En42crmo4 Support Roller for Paper Mill

Basic Info

Model NO.	02
Application	Machinery Parts
Machining	Machining Center
Material	Steel
Surface Treatment	Sand Blast
Surface Roughness	Ra6.3
Standard	ASTM
Certification	ISO 9001:2008
Heat Treatment	Normalizing+Tempering+Quenching
Delivery Status	Pre-Machined or Finished Machining
Surface Hardening	400-450hb
Weight	3 to 190 Tons
Certificate	ABS,CCS,BV,Lr,Dnv,Rina,Kr,Nk
Wall Thickness	Min. 50mm
Test Block	230*70*50mm
Packing	Wooden Case
Transport Package	Wooden Case
Specification	12m*9m*6m
Trademark	OEM
Origin	China
HS Code	8414909090
Production Capacity	6, 000 Metric Tons/Month

Packaging & Delivery

Package size per unit product 100.00cm * 100.00cm * 100.00cm Gross weight per unit product 5000.000kg

Product Description

Product Parameters

The material is low carbon or alloy steel,such as ZG270-500,ZG42CrMo,ZG35Mn and so on.

Material:ZG25CrNiMo

Steel Grade	Chemical Composition %
	C	Si	Mn	Cr	Ni	Mo	S	P
ZG25CrNiMo	0.25-0.30	0.20-0.40	0.70-0.90	0.40-0.70	0.40-0.70	0.15-0.25	<=0.025	<=0.025
ZG30CrMo	0.26-0.33	0.17-0.37	0.40-0.70	0.80-1.10	-	0.15-0.25	<=0.025	<=0.025
ZG35CrMo	0.32-0.40	0.17-0.37	0.40-0.70	0.80-1.10	-	0.15-0.25	<=0.025	<=0.025

Standard	Yield Strength Rp0.2 /MPa	Tensile Strength Rb / MPa	Elogation A / %	Reduction of Area Z/ %
60K	≥414	≥586	≥18	≥35
75K	≥517	≥655	≥18	≥35
80K	585-660	≥725	≥18	≥35

Material	C	Si	Mn	P	S
ZG270-500	0.32-0.40	0.20-0.52	0.45-0.90	≤0.035	≤0.035

Material	C	Si	Mn	P	S	Cr	Mo
ZG42CrMo	0.38-0.43	0.15-0.35	0.75-1.00	≤0.035	≤0.035	0.80-1.10	0.15-0.25

Material	C	Si	Mn	P	S
ZG35Mn	0.30-0.40	0.60-0.80	1.10-1.40	≤0.035	≤0.035

It is up to customers' requirement.

Item	Standard
Casting Material	EN 10293/EN 10025/BS 3100/DIN 1681/DIN17205
Casting Tolerance in Blank	ISO 8062 CT 13
Size Tolerance	DIN ISO 2768m
NDT	ASTM A609 Level 2 or 3 /EN 12680/ASTM E94 Level 2 or 3
Heat Treatment	Normalizing+Tempering+Quenching
Hardness	As Required

Company Profile

Haian Haitai Casting. is established in 2003 in Huangqiao Town.

In 2007,we moved our factory to Sunzhuang town and now we can supply bigger steel castings with max. weight 45 tons.

In 2011,we built a new sand mold maiking workshop with 120 tons refinining furnace and the max. weight can be 120 tons.

In 2013,we paid more attenion on the castings for shipbuilding and started to supply marine castings for most of domestic famous shipyards.

From 2013 to 2022,we bought more and more machines to strengthen our ability from rough machining to finished machining.

In 2021,we built another new sand mold making workshop for the quick development of market requirement.

Now we monthly supply 6000 tons different castings for different customers of different industry,such as cement mill,shipubuilding,petroleum machinery,rolling mill,forging press and so on.

Prodcution Process

1)Pattern making

We have our own wooden pattern making workshop.But our company is always busy,
we also have around 10 sub-contractors for pattern making.
They help us for the pattern but will be inspected according to our rules.
We will record for every pattern inspection.

2)Silica or chorme sand cores
We have around 80 technicans for sand core making which is divided into around 10 teams.
Most of the technicans has more than 10 years' experience.
Most of the sand core is made by silica sand with common sand inside of it.
The common sand will be used repeatly.
For some important position,such as R corner,we will use chorme ore sand.
The outside of the sand core,we will do the painting,burn and clean it.
We will assemble diffrent sand cores together and wait for pouring.

3)Melting and Pouring

We always do the melting after mid-night for cheaper electric charge.
And we normally do pouring in the early morning.

No.	Equipment Name	Quantity(Set)
1	25 tons Electrical Arc Furnace	1
2	50 tons Intermediate Frequency Furnace	2
3	120 tons Refining Furnace	1
4	120 tons VD Furnace	2

Before and after pouring,we will do the chemical compostion test.4)Cooling

After pouring,we will wait for different time for cooling according to casting's weight.

Item	Weight in blank(Metric Tons)	Cooling Time(Hour)
1	<25	48
2	>25-40	72
3	>40-55	96
4	>55-72	120
5	>72-96	144
6	>96-115	168
7	>115	192

We have our experience and rules for cooling time.
After cooling,we will shake the casting out of the steel boxes and clean them.
5)Heat Treatment
Normalizing will be 3 days while tempering is 4 days.
We have around 10 sets of heat treatment furnaces.
The biggest one is 12m*9m*6m.
It is also the biggest size of castings we can make.
After heat treatment,we will do the mechanical property test.
Our ordinary test block's size is 230mm*70mm*50mm.
One casting part will min. have 3 pcs test blocks.
We have our testing center and it is approved by CNAS.
6)Draw the line and do the first rough machining
We can do the machining from rough to finished machining.

 

7)NDT after rough machining

 

8)Welding repair
We have rich experience for making support rollers and kiln tyres,
then there is no welding for the outside working position.
This is our special technology.
Every year we supply around 400pcs kiln tyres,930pcs support roller,170 sets gear( in two halves).
But for some other castings,if we do the welding repair,
we will do the tempering for stress relief later.
All of our welders have the SGS certficate.
9)Shot blasting and grindingWe have a robert grinder.We have a 120 tons rotary shot blasting table.
10)Final machining
We have a lot of vertical lathes from 2.5m to 10m. Certifications

We get approval from CNAS for our laboratory.
We also have 9 class certificate,such as ABS,DNV,NK,RINA,KR,CCS,BV and so on.

Packaging & Shipping

We supply a lot of castings for cement mill,rolling mill,shipbuilding and so on.

We can do the packing according to our rules or according to customers' requirement.

After Sales Service

Normally there is a 12 months quality warantty.

We do at least three times NDT:after rough,semi-finished and finished machining.

And also the customer will do the witness during or after finished machining.

If there is also any problem when you receive the castings,
please send us photos and detailed defects,
we will negotiate with you and make a compensation.

A third party inspection before shipment is welcomed.