GB/T 36027-2018Austenitic stainless steel bars for nuclear power plants (English PDF)

1 Scope

This Standard specifies the ordering content, dimensions, shape, weight and allowable deviation, technical requirements, test methods, inspection rules, packaging, marking and quality certificate of austenitic stainless steel bars for main equipment of nuclear power plants.

This Standard applies to hot-rolled and forged austenitic stainless steel bars with a diameter of 10 mm~260 mm for use in level 1, 2 and 3 equipment in nuclear power plants.

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 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 223.5, Steel and iron -- Determination of acid-soluble silicon and total silicon content -- Reduced molybdosilicate spectrophotometric method

GB/T 223.11, Iron, steel and alloy -- Determination of chromium content -- Visual titration or potentiometric titration method

GB/T 223.16, Methods for chemical analysis of iron, steel and alloy. The chromotropic acid photometric method for the determination of titanium content

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

GB/T 223.19, Methods for chemical analysis of iron, steel and alloy. The neocuproine-chloroform extraction photometric method for the determination of copper 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 223.25, Methods for chemical analysis of iron, steel and alloy. The […]

4 Dimensions, shape, weight

4.1 The diameter range of steel bars is: 10 mm~260 mm.

4.2 The dimensions, shape and allowable deviations of hot-rolled steel bars shall comply with the requirements of Group 2 in GB/T 702-2017.

4.3 The dimensions, shape and allowable deviations of forged steel bars shall comply with the requirements of Group 2 in GB/T 908-2008.

4.4 Steel bars with other sizes and allowable deviations may also be provided upon negotiation between the supplier and the purchaser and specified in the contract.

4.5 Steel bars are delivered according to actual weight.

5 Technical requirements

7 Inspection rules

7.4.3 Except for tensile and impact tests, the reinspection and judgment rules for other items shall comply with the provisions of GB/T 17505.

7.4.4 If a product is rejected due to unsatisfactory results of one or more mechanical property tests, reheat treatment is allowed. Retest all items except chemical composition according to the provisions of this Standard. The conditions of reheat treatment shall be included in the test report. Reheat treatment shall not exceed once.

8 Packaging, marking and quality certificate

8.1 The packaging and marking of steel bars shall comply with the relevant provisions of GB/T 2101.

8.2 When the steel bars leave the factory, they shall be accompanied by a quality certificate and a test report (or record) signed by the supplier's inspection department. The record and test report shall at least include:

- Composition list for smelting analysis and composition list for finished product analysis;

- Heat treatment records (in case of re-heat treatment, all heat treatment records are included);

- Mechanical properties test report (tensile, impact);

- Intergranular corrosion test report;

- Grain size inspection report (if any);

- alpha-phase inspection report (if any);

- Non-metallic inclusion inspection report (if any);

- Macrostructure inspection report (if any);

- Ultrasonic inspection report;

- Penetrating inspection report (if any);

- Dimension inspection sheet;

- Surface quality inspection report; […]