GB/T 1298-2008Carbon tool steels (English PDF)

Foreword

This standard ASTM A686-92 "carbon tool steel standard" non-equivalent.

This standard replaces GB/T 1298-1986 "carbon tool steel technical conditions" and GB/T 227-1991 "tool steel hardenability test side law".

This standard compared with GB/T 1298-1986, the main changes are as follows.

--- Standard name change. carbon tool steel;

--- Added "rod" and the relevant technical requirements;

--- Increasing the "order content";

--- Increase in tungsten, molybdenum, vanadium content (mass fraction) of the provisions of the residual elements, and the residual copper content (mass fraction) decreased from 0.30% to 0.25%;

--- Changed to "smelting method" requirement;

--- Amend the provisions of the delivery status of cold-drawn steel;

--- Cancel "fracture test";

--- Increasing the acid leaching low magnification level requirements, and as will be seized;

--- Original GB/T 227-1991 "tool steel hardenability test methods" used in the present standard Appendix B.

The Standard Appendix A and Appendix B are normative.

The standard proposed by China Iron and Steel Association.

This standard is under the jurisdiction of the National Steel Standardization Technical Committee.

This standard was drafted. Tung Wah Group of Chongqing Special Steel Co., Dongbei Special Steel Group (Dalian), Metallurgical Industry Information Standards Institute Study hospital.

1 Scope

This standard specifies the classification of carbon tool steel, ordering the content, size, shape and tolerances, technical requirements, test methods, inspection regulations Then, packaging, marking and quality certificate.

This standard applies to hot-rolled carbon tool steel, forged, cold drawn bright steel and silver steel and wire rod, its chemical composition is also applicable to an ingot, billet and Products.

2 Normative references

The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard.

GB/T 222 chemical composition of finished steel tolerance Determination of chromium content GB/T 223.11 Methods for chemical analysis of iron, steel and alloy The ammonium persulfate oxidation volumetric method GB/T 223.12 Methods for chemical analysis of iron, steel and alloys of sodium carbonate separation - diphenyl spectrophotometric determination of chromium content GB/T 223.14 Methods for chemical analysis of iron, steel and alloys, tantalum reagent extraction and spectrophotometric determination of vanadium content GB/T 223.18 Methods for chemical analysis of iron, steel and alloy The sodium thiosulfate separation - determination of copper content Iodometry GB/T 223.19 Methods for chemical analysis of iron, steel and alloy neocuproine - chloroform extraction spectrophotometric determination of copper content GB/T 223.23 steel and alloy - Determination of nickel content dimethylglyoxime spectrophotometry GB/T 223.26 steel and alloy - Determination of molybdenum content - Thiocyanate spectrophotometric GB/T 223.43 steel and alloy of tungsten content - Gravimetric method and spectrophotometry GB/T 223.58 Methods for chemical analysis of iron, steel and alloys of sodium arsenite - sodium nitrite determination of manganese content titration GB/T 223.59 Methods for chemical analysis of iron, steel and alloy antimony phosphomolybdate blue spectrophotometric determination of phosphorus content GB/T 223.60 Methods for chemical analysis of iron, steel and alloy perchloric acid dehydration gravimetric method for the determination of silicon content Determination of phosphorus content GB/T 223.61 Methods for chemical analysis of iron, steel and alloy The ammonium phosphomolybdate volumetric method GB/T 223.62 Methods for chemical analysis of iron, steel and alloy butyl acetate extraction spectrophotometric determination of phosphorus content GB/T 223.63 Methods for chemical analysis of iron, steel and alloy The sodium (potassium) for Determination of amount Determination of sulfur content of potassium iodate titration method after GB/T 223.68 Methods for chemical analysis of iron, steel and alloy tube furnace combustion GB/T 223.69 after carbon and alloy steel - Determination of the pipe furnace combustion gas volumetric method After the determination of carbon content - Gravimetric method GB/T 223.71 Methods for chemical analysis of iron, steel and alloy tube furnace combustion GB/T 223.72 steel and alloy sulfur content - Gravimetric method Determination of GB/T 223.74 Methods for chemical analysis of iron, steel and alloy non-combined carbon content GB/T 223.76 Methods for chemical analysis of iron, steel and alloys by flame atomic absorption spectrometry of vanadium content Determination of depth of decarburization GB/T 224 steel GB/T 226 steel macrostructure and defect etching test method GB/T 230.1 Metallic Rockwell hardness test - Part 1. Test methods (A, B, C, D, E, F, G, H, K, N, T scale) (GB/T 230.1-2004, ISO 6508-1:1999, MOD) GB/T 231.1 Brinell hardness test - Part 1. Test methods GB/T 702 rolled round and square steel size, shape, weight and tolerances (GB/T 702-2004, ISO 1035-1. 1980