GB/T 6967-2009Martensitic stainless steel castings for general engineering application (English PDF)

Foreword

This standard is modified in relation to ISO 11972.1998 "Corrosion-resistant cast

steels for general applications" and ISO 4990.2003 "Steel castings - General

technical delivery requirements"; and it refers to the partial provisions of foreign

standards such as DIN EN 10293.2005 "Steel castings for general engineering uses".

This standard is modified in relation to the combination of ISO 3755.1991 and ISO

4990.2003; the differences on main technical contents are as follows.

- The biggish editorial changes were done on structure; Chapter 6 and 7 in ISO

11972,1998 were modified; the heat treatment process was changed to be

determined by supplier in Chapter 6; the supplementary requirements in Chapter

7 was modified as the Chapter 3 in this standard. Table 1 - Permissible deviations

of check analysis with respect to the specified composition range and the Table 2

- Alternative material designation identification in ISO 4990.2003 were deleted;

the mechanical property test block specification, sampling position and dimension

in Appendix 8 were modified. This standard replaces GB/T 6967 - 1986 "Medium

and high strength stainless steel castings for engineering structure purposes";

being compared to GB/T 6967-1986, the main technical content revisions are as

follows.

- Two Ultra-low carbon high strength stainless steel cast brand ZG04Crl3Ni4Mo

and ZG04Crl3Ni5Mo were increased; ZG06Crl3Ni6Mo was deleted.

- Low temperature impact absorbing energy and cold bent performance

requirements were added;

- The Purity degree requirements for molten steel were added;

- High strength and high tenacity stainless steel cast designations that adopt

refining process were added.

This standard shall be under the jurisdiction of and proposed by the National

Technical Committee on Foundry of Standardization Administration of China.

Drafting organizations of this standard. Shenyang Research Institute of Foundry and

KOCEL GROUP Co., Ltd.

Participating drafting organizations of this standard. Dongfang Electric Machinery Co.,

Ltd., China First Heavy Industries Tianjin R&D Center, China National Erzhong Group

Company and Harbin electric machinery Co., Ltd. (HEC).

Chief drafting staffs of this standard. Lou Yanchun, Zhang Zhongqiu, Hao Lichang,

Ma Desheng, Zhang Yacai, Xiao Zhangyu and Zhang Jiashu.

Martensitic Stainless Steel Castings for General

Engineering Application

1 Scope

This standard specifies the technical requirements, test methods, inspection rules,

mark, packing, storage and transportation of high strength martensitic stainless steel

in engineering structure uses.

This standard is applicable to the high strength martensitic stainless steel cast in

engineering structure uses.

2 Normative References

The following standards contain the provisions which, through reference in this text,

constitute the provisions of this standard. For dated reference, the subsequent

modification or revisions of these publications do not apply. However, all parties who

reach an agreement according to this standard are encouraged to study whether the

latest edition of these documents is applicable. For undated references, the latest

edition of the normative document is applicable to this standard.

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 228 Metallic Materials - Tensile Testing at Ambient Temperature

GB/T 229 Metallic Materials - Charpy Pendulum Impact Test Method

GB/T 231.1 Metallic Materials - Brinell Hardness Test - Part 1. Test Method

GB/T 231.2 Metallic Brinell Hardness Test - Part 2. Verification and Calibration of

Hardness Testers

GB/T 231.3 Metallic Brinell Hardness Test - Part 3. Calibration of Hardness

Reference Blocks

GB/T 4336 Standard Test Method for Spark Discharge Atomic Emission

Spectrometric Analysis of Carbon and Low-alloy Steel (Routine Method)

GB/T 5677 Radiographic Testing for Steel Castings (GB/T 5677-2007, ISO

4993.1987, IDT)

GB/T 6060.1 Roughness Comparison Specimens Cast Surfaces

GB/T 6414-1999 Castings - System of Dimensional Tolerances and Machining

Allowances (GB/T 6414 - 1999, eqv ISO 8062.1994)

GB/T 7233 Methods for Ultrasonic Testing and for Specifying Quality Levels of Steel

Castings

GB/T 9443 Penetrant Testing for Steel Castings

GB/T 9444 Magnetic Particle Testing for Steel Castings

3 Order Requirements

4 Technical Requirements

5 Test Methods