• <strike id="w4mci"><s id="w4mci"></s></strike>
    • SALES CALLS:+8615504341996
    • AFTER THE PHONE:+8618643001113

    Ten kinds of materials commonly used for heat exchange and their applicable conditions

    2021-05-12 hits: column:NEWS CENTER

    ① Type 304 stainless steel

    This is the cheapest and most widely used austenitic stainless steel (such as food, chemical, atomic energy and other industrial equipment). Suitable for general organic and inorganic media. For example, nitric acid with concentration < 30% and temperature ≤100℃ or concentration ≥ 30% and temperature < 50℃; Carbonic acid, ammonia water and alcohols with various concentrations at temperature ≤100℃. Poor corrosion resistance in sulfuric acid and hydrochloric acid; It is especially sensitive to crevice corrosion caused by chlorine-containing media (such as cooling water).

    ② 304L stainless steel

    Corrosion resistance and application are basically the same as those of Type 304. Because the carbon content is lower (≤ 0.03%), the corrosion resistance (especially intergranular corrosion resistance, including weld zone) and weldability are better, and it can be used for semi-welded or all-welded PHE.

    ③ Type 316 stainless steel

    Suitable for general organic and inorganic media. For example, natural cooling water, cooling tower water and demineralized water; Carbonic acid; Acetic acid and caustic lye with concentration < 50%; And solvents such as alcohols and acetone; Diluted nitric acid with temperature ≤100℃ (concentration < 20% =, diluted phosphoric acid (concentration < 30% =, etc.). However, it is not suitable for sulfuric acid. Because it contains about 2% Mo, its corrosion resistance in seawater and other chlorine-containing media is better than that of Type 304, and it can completely replace Type 304, as shown in Table 1-34. Is pre25.

    ④ 316L stainless steel

    Corrosion resistance and application are basically the same as those of Type 316. Because the carbon content is lower (≤ 0.03%), the weldability and corrosion resistance after welding are also better, and it can be used for semi-welded or all-welded PHE. Is pre25.

    ⑤ Type 317 stainless steel

    It is suitable for working conditions that require a longer service life than model 316. Because the content of Cr, Mo and Ni elements is slightly higher than that of type 316, it has better resistance to crevice corrosion, pitting corrosion and stress corrosion. PRE is 30.

    ⑥ AISI 904L or SUS890L stainless steel

    This kind of austenitic stainless steel is cost-effective with consideration of both price and corrosion resistance. Its corrosion resistance is better than the above materials, and it is especially suitable for common acids and halides (including Cl-and F-) such as sulfuric acid and phosphoric acid. Because of the high content of Cr, Ni and Mo, it has good resistance to stress corrosion, pitting corrosion and crevice corrosion. PRE is 36.

    ⑦ Avesta 254 SMO high-grade stainless steel

    This kind of ultra-low carbon high-grade stainless steel is improved by increasing Mo content. It has excellent chloride pitting corrosion resistance and crevice corrosion resistance, and is suitable for medium containing salt water, inorganic acid, etc. that can't be used in type 316. Is pre47.

    ⑧ Avesta 654 SMO high-grade stainless steel

    It is an ultra-low carbon high-grade stainless steel with Cr, Ni, Mo and N contents higher than 254 SMO, which is resistant to

    The corrosion performance of chloride is better than that of 254 SMO, and it can be used in cold seawater. Is pre64.

    Pet-name ruby RS-2 (OCR20ni26mo3cu3si2nb) stainless steel

    This is a domestic Cr–Ni–Mo–Cu stainless steel. The pitting corrosion resistance and crevice corrosion resistance are equivalent to Type 316, while the stress corrosion resistance is better. It can be used for concentrated sulfuric acid (concentration 90 ~ 98%) below 80℃ with annual corrosion rate ≤ 0.04 mm/a. Is pre29.

    ⑩ Incoloy 825

    It is a Ni (40%)–Cr (22%)–Mo (3%) high-grade stainless steel. Incoloy is a registered trademark of theInternational Nickel Co, Ltd. Suitable for sulfuric acid with various concentrations at low temperature; In 50% ~ 70% caustic alkali (such as NaOH) solution, it has good corrosion resistance and does not produce stress corrosion cracking. However, it is sensitive to crevice corrosion caused by chloride. In addition, the stamping performance is not very good, so it is not a common material for sheet metal. PRE is 32.


    Sales calls: +8615504341996
    After-sales telephone: +8618643001113
    Address:Room 101, Floor 1, West Side of North Xinhua Street, Sanhe Village, Pingxi Town, Tiexi District, Siping City, Jilin Province
    Landline:+86 0434-3630077
    Fax:+86 0434-7780077
    COPYRIGHT ? SPCDHR.COM Siping Chengda Heat Exchange Equipment Manufacturing Co., Ltd All rights reserved 吉ICP備17004051號-1 Technical support:中諾科技
    LINK
    COPYRIGHT ? SPCDHR.COM Siping Chengda Heat Exchange Equipment Manufacturing Co., Ltd All rights reserved 吉ICP備17004051號-1 Technical support:中諾科技
    亚洲国产成人一区二区精品区| 精品久久久无码21p发布| 国产成人vr精品a视频| 国产精品乱码一区二区三| 久久精品免视看国产陈冠希| 国产69久久精品成人看| 日产精品久久久一区二区| 亚洲国产成人精品久久久国产成人一区二区三区综 | 欧乱色国产精品兔费视频| 国产精品最新国产精品第十页| 国产精品一二三区| 国产成人精品999在线观看| 国产精品小视频免费无限app| 亚洲国产精品美女久久久久| 午夜精品美女写真福利| 国产小呦泬泬99精品| 日韩一区二区三区在线精品| 国产精品久久久久乳精品爆 | 高清在线亚洲精品国产二区| 亚洲精品色播一区二区| 91精品国产91久久久久| 国产精品视频一区二区三区四 | 日本精品在线视频| 精品国产综合区久久久久久| 国产精品国产免费无码专区不卡| 国产精品久久久久久搜索| 久久永久免费人妻精品下载| 在线观看亚洲精品福利片 | 久热精品视频在线观看99小说| 久久99精品久久久久久齐齐| 香蕉视频在线精品| 国产精品林美惠子在线观看| 久久精品熟女亚洲av麻豆| 久久亚洲精品国产精品婷婷| 国产精品网站在线观看| 久久热这里只有精品在线观看| 色妞ww精品视频7777| 国产精品无码av在线播放| 精品人成电影在线观看| 国产视频精品免费| 97精品伊人久久大香线蕉|