Detail of GB/T 1503-2008

Introduction of GB/T 1503-2008

Cast steel rolls 1 Scope This standard specifies the technical requirements, test methods, inspection rules, identification, packaging, quality certificates and method of ultrasonic inspection for cast steel rolls. This standard is applicable to cast steel rolls used in metal material processing and composite rolls (including roll collars) whose working layer is cast steel. As for cast steel rolls for other purposes, this standard may be used a reference. 2 Normative references The following documents contain provisions which, through reference in this text, constitute provisions of this standard. For dated references, subsequent amendments to (excluding any corrigendum), or revisions of, any of these publications do not apply. However, parties to agreements based on this standard are encouraged to investigate the possibility of applying the latest editions of the standards indicated below. For undated references, the latest edition of the document referred to applies. GB/T 145 Center holes (GB/T 145-2001, ISO 866:1975, IDT) GB/T 223.11 Methods for chemical analysis of iron, steel and alloy - The ammonium persulfate oxidation volumetric method for the determination of chromium content GB/T 223.13 Methods for chemical analysis of iron, steel and alloy - The ammonium ferrous sulfate titration method for the determination of vanadium content GB/T 223.20 Methods for chemical analysis of iron steel and alloy - The Potentiometric titration method for the determination of cobalt content GB/T 223.21 Methods for chemical analysis of iron steel and alloy - The 5-CL-PADAB spectrophotometric method for the determination of cobalt content GB/T 223.22 Methods for chemical analysis of iron, steel and alloy - The nitroso-R-salt spectrophotometric method for the determination of cobalt content GB/T 223.23 Methods for chemical analysis of iron, steel and alloy - The dimethylglyoxime spectrophotometric method for the determination of nickel content GB/T 223.25 Methods for chemical analysis of iron, steel and alloy - The dimethylglyoxime gravimetric method for the determination of nickel content GB/T 223.26 Methods for chemical analysis of iron steel and alloy - The thiocyanate direct photometric method for the Determination of molybderum content GB/T 223.28 Methods for chemical analysis of iron steel and alloy - The D-denzoinoxime gravimetric method for the determination of molybdenum content GB/T 223.38 Methods for chemical analysis of iron, steel and alloy - The anion-exchange separation-gravimetric method for the determination of niobium content GB/T 223.40 Iron steel and alloy - Determination of tungsten content - Gravimetryc method and spectrophotometric method GB/T 223.43 Methods for chemical analysis of iron, steel and alloy Determination of tungsten content GB/T 223.59 Methods for chemical analysis of iron, steel and alloy - The reduced molybdoantimonyl phosphoric acid photometric method for the determination of phosphorus content 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 223.62 Methods for chemical analysis of iron, steel and alloy - The butyl acetate extraction photometric method for the determination of phosphorus content GB/T 223.63 Methods for chemical analysis of iron, steel and alloy - The sodium(potassium)periodate photometric method for the determination of manganese content GB/T 223.64 Methods for chemical analysis of iron, steel and alloy - The flame atomic absorption spectrometric method for the determination of manganese content GB/T 223.65 Methods for chemical analysis of iron, steel and alloy - The flame atomic absorption spectrometric method for the determination of cobalt content GB/T 223.66 Methods for chemical analysis of iron, steel and alloy - The thiocyanate-chlorpromazine hydrochloride-chloroform extraction photometric method for the determination of tungsten content GB/T 223.67 Methods for chemical analysis of iron, steel and alloy - The reducing distillation-methylene blue photometric method for the determination of sulfur content GB/T 223.71 Methods for chemical analysis of iron, steel and alloy - The gravimetric method after combustion in the pipe furnace for the determination of carbon content GB/T 223.76 Methods for chemical analysis of iron, steel and alloy - The flame atomic absorption spectrometric method for the determination of vanadium content GB/T 228 Metallic materials - Tensile testing at ambient temperature (GB/T 228-2002,eqv ISO 6892:1998(E)) GB/T 1804 General tolerances - Tolerances for linear and angular dimensions without individual tolerance indications (GB/T 1804-2000,eqv ISO 2768-1:1989) GB/T 4336 Standard test method for spark discharge atomic emission spectrometric analysis of carbon and low-Alloy steel (routine method) GB/T 9445 Non-destructive testing - Qualification and certification of personnel (GB/T 9445-2008, ISO 9712:2005, IDT) GB/T 12604.1 Non-destructive testing - Terminology - Terms used in ultrasonic testing (GB/T 12604.1-2005, ISO 5577:2000, IDT) GB/T 13313 Methods of shore and leeb hardness testing for rolls JB/T 10061 Commonly used specification for A-mode ultrasonic flaw detector using pulse echo technique (JB/T 10061-1999, eqv ASTM E 750-80) JB/T 10062 Testing methods for performance of probes used in ultrasonic flaw detection 3 Technical requirements 3.1 According to the purpose of rolls and the order drawings confirmed by the supplier and the buyer, they are manufactured according to this standard. Technical requirements other than this standard are determined through consultation between the supplier and the buyer. 3.2 Chemical composition and surface hardness shall be as specified in Table 1. 3.3 Uniformity of surface hardness of roll body: as for work roll for board belted steel, it is no greater than 4HSD, for roll for other purposes, it is no greater than 5HSD. 3.4 The thickness of the outer layer of the composite roll shall be 5 mm greater than that of the working layer. 3.5 The tensile strength shall meet the requirements of the contract, which may be executed with reference to Annex A. 3.6 Surface quality 3.6.1 There shall be no visually visible manufacturing defects on the working face of roll body. Manufacturing defects (in other positions) that do not affect the use shall be repaired to meet the drawing requirements confirmed by the parties. 3.6.2 Flat-roll-delivered rolls, if their defects are in the pass positions and can be removed, may be delivered after negotiation by the supplier and the buyer. 3.7 Machining 3.7.1 It shall meet the requirements of roll order drawing confirmed by the supplier and the buyer. 3.7.2 Center hole: If the diameter of roller body is less than 550 mm, the center hole is recommended to be 60°Type B , which is executed according to GB/T 145; for rolls with other specifications, the center hole is recommended to be 75° Type B, which shall be executed as specified in Figure 1 and Table 2. 3.7.3 Table 3 is recommended for dimensional tolerance off roll body diameter, and geometric tolerance and surface roughness of roll body. If the machining accuracy is not noted in the drawing, the total length of the roll shall be Grade c in GB/T 1804, and that of the rest shall be Grade m.

Contents of GB/T 1503-2008

Foreword i 1 Scope 2 Normative references 3 Technical requirements 4 Test method 5 Inspection rules 6 Packaging, marking and quality certificate Annex A (Informative) Comparison of material code, steel grade and mechanical properties Annex B (Normative) Ultrasonic testing method for cast steel rolls