| 代号 | 含义（英） | 含义（中） |
| +CH | core hardenability | 芯部可淬性 |
| +H | hardenability | 可淬透性 |
| 0 | through thickness property; minimum reduction of area= 15 % | 厚度方向性能级别；最小断面收缩率=15% |
| 0 | through thickness property; minimum reduction of area = 25 % | 厚度方向性能级别；最小断面收缩率=25% |
| 0 | through thickness property; minimum reduction of area = 35 % | 厚度方向性能级别；最小断面收缩率=35% |
| +A | hot dip aluminium coating | 热浸铝涂层 |
| +AS | aluminium silicon alloy coating | 铝硅合金涂层 |
| +AZ | aluminium zinc alloy(> 50 % Al) coating | 铝锌合金（>50%铝）涂层 |
| +GE | electrolytic chromium/chromium oxide coating (EGGS) | 电解铬/氧化铬涂层(EGGS) |
| +CU | copper coating | 镀铜 |
| +IC | inorganic coating | 无机涂料 |
| +OC | organic coating | 有机涂层 |
| +S | hot dip tin coating | 热浸镀锡 |
| +SE | electrolytic tin coating | 电解镀锡 |
| +T | hot dip lead tin alloy (terne) coating | 热浸铅锡合金镀层 |
| +TE | electrolytic lead tin alloy (terne) coating | 电解铅锡合金镀层 |
| +Z | hot dip zinc (galvanised) coating | 热浸锌（镀锌）涂层 |
| +ZA | hot dip zinc aluminium(> 50 % Zn) coating | 热浸镀锌铝（>50%锌）涂层 |
| +ZE | electrolytic zinc coating | 电解镀锌 |
| +ZF | hot dip zinc iron (galvannealed) coating | 热浸镀锌铁（电镀）涂层 |
| +ZN | electrolytic zinc nickel alloy coating | 电解锌镍合金镀层 |
| 核心作用：标识钢铁产品的特殊性能要求，这些要求通常属于钢铁本身特性，因实际需要作为产品符号处理。 |
| 符号规则：符号与前面的名称用 “+” 分隔。 |
| 主要符号及含义： |
