Powered by Google www.ChineseStandard.net Database: 189759 (19 May 2024)

GB/T 5216-2004 PDF in English


GB/T 5216-2004 (GB/T5216-2004, GBT 5216-2004, GBT5216-2004)
Standard IDContents [version]USDSTEP2[PDF] delivered inName of Chinese StandardStatus
GB/T 5216-2004English105 Add to Cart 0-9 seconds. Auto-delivery. Structural steels subject to end-quench hardenability requirements Obsolete


Standards related to: GB/T 5216-2004

GB/T 5216-2004: PDF in English (GBT 5216-2004)

GB/T 5216-2004
GB
ICS 77.140.20 H 40
NATIONAL STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
Replace GB/T 5216-1985
Structural Steels Subject to End-quench
Hardenability Requirements
ISSUED ON. JANUARY 19, 2004
IMPLEMENTED ON. JULY 1, 2004
Jointly Issued by. General Administration of Quality Supervision, Inspection
and Quarantine (AQSIQ);
Standardization Administration (SAC) of the People's
Republic of China.
Table of Contents
Attachment 1 (Corrigendum) ... 3 
Foreword ... 4 
1 Scope ... 6 
2 Normative References ... 6 
3 Order Contents... 9 
4 Classification and Code Number ... 10 
5 Dimensions, Shape, Weight and Permissible Tolerances ... 10 
6 Technical Requirements ... 11 
7 Testing Method ... 17 
8 Inspection Rules ... 18 
9 Packaging, Marking and Quality Certificate ... 18 
Appendix A (Informative) Calculation Methods of Steel Hardenability) ... 39 
Appendix B (Informative) Comparison Table of Newly-added Grades Listed in Table 1
of This Standard with Overseas Grades ... 44 
Foreword 
This standard replaces GB/T 5216-1985 “Technical Requirements for Structural Steel with
Specified Hardenability Bands”.
Compared with GB/T 5216-1985, the main changes of this standard are as follows.
- Change the standard name to “Structural Steels Subject to End-quench Hardenability
Requirements";
- Add the sections “Normative References”, “Order Contents” and “Smelting Process”
etc.;
- In Article 6.3, add “according to the agreement of the supply and purchaser about the
delivery, the surface of the round steel used for press working may adopt turning, peeling
or other finishing methods”;
- The grades are increased to 24 from 15 (excluding half free cutting steel). Add the 11
grades - 15CrH, 20Cr1H, 15CrMoH, 20CrMoH, 22CrMoH, 42CrMoH, 16CrMnH,
20CrMnH, 15CrMnBH, 17CrMnBH, and 20CrNi2MoH. Delete the 2 grades -
20MnMoBH and 22MnVBH. And add the unified numbering of the grades;
- Tighten the content requirements of residual elements such as sulphur, phosphorus,
chromium, nickel and copper;
- The hardenability bands are classified into H, HH and HL bands from the primary one
band. Add "The supply methods of end-quench hardenability may adopt actual
measurement and calculation according to the formula”;
- Delete the “impression diameter “in Table 3; the primary Articles 3.1.3, 3.1.5, 3.3.2 and
3.4.2; as well as the requirements in relation to “fracture inspection ";
- Change the “segregation” in primary Article 3.6.2 into “Ingot case segregation”. The
Ingot case segregation of the high quality steel is changed from Grade 2.5 into Grade 2;
- Change the primary Article 3.7.1 “Inspection for the non-metallic inclusions in steel"
from agreement item into basic guarantee item. Specify the qualification grades
according to Classes A, B, C and D;
- Change the primary Article 3.7.2 into “the austenite grain size of the steel is not less than
Grade 5”;
- Change “c. Test for impact ductility of non-boron-contained steel” to “c. Test for
mechanical property”. And add “Test for oxygen content of steel”;
- Add the hardenability curve of the 11 newly-added grades. And delete the hardenability
Structural Steels Subject to End-quench Hardenability
Requirements
1    Scope 
This standard specifies the steel dimensions, shape, weight and permissible tolerances,
technical requirements, test methods, inspection rules, packaging, sign and quality certificate
etc. of the hot rolling and hot forging structural steels subject to end-quench hardenability
requirements.
This standard is applicable to the hot rolling and forging structural steel bars of hardenability
used in machinery manufacture with its diameter or thickness no less than 30 mm. The steel
hardenability is determined by edge quenching or calculated by the formula.
2    Normative References 
The following documents contain provisions which, through reference in this text, constitute
provisions of this standard. For dated references, subsequent amendments to (excluding
amending corrigendum), or revisions of, any of these publications do not apply. However, all
parties who have reached 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 222-1984 Method of Sampling Steel for Determination of Chemical Composition
and Permissible Variations for Product Analysis
GB/T 223.3 Methods for Chemical Analysis of Iron, Steel and Alloy - The Diantipyryl
Methane Phosphomolybdate Gravimetric Method for the Determination of Phosphorus
Content
GB/T 223.5 Methods for Chemical Analysis of Iron, Steel and Alloy - The Reduced
Molybdosilicate Spectro - Photometric Method for the Determination of Acid - Soluble
Silicon Content
GB/T 223.11 Methods for Chemical Analysis of Iron, Steel and Alloy - The Ammonium
Persulfate Oxidation Volumetric Method for the Determination of Chromium Content
GB/T 223.14 Methods for Chemical Analysis of Iron, Steel and Alloy - The
N-Benzoy-N-Phenylhydroxylamine Extraction Photometric Method for the Determination
of Vanadium Content
GB/T 223.16 Methods for Chemical Analysis of Iron, Steel and Alloy - The Chromotropic
Acid Photometric Method for the Determination of Titanium Content
GB/T 223.17 Methods for Chemical Analysis of Iron, Steel and Alloy - The Diantipyryl
Methane Photometric Method for the Determination of Titanium Content
GB/T 223.18 Methods for Chemical Analysis of Iron, Steel and Alloy - The
Neocuproine-Chloroform Extraction Photometric Method for the Determination of Copper
Content
GB/T 223.19 Methods for Chemical Analysis of Iron, Steel and Alloy - The
Neocuproine-Chloroform Extraction Photometric Method for the Determination of Copper
Content
GB/T 223.23 Iron, Steel and Alloy - Determination of Nickel Content - The
Dimethylglyoxime Spectrophotometric Method
GB/T 223.24 Methods for Chemical Analysis of Iron, Steel and Alloy - The Extraction
Separation - The Dimethylglyoxime Spectrophotometric Method for the Determination of
Nickel Content
GB/T 223.25 Methods for Chemical Analysis of Iron, Steel and Alloy - The
Dimethylglyoxime Gravimetric Method for the Determination of Nickel Content
GB/T 223.26 Iron, Steel and Alloy - Determination of Molybdenum Content - The
Thiocyanate Spectrophotometric Method
GB/T 223.54 Methods for Chemical Analysis of Iron, Steel and Alloy - The Flame atomic
Absorption Spectrophotometric Method for the Determination of Nickel Content (GB/T
223.54-1987, eqv ISO 4940.1985, Steel and cast iron - Determination of nickel content -
Flame-atomic. absorption spectrophtometric method)
GB/T 223.58 Methods for Chemical Analysis of Iron, Steel and Alloy - The Extraction -
Absorption Catalytic Polarographic Method for the Determination of Manganese Content
GB/T 223.59 Methods for Chemical Analysis of Iron, Steel and Alloy - The Sodium
Arsenite - Sodium Nitrite Titrimetric Method for the Determination of Phosphorus Content
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 223.61 Methods for Chemical Analysis of Iron, Steel and Alloy - The Ammonium
Phosphomolybdate Volumetric Method for the Determination of Phosphorus Content
GB/T 223.62 Methods for Chemical Analysis of Iron, Steel and Alloy - The Butyl Acetate
Extraction Photometric Method for the Determination of Phosphorus Content
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 223.64 Iron, Steel and Alloyed - Determination of Manganese Content - Flame
Atomic Absorption Spectrometric Method
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 223.71 Methods for Chemical Analysis of Iron, Steel and Alloy - The Gravimetric
Method after Combustion in the Pipe Furnace for the Determination of Carbon Content
GB/T 223.72 Methods for Chemical Analysis of Iron, Steel and Alloy - The Alumina
Chromatographic Separation - Bar-Ium Sulfate Gravimetric Method for the Determination
of Sulphur Content
GB/T 223.75 Iron, Steel and Alloy - Determination of Boron Content - Methanol
Distillation-Curcumin Photometric Method
GB/T 223.76 M...
......
 
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.