INCONEL® alloy 22 (UNS N06022; W. Nr. 2.4602; NiCr21Mo14W) is a fully austenitic advanced corrosion-resistant alloy that offers resistance to both aqueous corrosion and attack at elevated temperatures. This alloy provides exceptional resistance to general corrosion, pitting, crevice corrosion, intergranular attack, and stress corrosion cracking. Alloy 22 has found numerous applications in the chemical/petrochemical processing, pollution control (flue gas desulfurization), power, marine, pulp and paper processing, and waste disposal industries. Alloy 22 is nickel-base and typically contains 22% chromium, 14% molybdenum, and 3% tungsten. Iron is normally limited to less than 3%. The alloy’s high content of chromium gives it good resistance to wet corrosion by oxidizing media (e.g., nitric acid and ferric and cupric salts). Its contents of molybdenum and tungsten give the alloy resistance to wet reducing media (e.g., sulfuric and hydrochloric acids). Alloy 22 exhibits excellent resistance to corrosive attack by seawater under stagnant and flowing conditions. At elevated temperatures, the high chromium level of INCONEL alloy 22 helps it resist oxidation, carburization, and sulfidation. Since it is nickel-base, alloy 22 resists high temperature attack by halides (e.g., chlorides and fluorides). With these attributes, the alloy is widely used to protect steel tubes and other components in coal-fired and waste-to-energy boilers. INCONEL alloy 22 products are covered by ASTM, ASME and ISO specifications. Alloy 22 is approved for construction of pressure vessels and components under the ASME Boiler and Pressure Vessel Code Section VIII, Division 1 for service up to 1250°F (677°C). The alloy is also approved byVdTÜV under Werkstoffblatt 479. The alloy is equivalent to and directly competes with Hastelloy® C-22® and Nicrofer® 5621hMoW alloys. The limiting chemical composition ranges for alloy 22 are presented in Table 1. Table 2 compares the combined alloying content (Cr+Mo+W+Nb) of INCONEL alloy 22 with other similarly alloyed materials. Physical properties are presented in Table 3; mechanical properties at room temperature are found in Table 4; thermal conductivity in Table 5. Mechanical properties at elevated temperatures are seen in Figure 1. Table 1 - Limiting Chemical Composition, %, of INCONEL alloy 22 (ASTM B 574, B 575, etc.)Nickel............................................................................Balance* Chromium....................................................................20.0-22.5 Molybdenum ...............................................................12.5-14.5 Iron ..................................................................................2.0-6.0 Tungsten..........................................................................2.5-3.5 Cobalt ...........................................................................2.5 max. Vanadium....................................................................0.35 max. Carbon......................................................................0.015 max. Manganese .................................................................0.50 max. Sulfur ..........................................................................0.02 max. Silicon .........................................................................0.08 max.Phosphorus ................................................................0.02 max. *Reference to the ‘balance’ of a composition does not guarantee this is exclusively of the element mentioned but that it predominates and others are present only in minimal quantities. Table 2- Typical Compositions of the Ni-Cr-Mo-W corrosion resistant alloys Alloy UNS Werkstoff Fe Ni Cr Mo W or PREN* Number Number Nb 686 N06686 2.4606 1 57 20.5 16.3 3.9 50.8 22 N06022 2.4602 2.5 59 21.5 14.1 3.1 47.3C-276 N10276 2.4819 6 57 15.5 16 3.9 45.4 625 N06625 2.4856 3 62 22 9 3.6Nb 40.8 C-4 N06455 2.4611 2 66 16 16 - 40.0 *PREN= %Cr + 1.5(%Mo + %W + %Nb)
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上海宝缘钢铁有限公司生产供应NS336(inconel625),无缝钢管、圆钢、管件、锻件、法兰、焊丝、配件等,并可定做各种非标材料。NS336(Inconel 625) 是一种镍铬钼合金,还有少量铌,用以加强合金的硬度,因此此合金不需要热处理就能增加很高的强度.此合金可以在很多种严酷的酸性环境中抵御腐蚀,特别是***腐蚀及裂隙腐蚀.运用于化学加工,航空领域,轮机引擎,污染控制设备,和核反应设备。
Inconel 625
1. 特性
该合金属于镍铬钼铌系镍基耐蚀,耐热固溶强化变形合金。
在650°C 以下具有优良的持久性能,疲劳性能,耐腐蚀和抗氧化性能。
由于含有较高的合金元素,能耐各种各样的腐蚀环境,能抗氯离子应力腐蚀裂纹。 该合金具有优良的耐点腐蚀性能和耐间隙腐蚀性能。
2. 化学成分(%)
Ni Nb(+Ta) Si Cr C S Mo Mn Fe Al Ti P Co
》58.0 3.15/4.15 《0.50 20.0-23.0 《0.10 《0.015 8.0-10.0 《0.5 《5.0 《0.40 《0.40 《0.015 《1.0
3. 机械性能
屈服强度 Mpa 抗拉强度 Mpa 延长率 (%)
》380 》830 》30
4. 物理性能
密度: 8.44 g/cm3 熔点: 1219-1350 °C
比热: 410 J/kg · °C 电阻率: 1.29 µΩ· m
5. 应用
软化退火后的低碳合金625广泛的应用于化工流程工业,较好的耐腐蚀性和高强度使之能作为较薄的结构部件。625合金可以应用于接触海水并承受高机械应力的场合。典型应用领域:
1.含氯化物的有机化学流程工艺的部件,尤其是在使用酸性氯化物催化剂的场合
2.用于制造纸浆和造纸工业的蒸煮器和漂白池
3.烟气脱硫系统中的吸收塔、再加热器、烟气进口挡板、风扇(潮湿)、搅拌器、导流板以及烟道等
4.用于制造应用于酸性气体环境的设备和部件
5.乙酸和乙酐反应发生器
6.硫酸冷凝器