8.5.2.1 Shielding gasesThe qualification is restricted to nominal composition of the shielding gas used in the procedure test. The designation of ISO 14175 may be used to specify the shielding gas composition, e.g.ISO 14175:2008-M21-ArC-18.A deviation of max. ±20 % (relative) of the nominal composition of the CO2 content is allowed.However, an intentional addition or deletion of maximum 0,1 % of any gas component does not require a new welding procedure test.这里最后一句话应该怎么理解？
发表于 2022-12-3 01:17:02
