The proposal aims to examine how introducing 8% plastic strain in 316H steel through precompression, influences the intergranular strains in the material when loaded parallel and perpendicular to the pre-compression direction. A number of projects are being performed where 316H stainless steel material is subjected to this level of compressive pre-strain prior to fatigue, fracture toughness testing at room temperature, and creep rupture and creep crack growth testing at 550°C. In addition, pre-compression is performed for examining the influence of residual stress of fracture. In order to understand the influence of intergranular stresses on the creep and fracture processes, it is proposed that neutron diffraction measurements are performed to measure the lattice strain in-situ during loading of uniaxial tensile specimens of pre-compressed material at room temperature and 550°C.