Steel die forgings — General specification
1 Scope
This standard specifies the classification, technical requirements, test methods, inspection rules, marking, quality certificate, packaging and transportation for steel die forgings (hereinafter referred to as "forgings").
This standard is applicable to structural steel die forgings produced by forging and pressing equipment such as die forging hammer, hot die forging press, screw press and horizontal forging machine. Forgings of other steel grades may also be used for reference.
This standard serves as the basis for product design department to determine forging technical requirements and sign technical agreements between the supplier and the purchaser, and may also be used as the basis for forging acceptance.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition (including any amendments) applies.
GB/T 224 Determination of the depth of decarburization of steels
GB/T 226 Test method for macrostructure and defect of steel by etching
GB/T 228.1 Metallic materials — Tensile testing — Part 1: Method of test at room temperature
GB/T 229 Metallic materials — Charpy pendulum impact test method
GB/T 230 (all parts) Metallic materials — Rockwell hardness test
GB/T 231 (all parts) Metallic materials — Brinell hardness test
GB/T 321 Preferred numbers — Series of preferred numbers
GB/T 699 Quality carbon structure steels
GB/T 700 Carbon structural steels
GB/T 2828 (all parts) Sampling procedures for inspection by attributes
GB/T 2829 Sampling procedures and tables for periodic inspection by attributes (Apply to inspection of process stability)
GB/T 3077 Alloy structure steels
GB/T 5216 Structural steels with specified hardenability bands
GB/T 6394 Determination of estimating the average grain size of metal
GB/T 7232 Terminology of metal heat treatment
GB/T 12362 Tolerances and machining — Allowances of steel die forging
GB/T 12363 Classification of forging functions
3 Terms and definitions
For the purposes of this standard, the following terms and definitions apply.
3.1
steel-smelting furnace number
furnace number marked on steel products delivered by a steel mill
3.2
Heat treatment furnace number
same forging that is treated once or continuously with the same process specification in the same heat treatment furnace
3.3
manufacture batch
according to the same process specification, all forgings continuously produced in the forging process
4 Classification of forgings
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Classification of forgings
5 Technical requirements
6 Test methods
7 Inspection rules
8 Marking, quality certificate, packaging and transportation
Annex A (Normative) Draft angle and fillet radius of forgings
Steel die forgings — General specification
1 Scope
This standard specifies the classification, technical requirements, test methods, inspection rules, marking, quality certificate, packaging and transportation for steel die forgings (hereinafter referred to as "forgings").
This standard is applicable to structural steel die forgings produced by forging and pressing equipment such as die forging hammer, hot die forging press, screw press and horizontal forging machine. Forgings of other steel grades may also be used for reference.
This standard serves as the basis for product design department to determine forging technical requirements and sign technical agreements between the supplier and the purchaser, and may also be used as the basis for forging acceptance.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition (including any amendments) applies.
GB/T 224 Determination of the depth of decarburization of steels
GB/T 226 Test method for macrostructure and defect of steel by etching
GB/T 228.1 Metallic materials — Tensile testing — Part 1: Method of test at room temperature
GB/T 229 Metallic materials — Charpy pendulum impact test method
GB/T 230 (all parts) Metallic materials — Rockwell hardness test
GB/T 231 (all parts) Metallic materials — Brinell hardness test
GB/T 321 Preferred numbers — Series of preferred numbers
GB/T 699 Quality carbon structure steels
GB/T 700 Carbon structural steels
GB/T 2828 (all parts) Sampling procedures for inspection by attributes
GB/T 2829 Sampling procedures and tables for periodic inspection by attributes (Apply to inspection of process stability)
GB/T 3077 Alloy structure steels
GB/T 5216 Structural steels with specified hardenability bands
GB/T 6394 Determination of estimating the average grain size of metal
GB/T 7232 Terminology of metal heat treatment
GB/T 12362 Tolerances and machining — Allowances of steel die forging
GB/T 12363 Classification of forging functions
3 Terms and definitions
For the purposes of this standard, the following terms and definitions apply.
3.1
steel-smelting furnace number
furnace number marked on steel products delivered by a steel mill
3.2
Heat treatment furnace number
same forging that is treated once or continuously with the same process specification in the same heat treatment furnace
3.3
manufacture batch
according to the same process specification, all forgings continuously produced in the forging process
4 Classification of forgings
Contents of GB/T 12361-2016
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Classification of forgings
5 Technical requirements
6 Test methods
7 Inspection rules
8 Marking, quality certificate, packaging and transportation
Annex A (Normative) Draft angle and fillet radius of forgings
