The flow stresses of the heat affected zone (HAZ) of the STKM11A welded tube are determined by an empirical law based on the Vikers Hardness (HV) distribution in circumferential direction of the tube.

• 摘要基于周向显微硬度的分布及经验公式法，确立了STKM11A焊缝管热影响区的流动应力；