GB/T 37400.6-2019 Heavy mechanical general technical specification—Part 6：Steel castings English
This part of GB/T 37400 specifies the order requirements,manufacture processes,technical requirements,inspection rules,test methods,retest and re-heat treatment,quality certificates,markings and packaging of carbon steel and low alloy steel castings for heavy machinery.
This part is applicable to the carbon steel or low alloy steel castings cast in sand mould or casting mould with equivalent thermal conductivity.
This part is not applicable to the casting of high manganese steel,heat resistant steel,stainless steel and other non-structural steel grades.
3 Order requirements
3.1 In the contract or agrecment, standard number , casting name, drawing number , material number, deliv-ery state,supply quantity, weight, inspection item and other additional remark shall be noted.
3.2lf the buyer has any special or supplementary requirements out of this standard, the require-ments shall be agreed by both the buyer and the supplier.
4Manufacturing technique
4.1Smelting and casting
Unless otherwise specified, the smelting and casting methods shall be determined by the supplier.
4.2Repair welding
Unless otherwise specified, the repair welding for defects of casting can be made by the supplier.Therepair welding shall be in accordance with the requirements of GB/T 37400.7.The repair weldingprocess shall be determined by the supplier.When the depth of groove at important position of cast-2
