The problem is that the mechanical properties which are specified in the ASTM spec for A217 CA15 are for a “soft” (low hardness) condition as defined in the standard. However, the valve standards such as API 600 which define the required hardness of seating surfaces for different trims require significantly high hardness than the condition defined in A217 for CA15 material. Therefore, the required higher hardness condition likely will not meet the Elongation or Reduction of Area requirements in the ASTM spec. Therefore, for these higher hardness applications, we only require that chemistry and hardness be reported since the mechanical properties in the ASTM standard are for a different heat treat / hardness condition than the actual parts. The hardened material may meet the ASTM requirements in some cases and in these cases the foundry may report them to us. This is why we have the information in some cases and not in all cases.