1 Scope
This standard specifies the order requirements, manufacturing process, technical requirements, inspection rules, test methods, acceptance, quality certificate, marking and packaging etc. of alloy structural steel forgings.
This standard applies to the order, manufacturing and inspection of heavy alloy structural steel forgings for general use.
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 of the referenced document (including any amendments) applies.
GB/T 223 (all parts) Methods for chemical analysis of iron, steel and alloy
GB/T 228.1 Metallic materials - Tensile testing - Part 1: Method of test at room temperature (GB/T 228.1-2010, ISO 6892-1:2009, MOD)
GB/T 229 Metallic materials - Charpy pendulum impact test method (GB/T 229-2007, ISO 148-1:2006, MOD)
GB/T 231.1 Metallic materials - Brinell hardness test - Part 1: Test method (GB/T 231.1-2009, ISO 6506-1:2005, MOD)
3 Order requirements
3.1 The purchaser shall specify the name, grade, material designation, delivery state, and supply quantity of forgings in the order contract.
3.2 The purchaser shall provide the order drawing.
3.3 When the purchaser has additional requirement, it shall be agreed between both parties.
4 Manufacturing process
4.1 Smelting
Steel used for forgings shall be smelted in basic electric furnace. As agreed by the purchaser, other smelting method ensuring the quality may also be adopted.
Foreword II
1 Scope
2 Normative references
3 Order requirements
4 Manufacturing process
4.1 Smelting
4.2 Forging
4.3 Heat treatment
4.4 Machining
4.5 Defect removal and repair welding
5 Technical requirements
5.1 Chemical compositions
5.2 Mechanical properties
5.3 Hardness
5.4 Non-destructive testing
6 Inspection rules and test methods
6.1 Chemical composition analysis
6.2 Mechanical property tests
6.3 Hardness inspection
6.4 Retest
6.5 Re-heat treatment
7 Acceptance and quality certificate
8 Marking and packaging
Table 1 Chemical composition
Table 2 Allowable deviations for chemical compositions of finished products
Table 3 Mechanical properties
Table 4 Grades and inspection items
Figure 1 Sampling positions of solid axle, square and rectangular forgings
Figure 2 Sampling positions of hollow forgings
Figure 3 Sampling positions of disk forgings
Figure 4 Sampling positions of ring forgings
1 Scope
This standard specifies the order requirements, manufacturing process, technical requirements, inspection rules, test methods, acceptance, quality certificate, marking and packaging etc. of alloy structural steel forgings.
This standard applies to the order, manufacturing and inspection of heavy alloy structural steel forgings for general use.
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 of the referenced document (including any amendments) applies.
GB/T 223 (all parts) Methods for chemical analysis of iron, steel and alloy
GB/T 228.1 Metallic materials - Tensile testing - Part 1: Method of test at room temperature (GB/T 228.1-2010, ISO 6892-1:2009, MOD)
GB/T 229 Metallic materials - Charpy pendulum impact test method (GB/T 229-2007, ISO 148-1:2006, MOD)
GB/T 231.1 Metallic materials - Brinell hardness test - Part 1: Test method (GB/T 231.1-2009, ISO 6506-1:2005, MOD)
3 Order requirements
3.1 The purchaser shall specify the name, grade, material designation, delivery state, and supply quantity of forgings in the order contract.
3.2 The purchaser shall provide the order drawing.
3.3 When the purchaser has additional requirement, it shall be agreed between both parties.
4 Manufacturing process
4.1 Smelting
Steel used for forgings shall be smelted in basic electric furnace. As agreed by the purchaser, other smelting method ensuring the quality may also be adopted.
Contents of GB/T 33084-2016
Foreword II
1 Scope
2 Normative references
3 Order requirements
4 Manufacturing process
4.1 Smelting
4.2 Forging
4.3 Heat treatment
4.4 Machining
4.5 Defect removal and repair welding
5 Technical requirements
5.1 Chemical compositions
5.2 Mechanical properties
5.3 Hardness
5.4 Non-destructive testing
6 Inspection rules and test methods
6.1 Chemical composition analysis
6.2 Mechanical property tests
6.3 Hardness inspection
6.4 Retest
6.5 Re-heat treatment
7 Acceptance and quality certificate
8 Marking and packaging
Table 1 Chemical composition
Table 2 Allowable deviations for chemical compositions of finished products
Table 3 Mechanical properties
Table 4 Grades and inspection items
Figure 1 Sampling positions of solid axle, square and rectangular forgings
Figure 2 Sampling positions of hollow forgings
Figure 3 Sampling positions of disk forgings
Figure 4 Sampling positions of ring forgings