GB/T 8732-2014Steels of blade for steam turbine (English PDF)

1 Scope

This Standard specifies the ordering details, dimensions, shape and permissible deviations, technical requirements, test methods, inspection rules, packaging, marks and quality certificate for steels of blade for steam turbine.

This Standard applies to hot-rolled and forged steel for turbine blades.

2 Normative references

The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.

GB/T 222-2006, Permissible Tolerances for Chemical Composition of Steel Products

GB/T 223.3, Methods for chemical analysis of iron, steel and alloy -- The diantipyryl methane phosphomolybdate gravimetric method for the determination of phosphorus content

GB/T 223.11, Iron, steel and alloy -- Determination of chromium content -- Titrimetric method and spectrophotometric method

GB/T 223.13, Iron, steel and alloy -- Determination of vanadium content -- Titrimetric method and spectrophotometric method

GB/T 223.14, Methods for Chemical Analysis of Iron, Steel and Alloy -- The N- Benzoy-N-Phenylhydroxylamine Extraction Photometric Method for the Determination of Vanadium Content

GB/T 223.16, Methods for Chemical Analysis of Iron, Steel and Alloy -- The Chromotropic Acid Photometric Method for the Determination of Titaninm Content

GB/T 223.17, Methods for chemical analysis of iron, steel and alloy -- The diantipyryl methane photometric method for the determination of titanium content

GB/T 223.18, Methods for chemical analysis of iron, steel and alloy -- The sodium thiosulfate separation iodimetric method for the determination of copper content

GB/T 223.19, Methods for chemical analysis of iron, steel and alloy -- The GB/T 6394, Metal -- Methods for estimating the average grain size

GB/T 10561-2005, Steel -- Determination of Content of Nonmetallic Inclusions -- Micrographic Method Using Standards Diagrams

GB/T 11170, Stainless steel -- Determination of multi-element contents -- Spark discharge atomic emission spectrometric method (Routine method)

GB/T 14203, General rules for spark discharge atomic emission spectrometry

GB/T 15711, Inspection of non-metallic inclusions of steel -- Etching test method of tower specimens

GB/T 17505, Steel and steel products -- General technical delivery requirements

GB/T 20066, Steel and Iron -- Sampling and Preparation of Specimens 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 20124, Steel and iron -- Determination of nitrogen content -- Thermal conductimetric method after fusion in a current of inert gas

GB/T 20878, Stainless steels -- Designation and chemical composition

YB/T 4402, Micrographic method for determining content of delta-ferrite in martensitic stainless steel

3 Ordering details

The contracts or orders placed in accordance with this Standard shall include the following.

a) Standard number;

b) Product name;

c) Designation;

d) Specification or model (see Chapter 4);

e) Weight and/or quantity;

f) Processing purpose;

g) Delivery condition;

h) Items or specifications to be negotiated by both parties and specified in the contract;

i) Special requirements (see 5.13).

4 Dimensions, shape and permissible deviations

4.4 According to the purchaser's requirements, and after consultation between both parties and as specified in the contract, steel with special dimensional and precision requirements can be supplied.

5 Technical requirements