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GB/T 3639-2009 English PDF (GBT3639-2009)

GB/T 3639-2009 English PDF (GBT3639-2009)

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GB/T 3639-2009: Seamless cold-drawn or cold-rolled steel tubes for precision applications

This Standard specifies classification, code, dimension, shape, weight, permissible deviations, technical requirements, test methods, inspection rules, packaging, marking, and quality certificate of cold-drawn or cold-rolled precision seamless steel tubes.
GB/T 3639-2009
GB
ICS 77.140.75
H 48
National Standard
of the PEOPLE Republic of China
Replacing GB/T 3639-2000
Seamless cold-drawn or cold-rolled steel tubes
for precision application
ISSUED ON. OCTOBER 30, 2009
IMPLEMENTED ON. MAY 1, 2010
Issued by. General Administration of Quality Supervision, Inspection and Quarantine of the PEOPLE Republic of China;
Standardization Administration Committee.
Table of Contents
Foreword ... 3
1 Scope ... 5
2 Normative references ... 5
3 Classification and code ... 7
4 Order content ... 7
5 Dimension, shape, weight, and permissible deviations ... 7
6 Technical requirements ... 11
7 Inspection and test methods ... 14
8 Inspection rules ... 15
9 Packaging, marking, and quality certificate ... 15
Annex A ... 16
Annex B ... 17
Annex C ... 19
Annex D ... 20
Foreword
This Standard modifies and adopts EN 10305-1.2002 ?€?Steel tubes for precision applications - Technical delivery conditions - Part 1. Seamless cold drawn tubes?€? (English version).
This Standard was re-drafted according to EN 10305-1.2002. A table is given in Annex A about the comparison of chapter and article numbers between this Standard and EN 10305-1.2002.
When adopting EN 10305-1.2002, this Standard has made some modifications. The relevant technical differences have been integrated in the main-text and marked with vertical single-lines at the page-margin of the articles involved. A table is given for reference in Annex B about these technical differences and reasons.
For ease of use, this Standard has made the following editorial changes to EN 10305-1.2002.
a) CHANGE ?€?the European standard?€? INTO ?€?this Standard?€?;
b) USE decimal point ?€?.?€? To replace the ?€?,?€? that is acted as decimal point; c) DELETE the foreword of EN 10305-1.2002; ADD the foreword of this Standard. This Standard replaces GB/T 3639-2000 ?€?Cold-drawn or cold-rolled precision seamless steel tubes?€?. Compared with GB/T 3639-2000, the main changes of this Standard are as follows.
?€? MODIFY the classification code;
?€? ADD the order content;
?€? MODIFY the curvature of steel-tubes;
?€? DELETE the example of marks;
?€? ADD the steel grades;
?€? MODIFY the smelting method of steel;
?€? DELETE the manufacturing method of tube blank;
?€? MODIFY the mechanical property of tube blank;
?€? ADD the flattening test;
?€? ADD the drift expanding test;
?€? ADD the magnetic flux leakage inspection of steel tubes;
?€? ADD Annex A, Annex B, Annex C, Annex D of this Standard.
Annex A, B, C, D of this Standard are informative.
This Standard was proposed by the China Iron and Steel Association.
This Standard shall be under the jurisdiction of the National Steel Technical Committee.
Responsible drafting organization of this Standard. Baoshan Iron and Steel Co., Ltd. Participating drafting organizations of this Standard. Jiangsu Fengli Precision Tube Co., Ltd., and Jiangyin Jieda Shaped Tube Co., Ltd..
Main drafters of this Standard. Luo Yuqing, Zhang Yaofei, Liu Cailing, Wu Yueming, Xue Jianliang, and Chen Weichi.
The previous editions replaced by this Standard are as follows.
?€? GB/T 3639-1983, and GB/T 3639-2000.
Seamless cold-drawn or cold-rolled steel tubes for
precision application
1 Scope
This Standard specifies classification, code, dimension, shape, weight, permissible deviations, technical requirements, test methods, inspection rules, packaging, marking, and quality certificate of cold-drawn or cold-rolled precision seamless steel tubes.
This Standard is applicable to cold-drawn or cold-rolled precision seamless steel tubes that require special dimensional accuracy and high surface quality, and that are used for manufacturing mechanical structure, hydraulic equipment, auto parts, etc. 2 Normative references
The provisions in following documents become the provisions of this Standard through reference in this Standard. For dated references, the subsequent amendments (excluding corrigendum) or revisions do not apply to this Standard, however, parties who reach an agreement based on this Standard are encouraged to study if the latest versions of these documents are applicable. For undated references, the latest edition of the referenced document applies.
GB/T 222 Permissible Tolerances for Chemical Composition of Steel Products GB/T 223.5 Steel and iron - Determination of acid-soluble silicon and total silicon content - Reduced molybdosilicate spectrophotometric method (GB/T 223.5-2008, ISO 4829-1.1986, ISO 4829-2.1988, MOD)
GB/T 223.12 Methods for chemical analysis of iron, steel and alloy - The sodium carbonate separation-diphenyl carbazide photometric method for the determination of chromium content
GB/T 223.23 Iron steel and alloy - Determination of nickel content - The dimethylglyoxime spectrophotometric method
GB/T 223.26 Iron steel and alloy - Determination of molybdenum content - The thiocyanate spectrophotometric method
GB/T 223.53 Methods for chemical analysis of iron, steel and alloy - The flame atomic absorption spectrophotometric method for the determination of copper content
GB/T 223.59 Iron steel and alloy - Determination of phosphorus content - Bismuth phosphomolybdate blue spectrophotometric method and antimony
phosphomolybdate blue spectrophotometric method
GB/T 223.63 Methods for chemical analysis of iron, steel and alloy - The sodium (potassium) periodate photometric method for the determination of manganese content
GB/T 223.68 Methods for chemical analysis of iron, steel and alloy - The potassium iodate titration method after combustion in the pipe furnace for the determination of sulfur content
GB/T 223.69 Iron steel and alloy - Determination of carbon contents -
Gas-volumetric method after combustion in the pipe furnace
GB/T 228 Metallic materials - Tensile testing at ambient temperature (GB/T 228-2002, ISO 6892.1998, EQV)
GB/T 242 Metallic materials - Tube - Drift-expanding test (GB/T 242-2007, ISO 8493.1998, IDT)
GB/T 246 Metal materials - Tube - Flattening test (GB/T 246-2007, ISO 8492.1998, IDT)
GB/T 699 Quality carbon structural steels
GB/T 1031 Surface roughness parameters and their values
GB/T 1591 High strength low alloy structural steels
GB/T 2102 Acceptance packing, marking and quality certification of steel pipe GB/T 4336 Standard test method for spark discharge atomic emission
spectrometric analysis of carbon and low-Alloy steel (routine method)
GB/T 7735-2204 Steel tubes - The inspection method on eddy current test (GB/T 7735-2004, ISO 9304.1989, MOD)
GB/T 12606 Steel tubes - The testing method of magnetic flux leakage (GB/T 12606-1999, eqv ISO 9402.1989, ISO 9598.1989)
GB/T 17395 Dimensions, shapes, masses and tolerances of seamless steel tubes (GB/T 13795-2008, ISO 1127.1992, ISO 4200.1991, ISO 5252.1991, NEQ)
GB/T 20066 Steel and Iron - Sampling and preparation of samples for the determination of chemical composition (GB/T 20066-2006, ISO 14284.1996, IDT) incision margin according to the following specifications.
a) Outer diameter???159mm. 5mm~10mm;
b) Outer diameter>159mm. 10mm~15mm.
5.2.3 According to the requirements of the buyer, through both parties?€? mutual negotiation, and indicated in the contract, it can supply the steel-tubes of other length and permissible deviations.
5.3 Curvature
5.3.1 Curvature of steel-tube shall not be greater than 3.0mm/m.
5.3.2 The total length (L) curvature of steel-tube whose outer diameter is greater than 16mm shall comply with the following specifications.
a) ReH???500 MPa, ???0.15%L;
b) ReH>500 MPa, ???0.20%L.
5.3.3 According to the requirements of the buyer, through both parties?€? mutual negotiation, and indicated in the contract, the steel-tubes?€? curvature per meter and total length can adopt other specifications.
5.4 End shape
The end surfaces of steel-tubes?€? both ends shall be perpendicular to the axis. Incision burr shall be removed.
5.5 Out-of-roundness and wall thickness unevenness
5.5.1 The out-of-roundness of the steel-tubes shall not be greater than 80% of the outer diameter?€? tolerance.
5.5.2 According to the requirements of the buyer, the wall thickness unevenness of steel-tubes can be negotiated by both buyer and supplier.
5.6 Delivery weight
The steel-tubes are delivered according to the actual weight, or they can be delivered according to the theoretical weight. Theoretical weight per meter shall be in accordance with the specification of GB/T 17395 (the steel density is 7.85/dm3). According to the requirements of the buyer, through both parties?€? mutual negotiation, and indicated in the contract, the permissible deviations of th...

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