Yosun (Tianjin) Piping Engineering Co., Ltd. is one of the most credible manufacturers and suppliers of carbon steel forgings in China. Please feel free to wholesale customized carbon steel forgings at competitive price from our factory. If you have any enquiry about quotation, please feel free to email us.
Hardness
The purchaser may check the hardness of any or all forgings supplied at any location on the forging and the hardness shall be 137 to 187 HBW.All forgings not within the specified hardness range shall be rejected.
Heat Treatment
1.All forgings shall be heat treated as specified by the purchaser.
2.When forgings not requiring heat treatment by 6.1 are supplied heat treated by purchaser request,the basis for determining conformance with Table 2 and Table 3 shall be hardness testing per 8.4 and either(1) tensile testing of heat treated forgings per 8.2,or (2) tests from as-forged forgings or separately forged test blanks,as agreed upon between the supplier and purchaser.
3.When test reports are required,and tensile test results were obtained from as-forged forgings or as-forged test blanks,it shall be so indicated on the test report.
4.In addition to the marking required by Section 15,this specification shall be followed by the letter:A for annealed,N for normalized,NT for normalized and tempered,or QT for quenched and tempered,as appropriate.
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