1 Scope
This standard specifies the trademark, technical requirement, test methods, test rules, marking, packaging, storage and transport of carbon steel castings for general engineering purpose.
This standard is applicable to carbon steel castings for general engineering purpose.
2 Normative references
The following normative documents contain provision which, through reference in this text, constitute provisions of this standard. For dated reference, the subsequent amendments to (excluding the correction contents) or revisions of any of these publications do not apply to this standard. However, parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. For undated references, the latest edition of the normative document referred to applies.
GB/T 222 Permissible Tolerances for Chemical Composition of Steel Produts
GB/T 223.3 Methods for Chemical Analysis of Iron, Steel and Alloy - The Diantipyrylmethane Phosphomolybdate Gravimetric Method for the Determination of Phosphorus Content
GB/T 223.4 Alloyed steel - Determination of Manganese Content - Potentiometric or Visual Titration Method
GB/T 223. 60 Methods for Chemical Analysis of Iron, Steel and Alloy - The Perchloric Acid Dehydration Gravimetric Method for the Determination of Silicon Content
GB/T 228 Metallic materials - Tensile Testing at Ambient Temperature (GB/T 228—2002, eqv ISO 6892:1998)
GB/T 229 Metallic materials - Charpy Pendulum Impact Test Method (GB/T 229—2007,ISO 148-1 : 2006,MOD)
GB/T 231.1 Metallic Brinell Hardness Test - Part 1: Test Methods (GB/T 231. 1—2002,eqv ISO 6506-1: 1999)
GB/T 231. 2 Metallic Brinell Hardness Test - Part 2: Verification and Calibration of Hardness Testers (GB/T 231. 2—2002, ISO 6506-2:1999,MOD)
GB/T 231. 3 Metalic Brinell Hardness Test - Part 3: Calibration of Hardness Reference Blocks (GB/T 231. 3—2002,ISO 6506-3:1999, MOD)
GB/T 4336 Standard Test Method for Spark Discharge Atomic Emission Spectrometric Analysis of Carbon and Low-alloy Steel (Routine Method)
GB/T 5613 Code for Representing Cast Steels
GB/T 5677 Radiographic Testing for Steel Castings radiogram (GB/T 5677—2007,ISO 4993: 1987,IDT)
GB/T 6414 Castings - System of Dimensional Tolerances and Machining Allowances (GB/T 6414—1999,eqv ISO 8062:1994)
GB/T 7233 Methods for Ultrasonic Testing and for Specifying Quality Levels of Steel Castings
GB/T 8170 Rules of Rounding Off for Numerical Values & Expression and Judgement of limiting values
GB/T 9443 Penetrant Testing for Steel Castings (GB/T 9443—2007,ISO 4987: 1992,IDT)
GB/T 9444 Magnetic Particle Testing for Steel Castings (GB/T 9444—2007,ISO 4986: 1992,IDT)
GB/T 11351 Mass Tolerances for Castings
GB/T 15056 Evaluation Method on Cast Surface Roughness
GB/T 16923 Normalizing and Annealing of Steel Parts
GB/T 16924 Quenching and Tempering of Steel Parts
3 Trademark
Trademark of the carbon steel castings for general engineering purpose (hereafter referred to castings as simply) specified in GB/T 5613 comprises: ZG 200-400, ZG 230-450, ZG 270-500, ZG 310-570, ZG 340-640
4 Technical requirements
4.1 Production
Unless otherwise stated herein, the Supplier shall determine steel-making method and casting technology by itself.
4.2 Chemical compositions
Chemical composition of each trademark shall be in accordance with provisions in Table 1 and Table 2.
