1.1本试验方法涵盖了评估和控制氢脆可能性的机械试验，氢脆可能来自各种氢源，如电镀过程中的氢源、流体、清洁处理、维护化学品和可能接触钢表面的气体环境。 1.2规定了使用AISI E4340钢加热的五种试样的程序和要求，并证明了其灵敏度。本试验方法不用于测量其他钢的相对敏感性。 1.3本试验方法假设AISI E4340钢在51HRC-54HRC下（根据表1的规定确定为敏感）是最坏的情况；也就是说，所有其他热处理的高硬度钢不太容易发生氢脆。 1.4对于测试维护化学品，必须在试样周围隔离安全壳室，如图1中1a型所示。如果将试样和自加载框架浸入维护化学品中，则测试夹具必须由AISI E4340钢制成，但可以在482+14°C（900+25°F）下回火至40HRC-43HRC，进行真空熔炼并热处理至较低硬度。这样做是为了最大限度地减少可能影响测试结果的电流耦合的任何极化效应。 1.5还规定了每种类型的试样几何形状、等效载荷条件和通过/失败要求。 1.6分类-氢脆试验可使用以下规定的试样进行: 1.6.1类型1-缺口: 1.6.1.1 1a型-在恒定载荷下承受张力的圆钢筋。 1.6.1.2 1b型-圆形钢筋，张力加载，带自加载环。 1.6.1.3 1c型-带自加载框架的弯曲加载圆钢筋。 1.6.1.4 1d型-C型环用自加载螺栓弯曲加载。 1.6.2类型2-光滑（无缺口）。 1.6.2.1 2a型-用位移棒弯曲加载的环形试样。 1.7本标准无意解决与其使用相关的所有安全问题（如有）。本标准的用户有责任在使用前制定适当的安全和健康实践，并确定监管限制的适用性。 1.8本试验方法仅限于暴露于以下环境中的钢的氢脆试验: 1.8.1电化学电镀工艺。 1.8.2镀镉后的维护化学品。 1.9以可接受的公制单位表示的值应视为标准。

1.1 This test method covers mechanical tests for the evaluation and control of the potential for hydrogen embrittlement that may arise from various sources of hydrogen as in plating processes, from fluids, cleaning treatments, maintenance chemicals, and gaseous environments that may contact the surface of steels. 1.2 The procedures and requirements are specified for five types of test specimens using a heat of AISI E4340 steel with demonstrated sensitivity. This test method is not intended to measure the relative susceptibility of other steels. 1.3 This test method assumes that AISI E4340 steel at 51HRC-54HRC, determined to be sensitive as specified in Table 1, is the worst case; that is, all other heat treated, high-hardness steels are less susceptible to hydrogen embrittlement. 1.4 For testing maintenance chemicals, the containment chamber must be isolated around the test specimen, as shown in Fig. 1 for Type 1a. If the test specimen and self-loading frame are to be immersed into the maintenance chemical, then the test fixture must be made from AISI E4340 steel except that it can be vacuum melted and heat treated to a lower hardness by tempering at 482 + 14°C (900 + 25°F) to a hardness of 40HRC-43HRC. This is done in order to minimize any polarization effects of galvanic coupling that would influence the test results. 1.5 Specimen geometries, equivalent loading conditions, and the pass/fail requirements for each type are also specified. 1.6 Classification -Hydrogen embrittlement tests can be performed with specimens as specified in the following: 1.6.1 Type 1-Notched: 1.6.1.1 Type 1a -Round bar, loaded in tension, under constant load. 1.6.1.2 Type 1b -Round bar, loaded in tension, with self-loading ring. 1.6.1.3 Type 1c -Round bar loaded in bending with self-loading frame. 1.6.1.4 Type 1d -C-rings loaded in bending with self-loading bolt. 1.6.2 Type 2 -Smooth (Unnotched). 1.6.2.1 Type 2a -Ring specimens loaded in bending with displacement bars. 1.7 This standard does not purport to address all of the safety problems, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. 1.8 This test method is limited to hydrogen embrittlement testing of steels that are exposed to the following: 1.8.1 An electrochemical plating process. 1.8.2 Maintenance chemicals, subsequent to cadmium plate. 1.9 The values stated in acceptable metric units shall be regarded as the standard.