Material

Chemical composition
C
SiMnSPResidual Element
NiCrCuMo
less 0.23less0.60less1.60less 0.04Total less 0.80


Tensile Strength

σb

Yield Stress

σs

Elongation

δ

Specimen

Reduction of Area

Ψ

N/mm2

%

%

≥415

≥205

≥24

≥35


Prodution process

No.
Equipment Name
Quantity(Set)
1 Transformer substation 1
2 Full set of wooden molding equipment 10
3 Sodium silicate sand mix line 4
4 Alkaline phenol resin sand mix line 2
5 25 tons Electric arc furnace 1
6 50 tons Intermediate frequency furnace 2
7 120 tons Refining furnace 1
8 120 tons VD furnace 2
9 12m*9m*6m Heat treatment furnace 3
10 120 tons Large-scale shot blasting machine 1
11 150 tons Travelling crane 2
12 125 tons Travelling crane 3
13 200 tons Travelling crane 2
14 CNC gantry boring and milling machine 2
15 2.5m-10m Digital vertical lathe 16
16 Boring and milling machine 13
17 Horizontal lathe 3
18 Large dust removal equipment 7

1)The engineer will firstly prepare the technology and do a simulation before pouring.

1642741044(1)


2)We will make a pattern of the kiln tyre based on engineer's technology.

It will cost us around one week.

After that the engineer will check the dimension and make a record.

P11-1

3)Sand molding making will be made by experienced wokrers.

IMG_20180619_091321

4)Pouring and cooling.

There are one 8tons electrical arc furnace;

Two 50 tons medium frequency furnace;

One 120 tons refining furnace and one 120 tons VD furnace;

5)Clean the sand and cut the riser before heat treatment

6)Heat treatment will cost 7days( 4 days normalizing and 3 days tempring).

There are 8 heat treatment furances with max. one is 12m*9m*6m.

热处理炉

7)dimension check and draw a line for machining.

IMG_2136

8)Rough machining

IMG_20180712_074019

9)NDT withe qualified inspector

磁粉照

10)Welding repair if needed and tempering for stress relief

11)Final machining and NDT

12)Customers' inspection and packing

8-1

2



About Haitai

P5

Haian Haitai Casting Co.,Ltd. is established in 2003. 

We supply large steel castings with low carbon or alloy steel from 3 tons to 150 tons per piece.

With a quick development,now we had supplied steel castings 6,000 tons per month.

There are three workshop for sand mold making,one workshop for machining and one for post procedure.

We have 9 class certificate:ABS,RINA,DNV,LR,KR,BV,CCS,NK and have cooperation with most of Chinese famous shipyards and some foreign shipyards.



Testing Equipment

No.
Equipment Name Quantity(Set)
1 Sand analysis equipment 1
2 Impact sample low temperature meter 1
3 Direct reading spectrometer(OXFORD) 2
4 ONH analyzer 1
5 ZEISS metallurgical microscope 1
6 Pendulum impact tester 1
7 Microcomputer controlled electro-hydraulic servo universal test machine 5
8 Various hardness tester 4
9 Magnetic defect detector 5
10 Ultrasonic flaw detector(digital) 1
11 CX-52 Total station 1
12 Stylus roughness meter 1


We do the test according to diffrent production step,

such as chemical composition,UT,MT and mechanical property.

In 2021,Haitai inspection and testing center got approval from CNAS.


P6-3

P10-1

P10-3

Delivery

Our company is near to Shanghai port and we can supply different packing according to customers' specification.

110026


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