Standard No.:	TB/T 2942.1-2020
English Name:	Steel castings for rolling stock-Part 1:Technical requirements and inspection
Chinese Name:	机车车辆用铸钢件 第1部分：技术要求及检验
Professional Classification:	TB    Professional Standard - Railway Transport
Issued by:	NRA
Issued on:	2020-5-29
Implemented on:	2020-12-1
Status:	valid
Superseding:	TB/T 2942-2015 General Technical Specifications of Steel Castings for Rolling Stock TB/T 2451-1993 Metallographic Inspection for Non-metallic Inclusion in Cast Steel
Language:	English
File Format:	PDF
Word Count:	15000 words
Price(USD):	450.0
Delivery:	via email in 1 business day

Steel castings for rolling stock - Part 1: Technical requirements and inspection 1 Scope This part of TB/T 2942 specifies the terms and definitions, technical requirements, inspection methods and rules, recording, marking and quality certificate of steel castings for rolling stock. This part is applicable to the manufacturing and inspection of Grade A steel, Grade B steel, Grade B+ steel, Grade C steel, Grade D steel and Grade E steel castings (hereinafter referred to as low-alloy steel castings) for rolling stock and carbon steel castings for general engineering purpose (hereinafter referred to as carbon steel castings). 2 Normative references The following referenced documents are indispensable for the application of this document. For dated reference, only the edition cited applies. For undated references, the latest edition (including any amendments) applies. GB/T 223 Methods for chemical analysis of iron, steel and alloy GB/T 225 Steel - Hardenability test by end quenching (Jominy test) GB/T 228.1-2010 Metallic materials - Tensile testing - Part 1: Method of test at room temperature GB/T 229-2007 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 5117-2012 Covered electrodes for manual metal arc welding of non-alloy and fine grain steels GB/T 5482 Test method of metallic materials - Dynamic tear GB/T 5611 Foundry terminology GB/T 5678 Sampling methods of spectrochemical analysis for cast alloys GB/T 6414-2017 Castings - Dimensional tolerances and geometrical tolerances and machining allowances GB/T 6803 Test method for drop-weight test to determine nil-ductility transition temperature of ferritic steels GB/T 7232 Terminology of metal heat treatment GB/T 9444 Magnetic particle testing for steel castings GB/T 9448 Safety in welding and cutting GB/T 9452-2012 Testing method for working zone of heat treatment furnace GB/T 11351-2017 Mass tolerances for castings 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 GB/T 20123 Steel and iron - Determination of total carbon and sulfur content - Infrared absorption method after combustion in an induction furnace (routine method) GB/T 20125 Low-alloy steel - Determination of multi-element contents - Inductively coupled plasma atomic emission spectrometric method GB/T 32533-2016 Covered electrodes for manual metal arc welding of high-strength steels TB/T 2942.2 Steel castings for rolling stock - Metallographic atlas for metallographic microstructure examination 3 Terms and definitions For the purposes of this document, the terms and definitions given in GB/T 5611 and GB/T 7232 apply. 4 Technical requirements 4.1 General requirements The molten steel shall be melted by electric arc furnace and induction furnace. Unless otherwise specified, the supply state shall be as follows: a) Grade A steel castings shall be supplied in normalized or annealed state; b) Grade B and Grade B+ steel castings shall be supplied in normalized or normalized + tempered state; c) Grade C steel castings shall be supplied in normalized + tempered or quenched + tempered state; d) Grade D and E steel castings shall be supplied in quenched + tempered state; e) Generally, carbon steel castings are supplied in normalized or normalized + tempered state, or in a state determined through negotiation between the supplier and the purchaser. 4.2 Chemical composition 4.2.1 General requirements

Foreword i 1 Scope 2 Normative references 3 Terms and definitions 4 Technical requirements 5 Inspection methods and rules 6 Recording, marking and quality certificate Annex A (Informative) Reference index values for mechanical properties of low-alloy steel castings Annex B (Normative) Inspection of non-metallic inclusions in cast steel Annex C (Normative) Repair welding of defects in steel castings Annex D (Normative) Keel block Annex E (Normative) Tensile specimen of low-alloy steel castings