Heavy low alloy steel castings - Technical specification
1 Scope
This standard specifies the order requirements, manufacturing process, technical requirements, inspection rules, test methods, quality certificate, marking and packaging of general heavy low alloy steel castings (hereinafter referred to as castings).
This standard is applicable to the castings cast in a sand mould or poured in a mould with similar thermal conductivity.
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 222 Permissible tolerances for chemical composition of steel products
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 229 Metallic materials - Charpy pendulum impact test method
GB/T 231.1 Metallic materials - Brinell hardness test - Part 1: Test method
GB/T 4336 Carbon and low-alloy steel - Determination of multi-element contents - Spark discharge atomic emission spectrometric method (routine method)
GB/T 11352 Carbon steel castings for general engineering purpose
GB/T 15056 Casting surface roughness - Appraising method
GB/T 20066 Steel and iron - Sampling and preparation of samples for the determination of chemical composition
JB/T 5000.6 Heavy mechanical general techniques and standards - Part 6: Steel castings
JB/T 5000.7 Heavy mechanical general techniques and standards - Part 7: Repair welding for steel castings
JB/T 6397-2006 Specification for the heavy carbon structural steel forgings
3 Order requirements
3.1 The purchaser shall specify name, material designation, technical requirements, inspection items, delivery condition and supply quantity of the castings in the order contract.
3.2 The purchaser shall provide the order drawings and technical conditions agreed by the supplier and the purchaser.
3.3 Special requirements or other additional requirements proposed by the purchaser, if any, shall be agreed between both parties.
4 Manufacturing process
Foreword i
1 Scope
2 Normative references
3 Order requirements
4 Manufacturing process
4.1 Smelting
4.2 Casting
4.3 Heat treatment
4.4 Repair welding
4.5 Straightening
5 Technical requirements
5.1 Chemical composition
5.2 Mechanical properties
5.3 Non-destructive testing
5.4 Surface quality of castings
5.5 Shape and dimensional tolerance
6 Inspection rules and test methods
6.1 Chemical composition analysis
6.2 Mechanical property test
6.3 Non-destructive testing
6.4 Surface roughness
6.5 Retest
6.6 Re-heat treatment
7 Quality certificate
8 Marking and packaging
Table 1 Chemical composition
Table 2 Mechanical properties
Heavy low alloy steel castings - Technical specification
1 Scope
This standard specifies the order requirements, manufacturing process, technical requirements, inspection rules, test methods, quality certificate, marking and packaging of general heavy low alloy steel castings (hereinafter referred to as castings).
This standard is applicable to the castings cast in a sand mould or poured in a mould with similar thermal conductivity.
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 222 Permissible tolerances for chemical composition of steel products
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 229 Metallic materials - Charpy pendulum impact test method
GB/T 231.1 Metallic materials - Brinell hardness test - Part 1: Test method
GB/T 4336 Carbon and low-alloy steel - Determination of multi-element contents - Spark discharge atomic emission spectrometric method (routine method)
GB/T 11352 Carbon steel castings for general engineering purpose
GB/T 15056 Casting surface roughness - Appraising method
GB/T 20066 Steel and iron - Sampling and preparation of samples for the determination of chemical composition
JB/T 5000.6 Heavy mechanical general techniques and standards - Part 6: Steel castings
JB/T 5000.7 Heavy mechanical general techniques and standards - Part 7: Repair welding for steel castings
JB/T 6397-2006 Specification for the heavy carbon structural steel forgings
3 Order requirements
3.1 The purchaser shall specify name, material designation, technical requirements, inspection items, delivery condition and supply quantity of the castings in the order contract.
3.2 The purchaser shall provide the order drawings and technical conditions agreed by the supplier and the purchaser.
3.3 Special requirements or other additional requirements proposed by the purchaser, if any, shall be agreed between both parties.
4 Manufacturing process
Contents of JB/T 6402-2018
Foreword i
1 Scope
2 Normative references
3 Order requirements
4 Manufacturing process
4.1 Smelting
4.2 Casting
4.3 Heat treatment
4.4 Repair welding
4.5 Straightening
5 Technical requirements
5.1 Chemical composition
5.2 Mechanical properties
5.3 Non-destructive testing
5.4 Surface quality of castings
5.5 Shape and dimensional tolerance
6 Inspection rules and test methods
6.1 Chemical composition analysis
6.2 Mechanical property test
6.3 Non-destructive testing
6.4 Surface roughness
6.5 Retest
6.6 Re-heat treatment
7 Quality certificate
8 Marking and packaging
Table 1 Chemical composition
Table 2 Mechanical properties
