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            WELCOME TO HAOHUA
            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
            Tel: 0086-512-58220050 Fax:0086-512-58810865 E-mail: sales@haopipe.com
            Add: No.17,Southeastern Avenue, Economic Development Zone (South Area),Zhangjiagang City, Jiangsu Province, China.
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