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GB/T 6967-2009 (GBT6967-2009)

GB/T 6967-2009_English: PDF (GBT 6967-2009, GBT6967-2009)
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GB/T 6967-2009English75 Add to Cart 0--9 seconds. Auto-delivery Martensitic stainless steel castings for general engineering application Valid GB/T 6967-2009

BASIC DATA
Standard ID GB/T 6967-2009 (GB/T6967-2009)
Description (Translated English) Martensitic stainless steel castings for general engineering application
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard J31
Classification of International Standard 77.140.80
Word Count Estimation 8,837
Date of Issue 2008-12-31
Date of Implementation 2009-09-01
Older Standard (superseded by this standard) GB/T 6967-1986
Adopted Standard ISO 11972-1998, MOD; ISO 4990-2003, MOD
Drafting Organization Shenyang Research Institute of Foundry
Administrative Organization Casting National Standardization Technical Committee
Regulation (derived from) National Standard Approval Announcement 2009 No.2 (Total No.142)
Proposing organization National Foundry Standardization Technical Committee
Issuing agency(ies) Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China; Standardization Administration of China
Summary This standard specifies the use of engineering structures, high strength martensitic stainless steel castings technical requirements, test methods, inspection rules and signs, packaging and storage. This standard applies to engineering structures with high strength martensitic stainless steel castings.

Standards related to: GB/T 6967-2009

GB/T 6967-2009
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 77.140.80
J 31
Replacing GB/T 6967-1986
Martensitic Stainless Steel Castings for General
Engineering Application
(ISO 11972.1998, Corrosion-resistant cast steels for general application;
ISO 4990.2003, Steel castings – General technical delivery requirements, MOD)
ISSUED ON. DECEMBER 31, 2008
IMPLEMENTED ON. SEPTEMBER 01, 2009
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine of the People's Republic of China;
Standardization Administration of the People's Republic of
China.
Table of Contents
1 Scope ... 5 
2 Normative References ... 5 
3 Order Requirements ... 6 
4 Technical Requirements ... 6 
5 Test Methods ... 9 
6 Inspection Rules ... 10 
7 Mark, Packing, Storage and Transportation ... 12 
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
3.1 The adoptive standard, material designation, quantity, corresponding technical
requirements, examination item and supply status shall be specified definitely in the
order contract or order agreement by demanders; the order pattern shall be provided
to suppliers.
3.2 The additional requirements beyond this standard proposed by demanders shall
be confirmed basing on the agreement of both the supplier and the purchaser.
4 Technical Requirements
4.1 Chemical composition
4.1.1 The chemical composition of each cast steel designation shall be in
accordance with those specified in Table1.
4.1.2 Unless otherwise specified, the residual element content shall not be regarded
as the acceptance criterion.
4.1.3 For ZG04Crl3Ni4Mo and ZG04Crl3Ni5Mo, the gas content of refined molten
steel shall be controlled as. [H]≤3 × 10-6, [N] ≤200X10-6, [O]≤100×10-6, unless
otherwise specified, the gas content shall not be regarded as the acceptance criterion.
shall be recognized by the demander.
4.4.4 The scalding of biggish defects shall be agreed by the demander.
4.4.5 That the depth of pits which are prepared for scalding is more than 20% of
casting section thickness or 25 mm (take the smaller among two) or there is leakage
for hydraulic test of pressure-bearing cast shall be regarded as the biggish defect.
4.4.6 Stress relief heat treatment shall be carried out after the scalding of biggish
defects; the scalding shall be inspected according to the detection standard of the
cast and qualified scalding shall be confirmed.
4.5 Dimensional Tolerances for Castings and surface roughness
4.5.1 Dimensional Tolerances for Castings and machining allowance shall meet the
pattern or order agreement; if there are no provisions in the pattern or order
agreement, Dimensional Tolerances for Castings and machining allowance shall
meet the provisions of GB/T 6414.
4.5.2 The cast surface roughness shall meet the provisions of GB/T 6060.1.
4.6 Cast surface quality
Burr shall be repaired and casting head shall be removed for cast; the burnt on sand
and oxide skin on surface shall be removed.
5 Test Methods
5.1 Chemical composition
Chemical analysis sample method shall be carried out according to GB/T 222;
spectral analysis shall be carried out according to GB/T 4336; chemical composition
arbitrary analysis shall be carried out according to GB/T 223.
5.2 Tensile Test
Tensile test shall be carried out according to GB/T 228.
5.3 Impact Test
Impact test shall be carried out according to GB/T 229.
5.4 Hardness Test
Hardness test shall be carried out according to GB/T 231.1~223.3.
5.5 Non-destructive Testing
one sample result which is unqualified in the second inspection, the supplier may do
according to 6.4.
6.3.2 Three spare impact samples shall be taken from the same furnace order; the
result and original result are added and the average value shall be calculated again. If
the new average value is in accordance with those specified in Table 2, the impact
value for this batch of cast is still qualified; otherwise the supplier may do according to
6.4.
6.4 Re-heat treatment
If the re-inspection result for mechanical property is still not in accordance with those
specified in Table 2, the heat treat for cast and test block shall be done again; then the
test shall be done according to 6.2.4 and GB/T 6967-20092.5 again; the times of
re-heat treatment shall not exceed 2 (except tempering) if it's not through the
agreement of the demander.
6.5 Non-destructive testing
The penetration, magnetic particle, ultrasonic wave or radiography ma...
...