Stainless steel wire and stainless steel plate and steel strip surface defect allowable range

Stainless steel surface defects allowed range in standard just for stainless steel wire JIS G4308, provisions on the defect depth, wire diameter 14mm below, the length direction of the crack like depth not more than 0.15mm; when the wire diameter more than 14mm, by supply and demand consultation between the two sides agreed. Other varieties are only in the use of the principle does not exist harmful defects.
In hot rolled stainless steel plate and steel strip G4304 JIS and cold rolled stainless steel plate and strip G JIS 4305, the stipulation "the strip and the strip steel does not have the harmful flaw in the use. However, because the strip in general in the production process to eliminate the defects of the opportunity is not, so allow a number of abnormal parts"
Strip "a number of abnormal parts" of the provisions of the stainless steel manufacturers are set by the internal product quality standards. In the 1m long which has 1 points and so on counts as the flaw. Generally speaking, a good part in more than 90% of the qualified products.
Stainless steel thick plate is used for chemical industry equipment, chemical industry with large tanks or nuclear power industry and other important facilities, in the use of harmful defects of the grade, is indeed a difficult task. Author now on chemical industry equipment, chemical industry with large tank inspection, comprehensive personal experience that the cover type scales necessary grinding away. The depth of flaw in 0.5mm is not a problem, can be considered, in order to ensure the quality, the depth of the following defects in 0.3mm can be allowed.