JIS G 5122-1991 Heat-resistant steel castings

JIS G 5122-1991 Heat Resistant Castings

The JIS G 5122-1991 international standard is a guideline which has been put in place to promote the production and use of high quality heat resistant castings. Heat resistant castings are used in a variety of applications where reliability and longevity are absolutely essential. Heat resistant castings are used to make components for power plants, metal smelting, chemical plants, and other high temperature environments.

Heat resistant castings are manufactured using a variety of alloys, but the most common alloys used in the manufacturing of these products include stainless steels, nickel-base alloys, cobalt-base alloys and iron-base alloys. The JIS standard requires that all heat resistant castings have a minimum chemical composition specified in order to guarantee their quality and reliability. The specific composition of these materials will depend on the application for which they will be used.

The JIS standard also outlines the requirements for the mechanical properties of these materials. The mechanical properties are primarily designed to ensure the strength and reliability of the casting. These properties include tensile strength, yield strength, hardness, elongation, brittleness temperature and impact strength. The level of these properties will determine the lifespan and performance of the finished casting.

The JIS G 5122-1991 standard also outlines the acceptable limits for impurities in these materials. These limits are important because it ensures that the heat resistant casting has the right level of purity. Not only does this protect the performance of the casting, it also ensures that the material is safe to work with. The levels of impurities are set in order to eliminate any potentially hazardous conditions while using the heat-resistant castings.

Finally, the JIS G 5122-1991 standard addresses the process to be used in the production of these castings. It outlines the quality requirements to be met in both the production process and the testing of these products. It also addresses the requirements for metallurgical examination, machining and finishing operations for the heat resistant castings. In addition, it outlines the required inspection process which must be followed in order to ensure the quality and reliability of the heat resistant casting.

The JIS G 5122-1991 international standard is a comprehensive standard that provides a reliable framework for the production and use of high quality heat-resistant castings. By following this standard, manufactures can be confident that they are producing quality castings which are able to withstand high temperatures and which are safely able to be used in applications where reliability and longevity are critical.

翻译

JIS G 5122-1991 specifies the cast heat-resistant steels used in various applications. These steels are used in a range of industrial applications, including boilers, heat exchangers, valves, pumps and turbines. Generally, the strength and corrosion resistance of these steels improve with increasing alloy content. The grades range from mild steel to high temperature grades designed for elevated temperatures up to 1100°C. Some of the grades specified in the standard are: AISI 309H, AISI 310H, AISI 316LN, AISI 321H, AISI 347H and AISI 410H. The chemical compositions of these steels are specified in the standard. It also classifies the steels according to their ductility and impact properties. The properties of each grade are provided in the standard. Additionally, the mechanical and chemical properties of welded joints are also covered in this standard. It provides requirements on manufacturing, inspection and testing of cast heat resistant steels. The mechanical tests required to be performed by the manufacturer include tensile strength tests, impact tests and bend tests. The quality of the castings are ascertained after performing visual, dimensional and non-destructive tests. Finally, this standard provides guidelines on quality assurance of the castings.

JIS G 5122-1991指定了多种应用中使用的铸造耐热钢。这些钢材用于各种工业应用，包括锅炉、换热器、阀门、泵和涡轮机。通常，这些钢材的强度和耐腐蚀性随着合金含量的增加而提高。这些级别范围从低碳钢到专为高温1100°C而设计的高温级别。这些钢材的化学成分在标准中指定。它还根据钢材的延性和冲击性能将钢材分类。标准中为每一等级提供了属性，还涵盖了焊接接头的机械性能和化学性能。它还提供了铸造耐热钢的制造、检验和测试要求。生产商必须执行的机械试验包括拉伸强度试验、冲击试验和弯曲试验。在执行视觉、尺寸和无损检验后，确定铸件的质量。最后，本标准提供了铸件质量保证的指导方针。