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Position: Chinese Standard in English/GB/T 226-1991
GB/T 226-1991   Etch test for macrostructure and defect of steels (English Version)
Standard No.: GB/T 226-1991 Status:superseded remind me the status change

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Language:English File Format:PDF
Word Count: 2000 words Price(USD):184.0 remind me the price change

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Implemented on:1992-3-1 Delivery: via email in 1 business day
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Standard No.: GB/T 226-1991
English Name: Etch test for macrostructure and defect of steels
Chinese Name: 钢的低倍组织及缺陷酸蚀检验法
Professional Classification: GB    National Standard
Issued by: State Bureau of Technical Supervision
Issued on: 1991-06-22
Implemented on: 1992-3-1
Status: superseded
Superseded by:GB/T 226-2015 Test method for macrostructure and defect of steel by etching
Superseded on:2016-6-1
Language: English
File Format: PDF
Word Count: 2000 words
Price(USD): 184.0
Delivery: via email in 1 business day
This standard refers to the International Standard ISO 4969-1980 "Steel-Macroscopic Examination by Etching with Strong Mineral Acids". 1. Subject Content and Application Scope This national standard specifies the inspection for the hot and cold acid etch and electric erosion method of the steel’s macrostructure and defects. This standard is applicable to inspection of steel's macrostructure and defect. Arbitrating inspection shall be subject to hot acid etching method is there is no specific requirements on technical condition. 2. Specimen 2.1 Specimen Intercept Specimen intercept's position, quantity and test condition shall be conducted according to relevant standard, technical condition or requirements in mutual agreement. In case of no requirements, take two specimens from the steel products (billet) according to melting (batch) number. Manufacturing plant shall sample from the most severe defect position, generally intercepting the header of the equivalent first and last panel (branch) of steel ingot. As to continuous casting blank, intercepting a piece of specimen from the first billet after adjusting continuous casting drawing speed, according to melting (batch) number.. 2.2 Sampling Method Use methods such as cut, saw and cutting to sample. When processing the specimen, remove manufacturing deficiency such as deformation and heat-affected zone as well as crack, which is caused by sampling. After processing, surface roughness of test surface shall be not larger than 1.6μm, cold acid etching method not larger than 0.8μm, test surface is no oily soil and processing scratches, if necessary take pre-cleaning. The reference dimension between test surface and cut surface is: a. Hot cutting not less than 20mm; b. Cold cutting not less than 10mm; c. Burning not less than 40mm. 2.3 Sample Size Generally thickness of transverse test-piece is 20mm; test surface shall be perpendicular to bearing of trend of steel products (billet). generally the length of specimen in longitudinal direction is 1.5 times that of side length or diameter, generally test surface shall be through longitudinal axis of steel products(billet), and the last machine direction of test surface shall be perpendicular to bearing of trend of steel products(billet). Steel plate's test surface shall generally be 250mm in length, and width is equal to plate thickness.
GB/T 226-1991 is referred in:
* GB/T 699-1999 Quality carbon structural steels
*GB 3087-1999 Seamless Steel Pipes for Low and Medium Pressure Boiler
*GB/T 3077-1999 Alloy Structure Steels
*DL/T 715-2000 Selection guidelines for the metallic material of fossil -- fired power plants
*GB 19158-2003 Steel cylinders for the storage of compressed natural gas
*GB/T 1299-2000 Alloy tool steels
*GB/T 6478-2001 Steels for cold heading and cold extruding
Code of China
Standard
GB/T 226-1991  Etch test for macrostructure and defect of steels (English Version)
Standard No.GB/T 226-1991
Statussuperseded
LanguageEnglish
File FormatPDF
Word Count2000 words
Price(USD)184.0
Implemented on1992-3-1
Deliveryvia email in 1 business day
Detail of GB/T 226-1991
Standard No.
GB/T 226-1991
English Name
Etch test for macrostructure and defect of steels
Chinese Name
钢的低倍组织及缺陷酸蚀检验法
Chinese Classification
Professional Classification
GB
ICS Classification
Issued by
State Bureau of Technical Supervision
Issued on
1991-06-22
Implemented on
1992-3-1
Status
superseded
Superseded by
GB/T 226-2015 Test method for macrostructure and defect of steel by etching
Superseded on
2016-6-1
Abolished on
Superseding
Language
English
File Format
PDF
Word Count
2000 words
Price(USD)
184.0
Keywords
GB/T 226-1991, GB 226-1991, GBT 226-1991, GB/T226-1991, GB/T 226, GB/T226, GB226-1991, GB 226, GB226, GBT226-1991, GBT 226, GBT226
Introduction of GB/T 226-1991
This standard refers to the International Standard ISO 4969-1980 "Steel-Macroscopic Examination by Etching with Strong Mineral Acids". 1. Subject Content and Application Scope This national standard specifies the inspection for the hot and cold acid etch and electric erosion method of the steel’s macrostructure and defects. This standard is applicable to inspection of steel's macrostructure and defect. Arbitrating inspection shall be subject to hot acid etching method is there is no specific requirements on technical condition. 2. Specimen 2.1 Specimen Intercept Specimen intercept's position, quantity and test condition shall be conducted according to relevant standard, technical condition or requirements in mutual agreement. In case of no requirements, take two specimens from the steel products (billet) according to melting (batch) number. Manufacturing plant shall sample from the most severe defect position, generally intercepting the header of the equivalent first and last panel (branch) of steel ingot. As to continuous casting blank, intercepting a piece of specimen from the first billet after adjusting continuous casting drawing speed, according to melting (batch) number.. 2.2 Sampling Method Use methods such as cut, saw and cutting to sample. When processing the specimen, remove manufacturing deficiency such as deformation and heat-affected zone as well as crack, which is caused by sampling. After processing, surface roughness of test surface shall be not larger than 1.6μm, cold acid etching method not larger than 0.8μm, test surface is no oily soil and processing scratches, if necessary take pre-cleaning. The reference dimension between test surface and cut surface is: a. Hot cutting not less than 20mm; b. Cold cutting not less than 10mm; c. Burning not less than 40mm. 2.3 Sample Size Generally thickness of transverse test-piece is 20mm; test surface shall be perpendicular to bearing of trend of steel products (billet). generally the length of specimen in longitudinal direction is 1.5 times that of side length or diameter, generally test surface shall be through longitudinal axis of steel products(billet), and the last machine direction of test surface shall be perpendicular to bearing of trend of steel products(billet). Steel plate's test surface shall generally be 250mm in length, and width is equal to plate thickness.
Contents of GB/T 226-1991
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Keywords:
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