ASTM A194/A194M-23由美国材料与试验协会 US-ASTM 发布于 2023-05-01。
ASTM A194/A194M-23在国际标准分类中归属于: 21.060.20 螺母。
ASTM A194/A194M-23 用于高压或高温或两者的螺栓的碳钢、合金钢和不锈钢螺母的标准规范的最新版本是哪一版?
最新版本是 ASTM A194/A194M-24 。
* 在 ASTM A194/A194M-23 发布之后有更新,请注意新发布标准的变化。
1.1 This specification2 covers a variety of carbon, alloy, and martensitic stainless steel nuts in the size range 1⁄4 through 4 in. and metric M12 through M100 nominal. It also covers austenitic stainless steel nuts in the size range 1⁄4 in. and M12 nominal and above. These nuts are intended for high-pressure or high-temperature service, or both. Grade substitutions without the purchaser’s permission are not allowed. 1.2 Bars from which the nuts are made shall be hot-wrought. The material may be further processed by centerless grinding or by cold drawing. Austenitic stainless steel may be solution annealed or annealed and strain-hardened. When annealed and strain hardened austenitic stainless steel is ordered in accordance with Supplementary Requirement S1, the purchaser should take special care to ensure that 8.2.2, Supplementary Requirement S1, and Appendix X1 are thoroughly understood. 1.3 Supplementary requirements of an optional nature are provided. These shall apply only when specified in the inquiry, contract, and order. 1.4 This specification is expressed in both inch-pound units and in SI units. However, unless the order specifies the applicable “M” specification designation (SI units), the material shall be furnished to inch-pound units. 1.5 The values stated in either inch-pound units or SI units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard. Within the text, the SI units are shown in brackets. 1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
碳(1)含碳量的增加,使得碳素钢的强度和硬度增加,而塑性、韧性和焊接性能下降。(2)一般情况下,当含碳量大于0.25%时,碳钢可焊性开始变差,故压力管道中一般采用含碳量小于0.25%的碳钢。含碳量的增加,其球化和石墨化的倾向增加。(3)作为高温下耐热用的高合金钢,含碳量应大于或等于0.04%,但此时奥氏体不锈钢的抗晶间腐蚀性能下降。...
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高温蝶阀广泛应用于冶金,化工,建材,电站等行业中的超高温气体管道中,作为高温气体介质调节或切断;与各种执行器(电动,气动,蜗轮)配套使用组成不同性能的阀门,可实现远距离控制和自动调节和切断。 ...
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