ⓐ 维氏硬度:最小测试负载应为1.961N
ⓑ t=厚度,单位mm
注:
①OM:冷加工和时效处理以获得最低的抗拉强度。(cold-worked and age-treated to gain the minimum tensile strength.)
②1/4HM:经冷加工和时效处理后,其抗拉强度在OM和1/2HM之间。(cold-worked and age-treated to gain the tensile strength between tem- per grades OM and %HM.)
③1/2HM:经过冷加工和时效处理,可获得1/4HM和HM之间的抗拉强度。(cold-worked and age-treated to gain the tensile strength between tem- per grades 1/4HM and HM.)
④HM:经冷加工和时效处理,获得1/2HM和EHM之间的抗拉强度。(cold-worked and age-treated to gain the tensile strength between temper grades 1/2HM and EHM.)
⑤EHM:经冷加工和时效处理后,其抗拉强度达到HM级和XHM级之间。(cold-worked and age-treated to gain the tensile strength between tem- per grades HM and XHM.)
⑥XHM:经过冷加工和时效处理,可获得介于EHM和XHMS之间的抗拉强度。(cold-worked and age-treated to gain the tensile strength between tem- per grades EHM and XHMS.)
⑦XHMS:经过冷加工和时效处理,可获得介于EHM和XHMS之间的抗拉强度。(cold-worked and age-treated to gain the tensile strength between tem- per grades EHM and XHMS.)
⑧第一行至第四行是时效处理前的机械性能。
⑨第五行至第八行是时效处理后的机械性能。