SA179材料硬度是多少？

您好，请问一下，ASTM A179 和 SA179 标准的钢管材料的硬度是多少？在线等答案！！！

2024年04月14日 | 2358人阅读

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张靖雯

太极钢管、董经理¹³³³⁷⁸⁸³⁰⁸⁶ 、张靖雯等3人赞同

帮你查了一下原标准文件 ASTM A179 和 SA179 标准的钢管材料的硬度是 ≤ 72HRB。

原标准文章中是这样讲的：

10. Hardness Requirements：10.1 The tubes shall have a hardness number not exceeding 72 HRB.

10．硬度要求：10.1 钢管的硬度系数不得超过 72 HRB.

11.4 Hardness Test—Rockwell hardness tests shall be made on specimens from two tubes from each lot. The term lot applies to all tubes, prior to cutting, of the same nominal diameter and wall thickness which are produced from the same heat of steel. When final heat treatment is in a batch-type furnace, a lot shall include only those tubes of the same size and the same heat which are heat treated in the same furnace charge. When the final heat treatment is in a continuous furnace, a lot shall include all tubes of the same size and heat, heat treated in the same furnace at the same temperature, time at heat, and furnace speed.

11.4 硬度测试：从每批（注意事项2）中抽取2 支钢管进行洛氏硬度测试。“一批”应包括所有的，在切头尾前，同一热处理和同批钢坯生产的，有相同的名义直径和壁厚的钢管。在同一型号的同一热处理炉中进行最后的热处理时，“一批”应指所有在同一炉中进行热处理的同尺寸的钢管。当最后热处理在连续式热处理炉中进行时，“一批”应包括所有的同尺寸，热度，在同一炉中同样温度，时间，速度进行热处理的钢管。

2024年04月14日