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High Alloy Materials
High Alloy Materials

 

seamless stainless steel and nickel-based alloy tubes and pipes are our everyday passion and our history at salzgitter mannesmann stainless tubes. as early as 1885 reinhard and max mannesmann invented a rolling process for the production of seamless steel tubes in remscheid, Germany. in the 1890s they developed it futher until it reached marketability: the production method they invented was the pilger process, which still is widely in use today.

Our group integrates the tradition of three seamless stainless steel worlds (Mannesmann, Dalmine and Vallourec). Resulting in High AlloyStainlessfrom this international merger in 1994, High Alloybecame a part of Salzgitter group in 2003 and adjusted its name to Salzgitter Mannesmann Stainless Tubes in 2008.
With an international network of plants and offices, we are a global top player in our markets and a consistently reliable business partner, ensuring quick and customer focused answers to changing market requirements.Our customers profit from one of the most comprehensive product ranges in our business:
· from small instrumentation tubing to large pipe sizes with outside diameters from 6 to 250 mm (from 0.24 up to 9.84 inches) and with wall thicknesses from 0.5 up to 50 mm (from 0.02 up to 1.97 inches)· in materials from standard austenitic stainless, duplex and super-duplex steels to highly sophisticated nickel-based alloys this variety offers highest corrosion resistance, heat resistance and/or high-temperature, high-strength materials.

We combine high quality products for critical environments with efficient and reliable services: our customers thus enjoy a supportive personal account management.
Ongoing cycles of investment ensure that we work according to the latest technical standards. This gives us the trustworthiness to equip the so called critical spotsof customersplants, products and processes with the special qualities of our tubes and pipes.
Typically, these criticalservice conditions are defined e.g. by
· high temperatures
· high pressure
· aggressive media (acids or basic)

Characterization of heat resistant materials
Table 1 lists the international designations for selected SMSTTubes materials having improved austenite stability. The stability of the austenite in CrNi and CrNiMo steels is achieved by increasing the nickel content over that of standard 18/8 CrNi and 18/8/2 CrNiMo steels, and more especially by additions of nitrogen, which is particularly effective in promoting the austenite stability.
Typical properties of austenitic heat resistant materials include:
· high creep rupture strength above 550°C
· outstanding resistance to high-temperature corrosion and oxidation
· excellent processing characteristics.

High-temperature corrosion and oxidation
Although the loads that act on tubes in heat resistant materials are many and varied, they can be determined by calculation and can be controlled by appropriate materials selection and correct design. However, experience has shown that external influences occur during the service life of plants, which cannot be predicted at the planning and design stage, as they largely result from the actual operating conditions to which the tubes are exposed.
Most of these influences are related to high-temperature corrosion. Within the limits of the permissible temperature ranges,heat resistant austenitic steels generally exhibit excellent resistance to combustion gases with sufficient excess air.
To withstand the service conditions, the sensitivity of the material to oxidation on the steam-side is an important factor.
Regarding the scaling behaviour of superheater pipes in a conventional power station, the following influencing factors have to be taken into account when considering flue gases:
· flue gas temperature
· tube wall temperature
· tube position
· heat transfer by radiation
· fuel composition
· flue gas composition (e.g. reducing streaks)
· firing principle (e.g. dry or fused ash handling)
· ash content in flue gas
· erosion
These external influencing factors often determine the service life of a plant.

Corrosion-Resistant Alloy

product/thickness
(mm)

equivalent

1t

1.6t

2t

3t

4t

5t

6t

8t

10t

12t

14t

16t

20t

25t

30t

35t

40t

50t

remark

Alloy 59
UNS N06059

Alloy59(VDM)

o

O

O

O

O

O

O

O

ASTM B575
ASME SB575

Alloy C-276
UNS N10276

Hastelloy
C276

O

O

O

O

O

O

O

O

O

O

O

O

O

O

O

O

ASTM B575
ASME SB575
JIS NW0276

Alloy C-22
UNS N06022

Hastelloy
C22

O

O

O

O

O

O

O

O

O

O

O

O

O

O

O

O

O

O

ASTM B575
ASME SB575
JIS NW6022

Alloy B-2
UNS N10665

Hastelloy
B2

O

O

O

O

O

O

O

O

O

ASTM B333
ASME SB333

Alloy 400
UNS N04400

Monel 400

O

O

O

O

O

O

O

O

ASTM B127
ASME SB127
JIS NW4400

Alloy 825
UNS N08825

Incoloy
825

O

O

O

O

O

O

O

O

ASTM B424
ASME SB424
JIS NcF825

Alloy 20
UNS N08020

Carpenter
20Cb3

O

O

O

O

O

O

O

O

ASTM B463
ASME SB463

Alloy 201
UNS N02201

Nickel 201

O

O

O

O

O

O

O

O

O

O

O

ASTM B162
ASME SB162
JIS NW2201

Heat-Resistant Alloy Inventory

product/thickness
(mm)

equivalent

1t

2t

3t

4t

5t

6t

8t

10t

12t

14t

16t

20t

25t

30t

40t

50t

remark

Alloy 625
UNS N06625

Inconel
625

O

O

O

O

O

O

O

O

O

ASTM B443
ASME SB443

Alloy 600
UNS N06600

Inconel
600

O

O

O

O

O

O

O

O

O

O

O

ASTM B168
ASME SB168
JIS NcF600

Alloy 601
UNS N06601

Inconel
601

O

O

O

O

O

O

O

O

O

O

ASTM B168
ASME SB168
JIS NcF601

Alloy 800H/HT
UNS N08810
UNS N08811

Incoloy
800H/HT

O

O

O

O

O

O

O

O

ASTM B409
ASME SB409
JIS NcF800H

Titanium ASTM B265

product/thickness
(mm)

equivalent

1t

2t

3t

4t

5t

6t

8t

9t

10t

12t

15t

18t

20t

remark

Grade 2

O

O

O

O

O

O

O

O

O

O

O

O

ASTMB265

Duplex/Super Austenitic Stainless Steel

product/thickness
(mm)

equivalent

1t

2t

3t

4t

5t

6t

8t

9t

10t

12t

14t

16t

20t

25t

30t

remark

254SMO
UNS S31254

O

O

O

O

O

185N
UNS S31254

O

O

O

O

O

O

O

O

ASTM A240

DP3W
UNS S39274

O

O

O

O

O

O

O

O

O

329J4L
UNS S32506

O

O

O

O

O

O

O

O

NAS254N
UNS S32053

SUS 836L

O

O

O

O

O

O

Contact us about thickness which are not listed in this inventory.

 

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JIANGSU HAOHUA INDUSTRY GROUP
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