SAE AMS 6409D-2012 标准化和回火的专用航空器质量清洁钢棒,铸件和管0.80Cr 1.8Ni 0.25Mo (0.38-0.43C)(SAE 4340)

标准号：SAE AMS 6409D-2012
中文标准名称：标准化和回火的专用航空器质量清洁钢棒,铸件和管0.80Cr 1.8Ni 0.25Mo (0.38-0.43C)(SAE 4340)
英文标准名称：Steel, Bars, Forgings, and Tubing 0.80Cr 1.8Ni 0.25Mo (0.38-0.43C) (SAE 4340) Special Aircraft Quality Cleanliness, Normalized and Tempered
标准类型：V11
发布日期：2012/6/27 12:00:00
实施日期：1999/12/31 12:00:00
中国标准分类号：V11
国际标准分类号：49.025.10
引用标准：ASTM A 255-2010;ASTM A 370-2012;ASTM E 112-2010;ASTM E 350-1995;ASTM E 381-2001;ASTM E 384-2011;SAE AMS-H-6875-1998;SAE AMS 2251;SAE AMS 2253;SAE AMS 2259;SAE AMS 2304-1991;SAE AMS 2370;SAE AMS 2372;SAE AMS 2759/1;SAE AMS 2806;SAE AMS 2808;SAE ARP 1110;SA
适用范围：This specification covers a low-alloy steel in the form of bars, forgings, mechanical tubing, and forging stock. These products have been used typically for parts required to meet stringent magnetic particle inspection criteria, having sections 3.5 inches (89 mm) and under in nominal thickness at time of heat treatment, and requiring a through-hardening steel capable of developing a minimum hardness of 40 HRC when properly hardened and tempered and also for parts of greater thickness but requiring proportionately lower hardness, but usage is not limited to such applications. Certain design and processing procedures may cause these products to become susceptible to stress-corrosion cracking after heat treatment; ARP 1110 recommends practices to minimize such conditions. These products are not recommended for use in parts heat treated to a hardness greater than 46 HRC (ultimate tensile strength over 220 ksi (1517 MPa)) or where the high transverse properties of remelted steel are required.