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GB 13447-2008: [GB/T 13447-2008] Steel blank for seamless gas cylinder
Status: Valid GB 13447: Evolution and historical versions
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| GB 13447-2008 | English | 209 |
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[GB/T 13447-2008] Steel blank for seamless gas cylinder
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GB 13447-2008
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| GB 13447-1992 | English | 199 |
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Steel blank for seamless gas cylinder
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PDF similar to GB 13447-2008
Standard similar to GB 13447-2008 GB/T 13247 GB/T 5068 YB/T 2011 Basic data | Standard ID | GB 13447-2008 (GB13447-2008) | | Description (Translated English) | [GB/T 13447-2008] Steel blank for seamless gas cylinder | | Sector / Industry | National Standard | | Classification of Chinese Standard | H43 | | Classification of International Standard | 77.140.60 | | Word Count Estimation | 8,827 | | Date of Issue | 2008-08-26 | | Date of Implementation | 2009-09-01 | | Older Standard (superseded by this standard) | GB 13447-1992 | | Regulation (derived from) | Announcement of Newly Approved National Standards No. 14 of 2008 (total 127) | | Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China | | Summary | This Chinese standard specifies the seam gas cylinders billet size, shape, weight and tolerances, technical requirements, test methods, inspection rules, packaging, marking and quality certification. This standard applies to the manufacture of high seam gas cylinder billet. | GB 13447-2008: [GB/T 13447-2008] Steel blank for seamless gas cylinder---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Steel blank for seamless gas cylinder
ICS 77.140.60
H43
National Standards of People's Republic of China
Replacing GB 13447-1992
Seamless cylinders with billet
Posted 2008-08-26
2009-09-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Foreword
This standard unless the terms of the agreement, the remaining provisions are mandatory.
This standard replaces GB 13447-1992 "seamless cylinders with billets."
This standard compared with GB 13447-1992, the main differences are as follows.
--- Increase in Chapter 2, "Normative references" and increase the content;
--- Increased 230mm × 230mm, 250mm × 250mm, 280mm × 280mm specifications and the appropriate size to allow deviation
Claim;
--- Cancellation theory billet delivery weight and modify the agreement between;
--- Canceled 40Mn2,40Mn2A steel grades, an increase of 37Mn, 34CrMo steel grades and corresponding chemical composition and mechanical properties
Claim;
--- Tightened the 34Mn2V, 30CrMo steel grades phosphorus, sulfur content requirements;
--- Improving the center porosity level requirements;
--- Modify the inspection rules, increasing the production of continuous casting billet reinspection rules;
--- Modify the content of the flag of the production process.
The standard proposed by China Iron and Steel Association.
This standard is under the jurisdiction of the National Steel Standardization Committee.
This standard is mainly drafted by. Panzhihua Iron and Steel (Group) Corporation, Jiangyin Xingcheng Special Steel Co., Panzhihua New Steel and Vanadium shares have
Limited, Metallurgical Industry Information Standards Institute.
The main drafters of this standard. Li Syria Health, HE Kiyoshi, Chao Feng, on behalf of Huayun, Li Guozhong, Ye Yunliang, Tang calendar.
This standard replaces the standards previously issued as follows.
--- GB 13447-1992.
Seamless cylinders with billet
1 Scope
This standard specifies the seamless cylinders with billet size, shape, weight and tolerance, technical requirements, test methods, inspection rules, package
Equipment, marking and quality certification.
This standard applies to the manufacture of high pressure seamless cylinders billets.
2 Normative references
The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent
Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research
Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard.
GB/T 222 chemical composition of finished steel tolerance
Determination of chromium content GB/T 223.11 Methods for chemical analysis of iron, steel and alloy The ammonium persulfate oxidation volumetric method
GB/T 223.14 Methods for chemical analysis of iron, steel and alloys, tantalum reagent extraction and spectrophotometric determination of vanadium content
GB/T 223.17 steel and alloy chemical analysis method two determination in titanium content for DAM
GB/T 223.23 Methods for chemical analysis of iron, steel and alloy The extraction - dimethylglyoxime spectrophotometric determination of nickel content
Spectrophotometric determination of molybdenum content GB/T 223.26 Methods for chemical analysis of iron, steel and alloy The thiocyanate direct
GB/T 223.30 Methods for chemical analysis of iron, steel and alloys of bromine mandelic acid precipitation - arserazo Ⅲ spectrophotometry
Zirconium content
GB/T 223.53 Methods for chemical analysis of iron, steel and alloys by flame atomic absorption spectrophotometric method for determination of copper content
GB/T 223.60 Methods for chemical analysis of iron, steel and alloy perchloric acid dehydration gravimetric method for the determination of silicon content
GB/T 223.62 Methods for chemical analysis of iron, steel and alloy butyl acetate extraction spectrophotometric determination of phosphorus content
GB/T 223.63 Methods for chemical analysis of iron, steel and alloy The sodium (potassium) for Determination of amount
Determination of sulfur content of potassium iodate titration method after GB/T 223.68 Methods for chemical analysis of iron, steel and alloy tube furnace combustion
After the determination of carbon content - Gravimetric method GB/T 223.71 Methods for chemical analysis of iron, steel and alloy tube furnace combustion
GB/T 223.75 Methods for chemical analysis of iron, steel and alloy methanol distillation - curcumin spectrophotometric determination of boron content
GB/T 226 steel macrostructure and defect etching test method
GB/T 228 metal materials at room temperature tensile test method (GB/T 228-2002, ISO 6892.1998, EQV)
GB/T 229 metal Charpy pendulum impact test method (GB/T 229-2007, ISO 148-1.2006, MOD)
GB/T 1979 structure steel macrostructure and defect of FIG.
General provisions GB/T 2101 steel acceptance, packaging, marking and quality certificate
GB/T 4336 carbon steel and low alloy steel spark source atomic emission spectrometry method (conventional method)
GB/T 10561 non-metallic inclusions in steel - Micrographic method (GB/T 10561-2005, ISO 4967.1998, IDT)
GB/T 20066 Steel and iron - Sampling and determination of the chemical composition of the sample with a sample preparation method (GB/T 20066-2006, ISO 14284.
1996, IDT)
3 size, shape, weight and tolerance
3.1 Dimensions
3.1.1 The cross-sectional dimensions and tolerances
3.1.1.1 seamless cylinders billets with cross-sectional dimensions and tolerances shall comply with the provisions in Table 1.
Table 1 cross-sectional dimensions and tolerances in millimeters
Side side length tolerance diagonal length difference between radius
200 × 200 ± 4.5 ≤6 30
230 × 230 ± 5.0 ≤8 35
250 × 250 + 6.0-5.0 ≤8 35
280 × 280 ± 8.0 ≤11 40
NOTE. radius only pass design, not as a delivery basis.
3.1.1.2 According to the requirements, the agreement by both sides, can supply other sizes of billets, tolerance and its side diagonal length difference should
Specified in the contract.
3.1.2 Length and tolerance
3.1.2.1 billet usual length of 4m ~ 12m.
3.1.2.2 and agreement by both sides in the contract, the length of 2m ~ 4m short ruler blank to allow delivery.
3.1.2.3 billet set, double length agreement by both parties and specified in the contract, will double length tolerance is 0mm ~ 50mm.
3.2 shape
3.2.1 billet may not have a significant twist.
3.2.2 curvature
Curvature per meter slab should be less than 15mm, the total curvature should not exceed 1.5% of the total length.
3.2.3 The broadening of slab steel billet ends may not exceed 10% of the nominal size of the slab cut slope should be less than 8mm.
3.3 wt.
Billet according to the actual weight of the delivery. Agreement by both sides, in accordance with theoretical weight delivery, the theory billet unit weight is determined by supply and demand sides.
4. Technical Requirements
4.1 Designation and chemical composition
4.1.1 Steel grade and chemical composition (melting analysis) should meet the requirements of Table 2. Finished tolerances shall comply with the provisions of GB/T 222's.
4.1.2 residual elements V, Ti, Nb, B, Zr, and the content should not exceed 0.15%. As the supplier to ensure, may be tested.
4.1.3 agreement by both sides, can also provide other grades of steel.
Table 2 Designation and chemical composition (melting analysis)
Trademark
Chemical composition (mass fraction) /%
C Si Mn P S P + S V Cr Mo Ni Cu
34Mn2V
0.30 ~
0.37
0.17 ~
0.37
1.40 ~
1.80
≤0.025 ≤0.025 -
0.07 ~
0.12
≤0.30 - ≤0.20 ≤0.20
37Mn
0.34 ~
0.40
0.17 ~
0.37
1.40 ~
1.75
≤0.030 ≤0.030 - - ≤0.30 - ≤0.20 ≤0.20
30CrMo
0.26 ~
0.34
0.17 ~
0.37
0.40 ~
0.70
≤0.020 ≤0.020 ≤0.030 -
0.80 ~
1.10
0.15 ~
0.25
≤0.20 ≤0.20
34CrMo
0.30 ~
0.37
0.17 ~
0.37
0.60 ~
0.90
≤0.020 ≤0.020 ≤0.030 -
0.90 ~
1.20
0.15 ~
0.30
≤0.20 ≤0.20
Note 1. According to the requirements, grade 30CrMo, 34CrMo sulfur content can be reduced to 0.010%, P + S can be reduced to 0.025%.
Note 2. Grade 34CrMo equivalent EN10083.1 of 34CrMo4.
4.2 Manufacturing Methods
Seamless steel gas cylinders after use oxygen converter or electric furnace smelting and refining, vacuum degassing manufacturing methods.
4.3 Delivery status
In the state of delivery hot rolled seamless cylinders billets.
4.4 Mechanical Properties
4.4.1 mechanical properties of the sample with heat-treated blank prepared specimen can be measured with reference to the provisions of Table 3.
Table 3 Mechanical Properties
Grade sample status
Yield Strength
ReL/MPa
tensile strength
Rm/MPa
The Elongation
A /%
rate of reduction in area
Z/%
Impact energy
Aku/J
34Mn2V
Normalizing ≥510 ≥745 ≥16 ≥45 ≥55
Quenched ≥550 ≥780 ≥12 ≥45 ≥50
37Mn
Normalizing ≥350 ≥650 ≥16 - ≥45
Quenched ≥640 ≥760 ≥16 - ≥50
30CrMo Quenched ≥785 ≥930 ≥12 ≥50 ≥63
34CrMo Quenched ≥835 ≥980 ≥12 ≥45 ≥63
4.4.2 Table 3 for the impact energy of the arithmetic mean of three samples, three samples are allowed to have a value smaller than a predetermined value, but not less than Regulation
70% of the set value.
4.5 low magnification
4.5.1 Transverse acid leaching slab on low magnification specimen there is no visible residual shrinkage, white point, delamination, cracks, bubbles, foreign bodies and metal clip
miscellaneous. Depth skin and subcutaneous bubble inclusions shall not exceed 2mm.
4.5.2 acid leaching low magnification level shall comply with the requirements of Table 4.
4.5.3 continuous casting technology, the size of not less than 250mm × 250mm billet, center porosity level consultations by both parties
determine.
Table 4 low magnification
Project Name segregation center porosity generally loose
Low magnification level/level ≤2.0 ≤1.5 ≤2.5
4.6 Non-metallic inclusions
Non-metallic inclusions should be GB/T 10561 inspection method A, the test results should meet the requirements of Table 5.
Table 5 nonmetallic inclusions
A Class/Grade Class B/C grade class/grade
≤2.5 ≤2.5 ≤2.5
4.7 surface quality
4.7.1 billet end face there is no visible shrinkage, inclusions and stratification.
4.7.2 billet surface may not have scarring, inclusions, folding, crack and ears.
4.7.3 billet surface allows the depth of not more than 1mm hairline and no deeper than the side length of the allowable negative deviation of individual scratches, indentation, concave
Pit and pitting exist. Nicks and depression due to the roll joints caused by the projection shall not exceed 2mm.
4.7.4 slab surface defects should be cleaned. Cleanup should be carried out along the longitudinal direction of the billet, no clean up at the edges and corners should be smooth, clear width of not less than
Five times the depth cleanup, clean-depth on the same cross-section (from the date of actual size) must not exceed 7.5% of nominal size.
5 Test methods
5.1 test items, the number of samples, sampling methods and test methods
Billet test items, the number of samples, sampling methods and the corresponding test methods shall be in accordance with Table 6.
Table 6 test items, the number of samples, sampling methods and test methods
Test item number of samples
Sampling sites
Molding casting
experiment method
Chemical composition 1/furnace GB/T 20066 GB/T 223, GB/T 4336
Tensile test 1/batch
Impact test group 1 (3)/Batch
A low magnification/batch
Equivalent steel ingot head
Blank ends, according to FIG. 1
Cut the position shown
A press on any billets
Cut the position shown in Figure 1
GB/T 228
GB/T 229
Any of a billet on GB/T 226, GB/T 1979
Non-metallic inclusions 1/batch
Equivalent slab ingot head
Ends
GB/T 10561
One on any billets
GB/T 10561
GB/T 10561
Size, shape
Surface Quality
Supported by
Suitable tools to detect the amount of cards
Visually
Figure 1 a schematic view of tensile and impact tests with sample probe location
6 Inspection rules
6.1 inspection and acceptance
Billet inspection and acceptance by the supplier is responsible for the technical quality supervision departments, the need for acceptance is entitled in accordance with this standard.
6.2 Batch rules
Billet should be granted acceptance, each batch from the same heat, the same brand, same size billet components.
6.3 reinspection and decision rules
6.3.1 Impact test
At first test failed, should be on the same furnace number three and then take another branch billet retest samples, sample test results before and after the six arithmetic
The average of not less than the predetermined value, less than the predetermined value of not more than two individual specimens, samples of which can not be less than 70% of the more than one.
6.3.2 low magnification, non-metallic inclusions, tensile test
6.3.2.1 White point allowed a retest.
6.3.2.2 For the molding process to produce billets, at first failed test, the billet early test failed to pick out, the equivalent of the ingot in any batch
Head "A" section of the billet end double take samples of the defective item retest. Results retest if a specimen failed, the batch
All "A" section of the slab can not be accepted. At this early test samples taken from the "A" section of the billet and the other end and then cut the sample tested. If the test result
There is still a failure, then the batch shall not be accepted.
6.3.2.3 For continuous casting billet production, at first failed test, the billet early test failed to pick out, should retest samples were collected from two
Since the beginning of the test samples of the same cast and another stream flow casting rolling billets, two retest samples retest results are satisfactory, the whole batch is qualified. Two samples were re-inspection
Standard, should again test sample, in which the same stream twice cast the test results fail, the casting flow failure; if a test failed, then
Where the failure to respond casting billet casting stream and other streams continue billet rolling on sampling and testing, until qualified so far.
6.3.3 Other
Other inspection reinspection implementation of the project according to the provisions of GB/T 2101's.
7 Marking and Quality Certification
7.1 marks
In the end marked billet steel grade, heat number, the molding process to produce billet, billet end face of the ingot head must all
Clearly marked "A" word, the end face of the ingot billet tail marked "Z" word. For the production of billet continuous casting process should be marked at one end of the stream or No.
Sequence number.
7.2 Quality Certificate
Content quality certificate shall comply with the relevant provisions of GB/T 2101's.
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