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  • 2021-07-13

    Large diameter seamless steel tube – centrifugal casting

(Large diameter seamless heat-resistant tube) 

 

The current supply condition of large diameter seamless steel tube in Taiwan

There is no seamless steel tube manufacturer using traditional manufacturing method (piercing and rolling) in Taiwan.  (The only seamless steel tube corporation, Walsin Lihwa’s factory was located in China instead of Taiwan)

 

Due to the big scale of traditional seamless steel tube production over 3 thousand capitals, it is not the normal type of enterprise here.

The rolled seamless steel tubes are imported mainly, however there is the material limitation.  SS 304 and SS 316 are common and smaller diameter seamless steel tubes are easier to purchase.

But, it is difficult to get the large diameter seamless steel tubes and it is almost impossible to buy the large diameter seamless steel tubes of special steel.

For example, heat-resistant alloys and superalloy.

 

It’s not necessary to import large diameter seamless heat-resistant steel tube

The costs of purchase and stock are high if importing the large diameter seamless steel tubes not be produced by centrifugal casting.  Because it is not suitable for manufacturing small quantity by the traditional seamless steel tube production way ( piercing, rolling …etc).  Customers purchased the quantity more than their actual demands often.

It is normal to develop wrought heat-resistant materials by centrifugal casting technique.  Different centrifugal casting manufacturers have their own specifications of heat-resistant alloys and the high grade heat-resistant alloys are without the constraint of patents. 

Melting the liquid metal with the proper volume and pouring the liquid into the near shape mold to do the rotation by high speed is centrifugal casting.  This manufacturing method is good for producing small order quantitye specially for the special steel production.  For instance, large diameter seamless heat-resistant steel tubes.

We found out that most customers purchased our large diameter seamless heat-resistant steel tubes are the end users.  They purchased the new seamless steel tubes to replace the worn ones.  Considering all the aspects including costs, delivery time, customization), centrifugal casting is more cost-effective than rolling to produce large diameter seamless steel tubes no matter the material is common stainless steel or special steel. 

 

Large diameter seamless heat-resistant steel tube – Superalloy

Large diameter seamless superalloy tubes are as the catalyst tubes and pyrolysis tubes in the petrochemical industry.  HK40, HT, HU and HP are the common heat-resistant alloys and they are the materials for catalyst and pyrolysis tubes in the early age.  In the long run, those seamless heat-resistant steel tubes could not resist creep in the high temperature environment.  Therefore, several centrifugal casting corporations modified the common heat-resistant alloys to become the higher grade materials to be applied in the high pressure and temperature condition.  The high-performance materials are superalloy.  

 

Importing the large diameter seamless superalloy tubes are the mainstream now.   To supply our local demands efficiently, manufacturing the tubes locally is better.

We have continued to develop seamless superalloy tubes for several years and Incoloy 800H is the Ni-based alloy we developed successfully.

We look forward to seeing our seamless superalloy tubes applied in Taiwanese petrochemical plants and bringing our seamless tubes manufactured by centrifugal casting to the international stage!

 

 

The tables show the materials we are able to produce

 

i.            Large diameter seamless steel tube – Stainless steel 300 series

AISI spec.

ACI spec.

EN/DIN spec.

304 large diameter seamless steel tube

CF8 large diameter seamless steel tube

1.4308 GX6CrNi189 large diameter seamless steel tube

304L large diameter seamless steel tube

CF3 large diameter seamless steel tube

1.4306 X2CrNi19-11 large diameter seamless steel tube

316 large diameter seamless steel tube

CF8M large diameter seamless steel tube

1.4408 GX6CrNiMo18-10 large diameter seamless steel tube

316L large diameter seamless steel tube

CF3M large diameter seamless steel tube

1.4404/1.4409 X2CrNiMo17-12-2 large diameter seamless steel tube

310S large diameter seamless steel tube

CK20 large diameter seamless steel tube

 

347 large diameter seamless steel tube

CF8C large diameter seamless steel tube

1.4552, GX5CrNiNb18-9 large diameter seamless steel tube

317 large diameter seamless steel tube

CG8M large diameter seamless steel tube

 

317L large diameter seamless steel tube

CG3M large diameter seamless steel tube

 

Nitronic 60 large diameter seamless steel tube

CF10SMnN large diameter seamless steel tube

 

Nitronic 50 large diameter seamless steel tube

CG6MMN large diameter seamless steel tube

 

20Cb3 large diameter seamless steel tube

CN7M large diameter seamless steel tube

 

309 large diameter seamless steel tube

CH20 large diameter seamless steel tube

 

CE20N large diameter seamless steel tube

CD20N large diameter seamless steel tube

 

 

Nitronic 33 large diameter seamless steel tube

 

 

Nitronic 40 large diameter seamless steel tube

 

 

CN7MS large diameter seamless steel tube

 

AL6XN large diameter seamless steel tube

CN3MN large diameter seamless steel tube

 

254SMO, F44 large diameter seamless steel tube

CK3MCuN large diameter seamless steel tube

 

 

ii.            Larger diameter seamless steel tube – Stainless steel 400 series

AISI spec.

ACI spec.

EN/DIN spec.

410 large diameter seamless steel tube

CA15 large diameter seamless steel tube

1.4008 GX8CrNi13 large diameter seamless steel tube

416 large diameter seamless steel tube

416 large diameter seamless steel tube

 

420 large diameter seamless steel tube

CA40 large diameter seamless steel tube

1.4027 GX20Cr14 large diameter seamless steel tube

420F large diameter seamless steel tube

CA40F large diameter seamless steel tube

 

431 large diameter seamless steel tube

431 large diameter seamless steel tube

1.4059 GX22CrNi17 large diameter seamless steel tube

13-4 large diameter seamless steel tube, F6NM  large diameter seamless steel tube

CA6NM large diameter seamless steel tube

1.4313 GX5CrNi134 large diameter seamless steel tube

 

440A large diameter seamless steel tube

 

 

440B large diameter seamless steel tube

 

 

iii.            Large diameter seamless steel tube – Duplex stainless steel

Wrought grade

ACI spec.

EN/DIN spec.

 

CD4MCu large diameter seamless steel tube

 

2205 large diameter seamless steel tube , F51 large diameter seamless steel tube

CD3MN large diameter seamless steel tube

1.4470 GX2CrNiMoN22-5  large diameter seamless steel tube

Ferralium255 large diameter seamless steel tube

CD7MCuN large diameter seamless steel tube

 

 

CD4MCuN large diameter seamless steel tube

 

 

DPX-1B MOD large diameter seamless steel tube

 

2507 large diameter seamless steel tube, F53 large diameter seamless steel tube

CE3MN large diameter seamless steel tube

1.4469 GX2CrNiMoN26-7 large diameter seamless steel tube

 

CE8MN large diameter seamless steel tube

 

 

CD3MWCuN large diameter seamless steel tube

 

 

 i.            Large diameter seamless steel tube – Heat-resistant alloys

          ACI/CAST spec.

JIS spec.

EN/DIN spec.

HD large diameter seamless steel tube

SCH11 large diameter seamless steel tube

1.4823 GX40CrNiSi27-4 large diameter seamless steel tube

HE large diameter seamless steel tube

SCH17 large diameter seamless steel tube

 

HF large diameter seamless steel tube

SCH12 large diameter seamless steel tube

 

HH large diameter seamless steel tube

SCH13 large diameter seamless steel tube

1.4837 GX40CrNiSi25-12 large diameter seamless steel tube

HI large diameter seamless steel tube

SCH18 large diameter seamless steel tube

1.4846 X40CrNi large diameter seamless steel tube

HK large diameter seamless steel tube

SCH21 large diameter seamless steel tube

1.4848 GX40CrNiSi25-20 large diameter seamless steel tube

HK-40 large diameter seamless steel tube

SCH22 large diameter seamless steel tube

 

HL large diameter seamless steel tube

SCH23 large diameter seamless steel tube

 

HN large diameter seamless steel tube

 

 

HP large diameter seamless steel tube

SCH24 large diameter seamless steel tube

1.4857 GX40NiCrSi35-25 large diameter seamless steel tube

HT large diameter seamless steel tube

SCH15 large diameter seamless steel tube

 

HU large diameter seamless steel tube

SCH20 large diameter seamless steel tube

1.4865 GX40NiCrSi38-18 large diameter seamless steel tube

HW large diameter seamless steel tube

 

 

HX large diameter seamless steel tube

 

 

HP MOD large diameter seamless steel tube

 

1.4852 GX40NiCrNb35-25 large diameter seamless steel tube

CT15C large diameter seamless steel tube

 

1.4859 GX10NiCrNb32-20 large diameter seamless steel tube

 

 

 i.            Large diameter seamless steel tube – Cast iron

 Common name

ASTM spec.

EN/DIN spec.

NiResist D-2M large diameter seamless steel tube

Type D-2M large diameter seamless steel tube

GGG-NiMn23-4 large diameter seamless steel tube

NiResist 1 large diameter seamless steel tube

Type 1 large diameter seamless steel tube

 

GGL-NiCuCr 15 6 2 large diameter seamless steel tube

 

 

LAWAI INDUSTRIAL CORPORATION

No.1283-1, Ren-ai Road, Chunan Townshio, Miaoli County, Taiwan

+886-3-6581116

[email protected]

http://www.lawai-alloytube.com/