GB/T 39985-2021 PDF English
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| GB/T 39985-2021 | English | 170 |
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Titanium-nickel shape memory alloy plate
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GB/T 39985-2021: Titanium-nickel shape memory alloy plate---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT39985-2021
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 77.150.50
CCS H 64
Titanium-nickel shape memory alloy plate
ISSUED ON: MAY 21, 2021
IMPLEMENTED ON: DECEMBER 01, 2021
Issued by: State Administration for Market Regulation;
Standardization Administration of the PRC.
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative references ... 4
3 Terms and definitions ... 5
4 Technical requirements ... 5
5 Test methods ... 9
6 Inspection rules ... 10
7 Marking, packing, transporting, storing ... 11
8 Order form content ... 13
Titanium-nickel shape memory alloy plate
1 Scope
This document specifies the technical requirements, test methods, inspection
rules, marking, packing, transporting, storing, accompanying documents and
order form content for titanium-nickel shape memory alloy plate.
This document is applicable to the titanium-nickel shape memory alloy plate
used for making spectacle frames, orthopedic implants, springs, etc.
2 Normative references
The contents of the following documents, through normative references in this
text, constitute indispensable provisions of this document. Among them, for
dated references, only the edition corresponding to that date applies to this
document. For undated references, the latest edition (including all amendments)
applies to this document.
GB/T 228.1-2010 Metallic materials - Tensile testing - Part 1: Method of test
at room temperature
GB/T 3620.2 Titanium and titanium alloys - Permissible variations of
chemical composition for wrought product analysis
GB/T 4698 (all parts) Methods for chemical analysis of titanium sponge,
titanium and titanium alloys
GB/T 5168 Microstructure and macrostructure examination for titanium and
titanium alloys
GB/T 6394-2017 Determination of estimating the average grain size of metal
GB/T 8180 Wrought titanium and titanium alloy products packing, marking,
transporting and storing
GB/T 23614.1 Methods for chemical analysis of titanium nickel shape
memory alloy - Part 1: Determination of nickel content - Dimethylglyoxime
precipitate separation-EDTA complex-zinc chloride back titration
GB/T 23614.2 Chemical analysis methods for titanium nickel shape memory
alloy - Part 2: Determination of cobalt, copper, chromium, iron, niobium
content - Inductively coupled plasma atomic emission spectrometry
negotiation.
4.8 Appearance quality
4.8.1 Hot-rolled plates are allowed to be delivered with alkaline pickling,
sandblasting and sanding surfaces.
4.8.2 The surface of the plate is allowed to have slight darkening and local water
marks, as well as local defects such as scratches, indentations, and pits that
do not exceed the tolerances of its thickness. Cracks, peeling, oxide scale,
crushing, metal and non-metal inclusions, and traces of alkaline washing are
not allowed.
4.8.3 The plate allows local defects to be removed along the rolling direction.
However, the thickness of the plate after removal shall not be less than the
minimum allowable thickness.
4.8.4 There shall be no delamination in the plate.
5 Test methods
5.1 Chemical composition analysis: The analysis of nickel is carried out in
accordance with the provisions of GB/T 23614.1. The analysis of cobalt, copper,
chromium, iron and niobium is carried out in accordance with the provisions of
GB/T 23614.2. The analysis of the remaining elements is carried out in
accordance with the corresponding provisions of GB/T 4698.
5.2 The dimensions and shape are inspected using measuring tools of
corresponding accuracy.
5.3 The inspection of mechanical properties shall be carried out in accordance
with the provisions of GB/T 228.1-2010. For plates with a thickness of ≤3.0 mm,
select P1 samples. For plates with thickness >3.0 mm~6.0 mm, select P7
samples. For plates with thickness >6.0 mm~10.0 mm, select P8 samples. For
plates with a thickness of >10.0 mm, select R7 samples.
5.4 The average grain size shall be inspected in accordance with the provisions
of GB/T 6394-2017.
5.5 The microstructure and macrostructure shall be inspected in accordance
with the provisions of GB/T 5168.
5.6 The shape recovery temperature shall be inspected in accordance with the
provisions of YS/T 970 or YY/T 0641. The arbitration method shall be conducted
in accordance with the provisions of YY/T 0641.
Labels or plates shall be affixed to the products that have passed the inspection.
The following marks shall be indicated on them:
a) Product designation;
b) Lot number and supply state;
c) Product specifications;
d) Quantity and weight.
7.2 Packing, marking, transporting, storing and accompanying
documents
The packing, packing marking, transporting and storing of the product shall
comply with the provisions of GB/T 8180.
7.3 Accompanying documents
Each lot of products shall be accompanied by accompanying documents, which
shall include supplier information, product information, number of this document,
date of exit-factory or packing; and should also include:
a) Product quality assurance:
Main performance and technical parameters of the product;
Product characteristics (including the characteristics of manufacturing
process and raw materials);
Responsibility for product quality;
Quality certification obtained by the product and the results of various
analyses and inspections with the inspection seal of the technical
supervision department of the supplier.
b) Product conformity certificate:
Inspection items and their results or inspection conclusions;
Lot size or lot number;
Inspection date;
Inspector's signature or seal.
c) Inspection report and finished product inspection report during product
quality control.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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