This standard specifies the material designation, technical requirements, test methods, inspection rules, marking, packaging, storage and transportation, etc. of low alloy steel castings for general engineering (excluding the high temperature pressure-bearing, corrosion resistant and wear resistant material) and structural purposes.
This standard is applicable to low alloy steel castings for general engineering and structural purposes.
2 Normative References
The following documents for the application of this document are essential. Any dated reference, just dated edition applies to this document. For undated references, the latest edition (including any amendments) applies to this document.
GB/T 222 Permissible Tolerances for Chemical Composition of Steel Products
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 223.68 Methods for Chemical Analysis of Iron, Steel and Alloy - The Potassium Iodate Titration Method after Combustion in the Pipe Furnace for the Determination of Sulfur Content
GB/T 223.69 Iron Steel and Alloy - Determination of Carbon Contents - Gas-Volumetric Method after Combustion in the Pipe Furnace
GB/T 228.1 Metallic Material - Tensile Test - Part 1: Method of Test at Room Temperature
GB/T 229 Metallic Materials - Charpy Pendulum Impact Test Method
GB/T 230.1 Metallic Materials - Rockwell Hardness Test - Part 1: Test method (Scales A, B, C, D, E, F, G, H, K, N, T)
GB/T 231.1 Metallic Materials - Brinell Hardness Test - Part 1: Test Method
GB/T 4336 Standard Test Method for Spark Discharge Atomic Emission Spectrometric Analysis of Carbon and Low-alloy Steel (Routine Method)
GB/T 4338 Metallic Materials - Tensile Testing at Elevated Temperature
GB/T 5613 Code for Representing Cast Steels
GB/T 5677 Radiographic Testing for Steel Castings
GB/T 5678 Sampling Methods of Spectrochemical Analysis for Cast Alloys
GB/T 6060.1 Roughness Comparison Specimens Cast Surfaces
GB/T 6414 Castings - System of Dimensional Tolerances and Machining Allowances
GB/T 7233.1 Steel Castings - Ultrasonic Examination - Part 1: Steel Castings for General Purposes
GB/T 9443 Penetrant Testing for Steel Castings
GB/T 9444 Magnetic Particle Testing for Steel Castings
GB/T 11351 Mass Tolerances for Castings
GB/T 16923 Normalizing and Annealing of Steel Parts
GB/T 16924 Quenching and Tempering of Steel Parts
GB/T 20066 Steel and Iron-Sampling and Preparation of Samples for the Determination of Chemical Composition
3 Material Designation
Material designations of low alloy cast steel include 10 types and according to those specified in GB/T 5613, they may be classified into: ZGD270-480, ZGD290-510, ZGD345-570, ZGD410-620, ZGD535-720, ZGD650-830, ZGD730-910, ZGD840-1030, ZGD1030-1240 and ZGD1240-1450.
4 Technical Requirements
4.1 Chemical composition
4.1.1 The sulfur and phosphorus contents in chemical compositions of each material designation shall meet the requirements specified in Table 1. If there are requirements, chemical composition analysis for finished products may be conducted, and the analysis results for chemical composition of finished castings shall meet the requirements specified in Table 1, and deviations specified in GB/T 222 are allowed.
