Attachment 0001-Drawing 12593260.pdf

This is a technical specification document for CRES (Chromium Reducing Electroless Stainless) heat treatment and processing procedures, part number 12593260. The document establishes general requirements for pre-weld and post-weld heat treatment of stainless steel components manufactured in accordance with ASTM A564/A564M, A351, A743, and A276 specifications, with particular focus on martensitic stainless steel grades UNS S15500, S17400, and S45000.

The specification defines cutting and forming procedures, requiring that bending and forming operations be conducted only on material in the solution-annealed condition, with machining used to remove working effects unless otherwise specified. Material shall not be flame cut, and shapes may be plasma arc cut with oxidation removed by machining. The document provides detailed heat treatment requirements across multiple stages: pre-weld heat treatment (stage 1 minimum 2 hours at 1300°F ±25°F followed by air cooling), post-weld heat treatment (stage 2 of 2 hours at 1300°F ±25°F with air cooling), softening procedures (stage 2 of 2 hours at 1300°F ±25°F with air cooling), and hardness treatment specifications. All treatments require overaging at 475°F for 1 hour unless specified otherwise. The specification includes mechanical property requirements with tensile strength ranging from 135-160 KSI to 140-170 KSI depending on the control drawing, 0.2% proof stress specifications, elongation and hardness parameters, and references specification control drawings UNS S15900, UNS S17400, and UNS S45000. The document is approved for public release with unlimited distribution.