本文件描述了应用于2-1/4Cr-1Mo-1/4V（22V）焊缝熔敷的切口C型环再热裂纹试验（NCRRCT）。最近，其他实体已着手设计满足工业需求的再热开裂试验，以了解商用22V耗材的再热开裂行为。本公告将对三种测试进行比较和对比，以使读者了解这些方法。人们强烈认为，NCRRCT通过满足所有属性来执行其他测试？理想焊接性试验，？因为它使用简单，价格低廉，因为不需要特殊设备，与实际制造直接相关，可重复，可以证明焊接相关变量的影响，对试验变量（如化学）的微小变化敏感，并且适用于所有焊接工艺[1]。 讨论了NCRRCT的发展和33多年来用于Cr-Mo-V和其他钢的再热裂纹评估的历史。本文针对18种不同的实验室和商业焊接件定义了试验与2-1/4Cr-1Mo-1/4V（22V）焊缝熔敷层再热裂纹评估的直接关系。对22V埋弧焊（SAW）熔敷层进行的试验表明，杂质元素对22V合金的再热裂纹倾向有直接影响。NCRRCT的简单性使其几乎可以被任何工程实验室用于评估和排序22V焊接熔敷。此外，正如之前试验的历史使用所证明的，它可以很容易地应用于确定母材热影响区（HAZ）和焊缝熔敷层对再热裂纹的敏感性。 因此，建议采用NCRRCT对22V SAW焊接耗材和其他类似合金进行再热裂纹评估。

This document describes the Notched C-Ring Reheat Cracking Test (NCRRCT) as applied to 2-1/4Cr-1Mo-1/4V (22V) weld deposits. Recently, other entities have set out to design a reheat cracking test which satisfies the needs of industry, in regard to reheat cracking behavior of commercial 22V consumables. This Bulletin will compare and contrast three tests to provide the reader with an understanding of the methodologies. It is strongly felt that the NCRRCT out-performs other tests by meeting all attributes of the?Ideal Weldability Test,?in that it is simple to use, inexpensive since no special equipment is required, shows a direct correlation with actual fabrication, is reproducible, can demonstrate the effects of welding-related variables, is sensitive to small changes in test variables (such as chemistry), and is applicable to all welding processes [1].The NCRRCT development and history of more than 33-years in the assessment of reheat cracking as applied to Cr-Mo-V and other steels is discussed. The direct relationship of the test to the reheat cracking assessment of 2-1/4Cr-1Mo-1/4V (22V) weld deposits is defined herein for 18 different laboratory and commercial weldments. The testing employed with 22V Submerged Arc Weld (SAW) deposits shows the direct effect of tramp elements on the reheat cracking propensity of the 22V alloy.The simplicity of the NCRRCT enables it to be used by nearly any engineering laboratory for the evaluation and ranking of 22V weld deposits. Furthermore, as borne out by the prior historical use of the test, it can readily be applied to the determination of both the base metal Heat Affected Zone (HAZ) and weld deposit sensitivity to reheat cracking. Thus, it is recommended that the NCRRCT be adopted for reheat cracking evaluations of 22V SAW welding consumables and other similar alloys.