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GB/T 3849.2-2010 English PDF

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US$174.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB/T 3849.2-2010: Hard metals -- Rockwell hardness test (scale A) -- Part 2: Preparation and calibration of standard test blocks
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 3849.2-2010	174	Add to Cart	3 days	Hard metals -- Rockwell hardness test (scale A) -- Part 2: Preparation and calibration of standard test blocks	Valid

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Basic data

Standard ID: GB/T 3849.2-2010 (GB/T3849.2-2010)
Description (Translated English): Hard metals -- Rockwell hardness test (scale A) -- Part 2: Preparation and calibration of standard test blocks
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: H16
Classification of International Standard: 77.160
Word Count Estimation: 9,953
Date of Issue: 2011-01-14
Date of Implementation: 2011-11-01
Quoted Standard: GB/T 3849
Adopted Standard: ISO 3738-2-1988, IDT
Regulation (derived from): National Standard Approval Announcement 2011 No.2
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 standard provides for the correction by the Rockwell hardness machine (A scale) and head of the parent standard test and calibration carbide blocks each turn a standard test block, two blocks and work standard test standard test block.

GB/T 3849.2-2010: Hard metals -- Rockwell hardness test (scale A) -- Part 2: Preparation and calibration of standard test blocks

---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.
Hardmetals.Rockwell hardness test (scale A) .Part 2. Preparation and calibration of standard test blocks ICS 77.160 H16 National Standards of People's Republic of China Carbide Rockwell hardness test (A scale) Part 2. Preparation and calibration of standard test blocks Hardmetals-Rockwelhardnesstest (scaleA) Part 2. Preparationandcalibrationofstandardtestblocks (ISO 3738-2. 1988, IDT) 2011-01-14 release 2011-11-01 implementation General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China China National Standardization Management Committee released

Foreword

This part is drafted in accordance with the rules given in GB/T 1.1-2009. This part uses the translation method equivalent to ISO 3738-2. 1988 "Carbide Rockwell Hardness Test (A scale) Part 2. Standard Quasi-test block preparation and calibration. " This part is the national nonferrous Metals Standardization Technical Committee (SAC/TC243). This part of the drafting unit. Xiamen Jinlu Special Alloy Co., Ltd., the national tungsten materials engineering technology research center. The main drafters of this part are. Zou Jianping, Xiao Manduo, Lin Chenshu, Wu Chonghu, Wu Qishan, Sun Xiaoyu, Wu Gaochao, Huang Jiaming, Xie Yifeng, Wenxiao, Sun Dongping. Carbide Rockwell hardness test (A scale) Part 2. Preparation and calibration of standard test blocks

1 Scope

This part of GB/T 3849 specifies the preparation and calibration of the standard test block for calibration of Rockwell hardness (A scale) and indenter A standard test piece, a standard test block and a working standard block.

2 normative reference documents

The following documents are indispensable for the application of this document. For dated references, only the dated edition applies to this article Pieces. For undated references, the latest edition (including all modifications) applies to this document. GB/T 3849 Carbide Hardness (A scale) Test Method 1) 1) The standard will be revised and renumbered as GB/T 3849.1.

3 symbols and definitions

Table 1 Symbol definition Standard deviation of the hardness value of the first - level standard test block Standard deviation of hardness determination values on the test surface of a standard test block Average standard deviation of hardness measurement on SP standard block The standard deviation shall be calculated according to formula (1). S = 1n-1Σ i = 1 (xi-x) 2 (1)

4 standard test block preparation

4.1 All standard test pieces are basically made of tungsten carbide and cobalt, no other carbides or other carbonates less than 1% by mass (mass fraction) (Such as titanium, tantalum, niobium carbide) composed of cemented carbide. The selected composition and structure should meet the required hardness. No free carbon And η phase. 4.2 standard test block of the nominal diameter of 45mm, nominal thickness of 8mm. The bottom should be chamfered 0.8mm into 45 ° chamfer. 4.3 The two planes of each standard test block should be flattened. The surface roughness Ra of the indentation surface should be ≤ 0.2 μm and polishing can be performed. The maximum deviation of the surface flatness should not exceed 0.010mm. The bottom of the test piece should not be convex. The maximum deviation of the parallelism every 50mm should not More than 0.020mm. ......

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Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of GB/T 3849.2-2010_English be delivered?

Answer: Upon your order, we will start to translate GB/T 3849.2-2010_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 3 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of GB/T 3849.2-2010_English with my colleagues?

Answer: Yes. The purchased PDF of GB/T 3849.2-2010_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.

Question 3: Does the price include tax/VAT?

Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countries

Question 4: Do you accept my currency other than USD?

Answer: Yes. If you need your currency to be printed on the invoice, please write an email to Sales@ChineseStandard.net. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.