Skip to product information
1 of 7

PayPal, credit cards. Download editable-PDF and invoice in 1 second!

TB/T 1979-2014 English PDF (TBT1979-2014)

TB/T 1979-2014 English PDF (TBT1979-2014)

Regular price $70.00 USD
Regular price Sale price $70.00 USD
Sale Sold out
Shipping calculated at checkout.
Quotation: In 1-minute, 24-hr self-service. Click here TB/T 1979-2014 to get it for Purchase Approval, Bank TT...

TB/T 1979-2014: Atmospheric corrosion resisting steel for railway rolling stock

This Standard specifies the dimension, shape, weight and allowable deviation, representation method of steel grades, technical requirements, inspection methods, inspection rules, packaging, marking and quality certificates of atmospheric corrosion resisting steel for railway rolling stock.
TB/T 1979-2014
TB
RAILWAY INDUSTRY STANDARD OF
THE PEOPLE REPUBLIC OF CHINA
ICS 45.060.20
S 05
Replacing TB/T 1979-2003
Atmospheric corrosion resisting steel for
railway rolling stock
ISSUED ON. SEPTEMBER 26, 2014
IMPLEMENTED ON. MARCH 1, 2015
Issued by. State Railway Administration
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative references ... 4
3 Dimension, shape, weight and allowable deviation ... 5
4 Representation method of steel grades ... 5
5 Technical requirements ... 6
6 Inspection methods ... 10
7 Inspection rules ... 11
8 Packaging, marking and quality certificate ... 12
Annex A (informative) Comparison table of atmospheric corrosion resisting steel grades in old- and new- version standards ... 13
Foreword
This Standard is drafted according to the rules given in GB/T 1.1-2009. This Standard replaces TB/T 1979-2003 ?€?Ordering technical conditions of atmospheric corrosion resisting steel for railway rolling stock?€?; compared with TB/T 1979-2003, main technical changes are as follows.
- ADD the representation method of atmospheric corrosion resisting steel grades (see Clause 4);
- The naming of atmospheric corrosion resistant steel grades is changed from the naming by the main chemical composition in steel TO the naming by the lower yield limit of steel (see 5.1.1 of this Standard, 4.1.1 of 2003 version); - ADD the high-strength atmospheric corrosion resisting steel (see Table 1); - MERGE the cold-rolled 05CuPCrNi steel and cold-rolled 09CuPCrNi-A in the original standard (see Table 1);
- ADD the requirements for the control sample Q345B of corrosion resistance test (see Table 6);
- MODIFY the batch weight of atmospheric corrosion resisting steel (see 7.2 of this Standard, 6.3 of 2003 version);
- ADD the requirements for the corrosion resistance test frequency (see 7.2); - ADD the comparison table of atmospheric corrosion resisting steel grades in new- and old-version standards (see Annex A).
This Standard is proposed by and under the jurisdiction of Institute of Standards and Metrology of Ministry of Railways.
Drafting organizations of this Standard. Institute of Standards and Metrology of Ministry of Railways, Institute of Metals and Chemistry of Institute of Intercalary Railway, Baoshan Iron and Steel Co., Ltd.
Main drafters of this Standard. Zhu Mei, Gao Junli, Zhang Bin, Yang Songbai, Qu Zhaoxia.
The previous version of the standards replaced by this Standard are as follows. - TB/T 1979-1987, TB/T 1979-2003.
Atmospheric corrosion resisting steel for railway
rolling stock
1 Scope
This Standard specifies the dimension, shape, weight and allowable deviation, representation method of steel grades, technical requirements, inspection methods, inspection rules, packaging, marking and quality certificates of atmospheric corrosion resisting steel for railway rolling stock.
This Standard applies hot-rolled and cold-rolled steel sheet, plate and strip and structural steel of atmospheric corrosion resisting steel for railway rolling stock. 2 Normative references
The following documents are indispensable for the application of this document. For dated references, only the dated edition applies to this document. For undated references, the latest edition (including all amendments) applies to this document. GB/T 222 Permissible tolerances for chemical composition of steel products GB/T 223 Methods for chemical analysis of iron, steel and alloy
GB/T 228.1 Metallic materials - Tensile testing - Part 1. Method of test at room temperature
GB/T 229 Metallic materials - Charpy pendulum impact test method
GB/T 232 Metallic materials - Bend test
GB/T 247 General rule of package mark and certification for steel plates (sheets) and strips
GB/T 706 Hot rolled section steel
GB/T 708 Dimension shape weight and tolerance for cold-rolled steel plates and sheets
GB/T 709 Dimension, shape, weight and tolerances for hot-rolled steel plates and sheets
GB/T 2101 General requirement of acceptance packaging marking and certification for section steel
GB/T 2975 Steel and steel products - Location and preparation of test pieces for mechanical testing
GB/T 4336 Carbon and low-alloy steel - Determination of multi-element contents - Spark discharge atomic emission spectrometric method (routine method)
GB/T 6394 Metal - Methods for estimating the average grain size
GB/T 10561 Steel - Determination of content of nonmetallic inclusions - Micrographic method using standards diagrams
GB/T 17505 Steel and steel products - General technical delivery requirements GB/T 20066 Steel and iron - Sampling and preparation of samples for the determination of chemical composition
GB/T 20125 Low-alloy steel - Determination of multi-element contents - Inductively coupled plasma atomic emission spectrometric method
TB/T 2375 Test method for cyclic wetting corrosion of weathering steels for railway applications
3 Dimension, shape, weight and allowable deviation
3.1 The dimension, shape, weight and allowable deviation of steel plates, sheets and strips shall comply with the relevant specifications of GB/T 709, GB/T 708. 3.2 The dimension, shape, weight and allowable deviation of hot-rolled steels shall comply with the relevant specifications of GB/T 706; the dimension, shape, weight and allowable deviation of cold-formed steels shall comply with the corresponding product specifications.
4 Representation method of steel grades
The steel grade consists of the lower yield strength code, lower yield strength limit value, atmospheric corrosion resisting steel code, delivery state code and steel category, the specific structure is as follows.
0.55 3.50 0.65
Q400NQR1 ??? 0.12 ??? 0.75 ??? 1.10 ??? 0.025 ??? 0.008 0.20 ~0.55 ?€?
0.30 ~
1.25
0.12 ~
0.65 ?€?
Q450NQR1 ??? 0.12 ??? 0.75 ??? 1.50 ??? 0.025 ??? 0.008 0.20 ~0.55 ?€?
0.30 ~
1.25
0.12 ~
0.65 ?€?
Q450EWR1 ??? 0.07 ??? 0.50 ??? 1.50 ??? 0.020 ??? 0.010 0.30 ~0.55 ?€?
3.00 ~
5.50
0.10 ~
0.65 ?€?
Q500NQR1 ??? 0.12 ??? 0.75 ??? 2.00 ??? 0.025 ??? 0.008 0.20 ~0.55 ?€?
0.30 ~
1.25
0.12 ~
0.65 ?€?
Q550NQR1 ??? 0.16 ??? 0.75 ??? 2.00 ??? 0.025 ??? 0.008 0.20 ~0.55 ?€?
0.30 ~
1.25
0.12 ~
0.65 ?€?
Q265NQL2 ??? 0.12 0.10 ~ 0.40
0.20 ~
0.50
0.060 ~
0.12 ??? 0.020
0.25 ~
0.45 ?€?
0.30 ~
0.65
0.25 ~
0.50 ?€?
Q310NQL2 ??? 0.12 0.25 ~ 0.75
0.20 ~
0.50
0.060 ~
0.12 ??? 0.020
0.25 ~
0.50 ?€?
0.30 ~
1.25
0.12 ~
0.65 ?€?
Q310NQL3 ??? 0.12 0.20 ~ 0.40
0.25 ~
0.55
0.060 ~
0.12 ??? 0.020
0.25 ~
0.50
Ti ???
0.030 ?€? ?€?
0.010 ~
0.040
NOTE. See Annex A for the comparison of atmospheric corrosion resisting steel grades in new- and old-version standards.
a RE value is the rare-earth content in the finished steel. when S ??? 0.01%, it can guarantee a certain amount of rare earth residues.
5.1.2 In order to improve the properties of steels, for Category 1 and Category 2 steels, it may add trace alloying elements such as V, Nb, Ti, however, the sum of these alloys shall not exceed 0.22%.
5.1.3 The allowable upper deviation between the chemical composition of rare-earth elements in the finished steel and the specified value in Table 1 is 0, and the allowable lower deviation is -0.0040%. The allowable deviation between other chemical compositions in the finished steel and the specified in Table 1 shall comply with the specifications of GB/T 222.
5.2 Smelting method
The steel is smelted by the oxygen converter or electric furnace, to become the killed steel.
5.3 Delivery state
5.3.1 Hot-rolled steels shall be delivered in hot-rolled or hot-rolled annealed condition; cold-rolled steel plates, sheets and strips shall be delivered in annealed flat condition. Through the negotiation between the supply and demand parties, hot-rolled steel plates, sheets and strips can be delivered after being pickled.
5.3.2 When delivered in flat plate, the four sides of the steel plate shall be neat and at NOTE. D in the table is the diameter of the bend, ?? is the nominal thickness of steel. a When the yield phenomenon is not obvious, use ReL2.
5.4.3 The V-notch impact test results shall comply with the specifications in Table 3. The impact test results are the average of the three test samples, one of which shall be allowed to have a single value lower than the specified value in Table 3, but not lower than 70% of the specified value. When the thickness of steel is less than 6 mm, the impact test is not carried out.
When using small dimension (5 mm x 10 mm x 55 mm, 7.5 mm x 10 mm x 55 mm) samples for impact test, the impact absorption energy shall not be less than 50%, 75% of the specified value, respectively.
Table 3 Impact properties
Steel grade Thickness mm
Impact absorption energy KV2 (-40??C)
Q295NQR2
??? 12 ??? 27
Q295NQR3
Q345NQR2
Q345NQR3
Q345NQR4
Q350EWRI
??? 12 ??? 60
Q400NQR1
Q450NQR1
Q450EWm
Q500NQR1
Q550NQR1
5.5 Grain size
The grain size shall not be less than Grade 7.
...

View full details