Customized Large Heavy Duty Rolling Mill Housing

We supply big steel casting parts for rolling mill from 3 tons to 150 tons.

The bigger the better.

Mill housing,mill stand,roll chock and column are our common product.

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

We will check the simulation and adjust the technology if necessary.

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

It will cost us around one week.

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

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

If the structure is complicated or the casting weight is big,

the sand mold making will always continue around 7-10 days.

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;

The cooling time will be 96 hours or 120 hours.

5)Clean the sand and cut the riser after normalzing by hot cutting.

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.

7)dimension check and draw a line for machining.

We should check the tolerance before machining,CT13 according to ISO 8062

8)Rough machining

9)NDT withe qualified inspector

10)Welding repair if needed and tempering for stress relief

11)Final machining and NDT

12)Customers' inspection and packing

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.

Our main products are for cement mill(around 30%).

We supply around 400pcs kiln tyres,170 sets of ring gears and 930pcs supporting rollers a year.

We also have rich experience of the castings for shipbuilding with 9 class certificate.

We supply the castings for rolling mill for some Chinese big companies.

Castings for rolling mill occupies 10% of our production ability.

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.

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