1 Scope
This standard specifies technical requirements, inspection methods, inspection rules, marking and quality certificate and records for Grade B steel (ZG25MnNi), Grade B+ steel (ZG25MnCrNi) and Grade C steel (ZG25MnCrNiMo) bolsters and side frames for railway freight car.
This standard is applicable to the manufacture and inspection of Grades B, B+ and C steel bolster and side frame for railway freight car.
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 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 6394 Metal-methods for Estimating the Average Grain Size
GB/T 6414-1999 Castings - System of Dimensional Tolerances and Machining Allowances (eqv ISO 8062: 1994)
GB/T 15056 Evaluation Method on Cast Surface Roughness
JB/T 5105 Casting Form Pattern Draft
TB/T 1959 Static Load and Fatigue Test of Bolster and Side Frame for Railway Freight Car
TB/T 2451 Metallographic Inspection for Non-metallic Inclusion in Cast Steel
TB/T 2942 General Technical Specifications of Steel Castings for Rolling Stock
TB/T 3105.1 Nondestructive Testing of Cast Steel Bolster and Side Frame for Railway Freight Car - Part 1: Radiographic Testing
TB/T 3105.3 Nondestructive Testing of Cast Steel Bolsters and Side Frames for Railway Freight Car - Part 3: Magnetic Particle Testing
TB/T 3105.4-2014 Nondestructive Testing of Cast Steel Bolsters and Side Frames for Railway Freight Car - Part 4: Digital Radiography and Industrial Computed Tomography Testing
TB/T 3211 Imperfections of Radiographic Testing for Steel Castings for Rolling Stock
TB/T 3212.1 Metallographic Atlas for Metallographic Microstructure Examination of Low Alloy Cast Steel for Rolling Stock - Part 1: Grades B and B+ Cast Steel
TB/T 3212.2 Metallographic Atlas for Metallographic Microstructure Examination of Low Alloy Cast Steel for Rolling Stock - Part 2: Grades C Cast Steel
3 Technical Requirements
3.1 General requirements
3.1.1 The bolster and side frame shall be in accordance with this standard as well as those specified in the technical documents and product drawings approved via established procedures.
3.1.2 The two important parts, i.e., A and B, shall be determined according to the stress state of the bolster and side frame and then specified in the product drawing. See Annex A for the division of Parts A and B of bolster and side frame.
3.2 Chemical composition
The chemical composition of the steel shall be in accordance with those specified in Table 1.
Foreword i
1 Scope
2 Normative References
3 Technical Requirements
4 Inspection Method
5 Inspection Rules
6 Marking and Quality Certificate
7 Record
Annex A (Normative) Partitioning Methods for Part A and Part B of Bolsters and Side Frames
Annex B (Normative) Bolster and Side Frame Compactness Standard Picture
Annex C (Normative) Radiography Qualification Grades for Part A and Part B of Bolster and Side Frame
Annex D (Normative) Measuring Basis of Bolster and Side Frame
Annex E (Normative) Bolster and Side Frame Compactness Inspection and Dissection Positions
Annex F (Normative) Location of Thickness Measuring Points for Important Parts of Bolster and Side Frame
1 Scope
This standard specifies technical requirements, inspection methods, inspection rules, marking and quality certificate and records for Grade B steel (ZG25MnNi), Grade B+ steel (ZG25MnCrNi) and Grade C steel (ZG25MnCrNiMo) bolsters and side frames for railway freight car.
This standard is applicable to the manufacture and inspection of Grades B, B+ and C steel bolster and side frame for railway freight car.
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 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 6394 Metal-methods for Estimating the Average Grain Size
GB/T 6414-1999 Castings - System of Dimensional Tolerances and Machining Allowances (eqv ISO 8062: 1994)
GB/T 15056 Evaluation Method on Cast Surface Roughness
JB/T 5105 Casting Form Pattern Draft
TB/T 1959 Static Load and Fatigue Test of Bolster and Side Frame for Railway Freight Car
TB/T 2451 Metallographic Inspection for Non-metallic Inclusion in Cast Steel
TB/T 2942 General Technical Specifications of Steel Castings for Rolling Stock
TB/T 3105.1 Nondestructive Testing of Cast Steel Bolster and Side Frame for Railway Freight Car - Part 1: Radiographic Testing
TB/T 3105.3 Nondestructive Testing of Cast Steel Bolsters and Side Frames for Railway Freight Car - Part 3: Magnetic Particle Testing
TB/T 3105.4-2014 Nondestructive Testing of Cast Steel Bolsters and Side Frames for Railway Freight Car - Part 4: Digital Radiography and Industrial Computed Tomography Testing
TB/T 3211 Imperfections of Radiographic Testing for Steel Castings for Rolling Stock
TB/T 3212.1 Metallographic Atlas for Metallographic Microstructure Examination of Low Alloy Cast Steel for Rolling Stock - Part 1: Grades B and B+ Cast Steel
TB/T 3212.2 Metallographic Atlas for Metallographic Microstructure Examination of Low Alloy Cast Steel for Rolling Stock - Part 2: Grades C Cast Steel
3 Technical Requirements
3.1 General requirements
3.1.1 The bolster and side frame shall be in accordance with this standard as well as those specified in the technical documents and product drawings approved via established procedures.
3.1.2 The two important parts, i.e., A and B, shall be determined according to the stress state of the bolster and side frame and then specified in the product drawing. See Annex A for the division of Parts A and B of bolster and side frame.
3.2 Chemical composition
The chemical composition of the steel shall be in accordance with those specified in Table 1.
Contents of TB/T 3012-2016
Foreword i
1 Scope
2 Normative References
3 Technical Requirements
4 Inspection Method
5 Inspection Rules
6 Marking and Quality Certificate
7 Record
Annex A (Normative) Partitioning Methods for Part A and Part B of Bolsters and Side Frames
Annex B (Normative) Bolster and Side Frame Compactness Standard Picture
Annex C (Normative) Radiography Qualification Grades for Part A and Part B of Bolster and Side Frame
Annex D (Normative) Measuring Basis of Bolster and Side Frame
Annex E (Normative) Bolster and Side Frame Compactness Inspection and Dissection Positions
Annex F (Normative) Location of Thickness Measuring Points for Important Parts of Bolster and Side Frame
