YB/T 5346-2006 PDF in English
YB/T 5346-2006 (YB/T5346-2006, YBT 5346-2006, YBT5346-2006)
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Cold drawn special shaped steel bar
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YB/T 5346-2006: PDF in English (YBT 5346-2006) YB/T 5346-2006 (renamed from GB 13791-92)
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
UDC 669.14/.15
H 44
YB/T 5346-2006
Renamed from GB 13791-92
Cold drawn special shaped steel bar
APPROVED ON: NOVEMBER 16, 1992
IMPLEMENTED ON: JUNE 1, 1993
Issued by: State Technical Supervision Bureau
Table of Contents
1 Scope ... 3
2 Normative references ... 3
3 Classification and codes ... 4
4 Dimensions, appearance and weight ... 4
5 Technical requirements ... 6
6 Test methods ... 8
7 Acceptance rules ... 9
8 Packaging, marking and quality certificate ... 9
Additional information: ... 19
Cold drawn special shaped steel bar
1 Scope
This Standard specifies the dimensions, appearance, technical requirements,
test methods, inspection rules, packaging, marking, and quality certificate of
the cold drawn special shaped steel bar (hereinafter referred to as “special
shaped steel bar”).
This Standard applies to the cold drawn special shaped steel bars of high
quality carbon structural steel and alloy structural steel with a cross-sectional
area greater than 30mm2. The special shaped steel bars of other steel types
may also be used as reference.
2 Normative references
GB 222 Method of sampling steel for determination of chemical
composition and permissible variations for product analysis
GB 223 Methods for chemical analysis of iron, steel and alloy
GB 224 Determination of depth of decarburization of steels
GB 226 Test method for macrostructure and defect of steel by etching
GB 231 Metallic materials – Brinell hardness test
GB 699 Quality carbon structure steel – Technical conditions
GB 1804 Tolerance and fitting – Limits of deviation without indication of
tolerance dimensions
GB 1979 Diagram of a low magnification texture blemish grading of
structural steel
GB 2101 General requirement of acceptance, packaging, marking and
certification for section steel
GB 3077 Alloy structure steel – Technical requirements
GB 3078 Technical requirements for quality structural steel cold drawn
bars
4.4.1.1 The special shaped steel bars delivered in straight strips shall be
generally 2~6m in length.
4.4.1.2 The special shaped steel bars with a length greater than 6m may be
supplied by the agreement between the supplier and the demander.
4.4.2 Specified-length and multiple-length
4.4.2.1 When delivered in specified-length and multiple-length, the
permissible variation in length shall not exceed +50mm. When delivered in
specified-length and multiple-length, it shall be indicated in the contract.
4.5 Delivery weight
4.5.1 The special shaped steel bars shall be delivered according to the
actual weight, and may also be delivered according to the theoretical weight.
4.5.2 The special shaped steel bars delivered without cutting heads shall be
deducted from the weight of the head deformation portion by 2%.
4.6 Marking example
The FD-X asymmetric section cold drawn special shaped steel bar, made of
#20 high-quality carbon structural steel, with a dimensional accuracy of Grade
12, is marked as:
Cold drawn special shaped steel bar
5 Technical requirements
5.1 Designation and chemical components
The designation of the special shaped steel bar shall be indicated in the
contract, and its chemical components (melting analysis) shall comply with
the provisions of GB 699 and GB 3077. According to the agreement between
the supplier and the demander and indicated in the contract, it may be
manufactured with the designation of other steel types.
5.2 Delivery state
The special shaped steel bars shall be delivered in a cold drawn state.
According to the requirements of the demander, it may be delivered in a state
of heat treatment (annealing, normalizing, tempering, etc.), but it shall be
indicated in the contract.
5.3 Mechanical properties
6 Decarburization (Different pieces of steel) 2 GB 224
6.2 The overall dimensions and bending of the special shaped steel bar
shall be measured at 150mm from the end (for the special shaped steel bars
without cutting heads, the length of the head deformation portion shall be
removed).
6.3 The surface defect depth of the special shaped steel bar may be
inspected and determined after grinding with a grinding wheel, a file or an
abrasive cloth if necessary.
7 Acceptance rules
7.1 Inspection and acceptance
The inspection and acceptance of the special shaped steel bar shall be
carried out by the technical quality supervision department of the supplier.
7.2 Batch grouping rules
The special shaped steel bars shall be accepted in batches. Each batch shall
consist of special shaped steel bars of the same furnace tank number, the
same overall dimensions, and the same heat treatment furnace (at the time of
heat treatment).
7.3 Sample size
The sample size for the inspection of the special shaped steel bar shall
comply with the provisions of Table 4.
7.4 Re-inspection and decision rules
The re-inspection and decision rules of the special shaped steel bar shall
comply with the provisions of GB 2101.
8 Packaging, marking and quality certificate
8.1 For special shaped steel bars, the packaging shall be in accordance
with the provisions for Class I packaging of GB 2101; and the marking and
quality certificate shall be in accordance with the corresponding provisions of
GB 2101.
8.2 The special shaped steel bars treated by surface phosphating may also
be delivered by dipping (coating) rust-preventative oil according to the
requirements of the demander.
......
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.
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