ISO 21334:2022

INTERNATIONAL ISO
STANDARD 21334
First edition
2022-10
Titanium and titanium alloys — Strip
for welded tubes — Technical delivery
conditions
Reference number
© ISO 2022
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ii
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Information to be supplied by the purchaser . 2
4.1 General information. 2
4.2 Options. 2
5 Manufacturing . 3
6 Requirements . 3
6.1 General . 3
6.2 Chemical composition . 3
6.3 Tensile properties . 5
6.4 Bend test . 5
6.5 Dimensional tolerance . 6
6.5.1 Tolerance of thickness . 6
6.5.2 Tolerance of width . 6
6.5.3 Tolerance of burr height . . 7
6.5.4 Tolerance of wave . 7
6.5.5 Tolerance of camber . 7
6.6 Surface conditions, imperfections and defects . 8
6.7 Finish . 8
7 Inspection . 8
7.1 Types of inspection and inspection documents . 8
7.1.1 General . 8
7.1.2 Inspection documents . 8
7.2 Specific inspection . 8
7.2.1 General . 8
7.2.2 Samples and test pieces for chemical composition and mechanical tests or
product analysis . 9
8 Rounding-off procedure. 9
9 Reference test and analysis . 9
10 Rejection .10
11 Marking . .10
11.1 General . 10
11.2 Strip marking . 10
12 Packaging.10
13 Quality assurance .10
Annex A (normative) Additional requirements for strips for welded rolled tubes for heat
exchanger or condenser .11
Bibliography .12
iii
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
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ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www.iso.org/patents).
Any trade name used in this document is information given for the convenience of users and does not
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www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 79, Light metals and their alloys,
Subcommittee SC 11, Titanium.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.
iv
Introduction
This document was developed in response to worldwide demand for stabilizing the quality assurance
for the strip for welded tubes by common regulations worldwide.
Determining condition concerning such technical delivery conditions for strips of titanium and
titanium alloys used for welded tubes as chemical composition, mechanical properties and dimensional
tolerance is extremely important to promote commerce of titanium and titanium alloys products in the
global market.
The International Organization for Standardization (ISO) draws attention to the fact that it is claimed
that compliance with this document may involve the use of patents concerning the titanium alloys given
in Tables 1 and 2.
ISO takes no position concerning the evidence, validity and scope of these patent rights.
The holders of these patent rights have assured ISO that they are willing to negotiate licences under
reasonable and non-discriminatory terms and conditions with applicants throughout the world. In this
respect, the statement of the holders of these patent rights is registered with ISO. Information may be
obtained from the patent database available at www.iso.org/patents.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights other than those in the patent database. ISO shall not be held responsible for identifying
any or all such patent rights.
v
INTERNATIONAL STANDARD ISO 21334:2022(E)
Titanium and titanium alloys — Strip for welded tubes —
Technical delivery conditions
1 Scope
This document specifies general requirements for the manufacture and technical delivery conditions of
strips made from titanium and titanium alloys for welded tubes.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 377, Steel and steel products — Location and preparation of samples and test pieces for mechanical
testing
ISO 6892-1, Metallic materials — Tensile testing — Part 1: Method of test at room temperature
ISO 7438, Metallic materials — Bend test
ISO 9712, Non-destructive testing — Qualification and certification of NDT personnel
ISO 10474, Steel and steel products — Inspection documents
ISO 28401, Light metals and their alloys — Titanium and titanium alloys — Classification and terminology
ASTM E8/E8M, Standard Test Methods for Tension Testing of Metallic Materials
ASTM E539, Standard Test Method for Analysis of Titanium Alloys by Wavelength Dispersive X-Ray
Fluorescence Spectrometry
ASTM E1409, Standard Test Method for Determination of Oxygen and Nitrogen in Titanium and Titanium
Alloys by Inert Gas Fusion
ASTM E1447, Standard Test Method for Determination of Hydrogen in Titanium and Titanium Alloys by
Inert Gas Fusion Thermal Conductivity/Infrared Detection Method
ASTM E1941, Standard Test Method for Determination of Carbon in Refractory and Reactive Metals and
Their Alloys by Combustion Analysis
ASTM E2371, Standard Test Method for Analysis of Titanium and Titanium Alloys by Direct Current Plasma
and Inductively Coupled Plasma Atomic Emission Spectrometry (Performance-Based Test Methodology)
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 28401 and the following apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
3.1
strip
flat rolled product of rectangular cross-section with uniform thickness of 0,30 mm or more and less
than 4,5 mm supplied in coils usually with slit edges with width of 20 to 610 mm
Note 1 to entry: The thickness does not exceed one-tenth of the width.
3.2
burr height
deformation height raised by slitting at the edges of the strip
3.3
wave
ratio of the wave height (H) for the suitable length (L) of the length of the strip in the longitudinal
direction
Note 1 to entry: H is the maximum height difference between the peak and valley of the wave in the longitudinal
direction of the strip.
Note 2 to entry: L is the arbitrary length of periodic distortion or arbitrary length of localized distortion.
3.4
camber
maximum horizontal curve between a reference line of 2 000 mm long placed between any two points
on the cut edge of the strip
3.5
lot
set of products with the same nominal size produced with the same ingot, processing, heat treatment
and chemical treatment
4 Information to be supplied by the purchaser
4.1 General information
The purchase order shall include the following information:
a) quantity (e.g. total mass or total length of the strip);
b) designation;
c) thickness and width;
d) packaging;
e) inspection;
f) certification.
4.2 Options
A number of options are specified in this document:
a) restrictive chemistry (see 6.2);
b) product analysis (see 6.2);
c) special mechanical properties (see 6.3 and 6.4);
d) special tolerance (see 6.5);
e) method of manufacture and finish (see Clause 5 and 6.6).
In the event that the purchaser does not indicate a wish to implement any of these options at the time of
enquiry and order, the strip shall be supplied in accordance with the basic specification.
5 Manufacturing
The strip shall be manufactured by cold-rolling of the hot-stripped mill product followed by the
appropriate surface conditioning and heat treatment. The strip shall be edge-cut by slitting in the
requested width.
6 Requirements
6.1 General
When supplied in the delivery condition indicated in 4.1 and inspected in accordance with Clause 6, the
strip shall conform to the requirements of this document.
6.2 Chemical composition
The titanium and titanium alloys strip shall conform to the chemical requirements given in Table 1.
The elements listed in Table 1 are either intentional alloy additions or elements that are inherent to the
manufacture of titanium sponge, ingot or mill product.
The content of any element intentionally added to the formulation of heat shall be reported.
Other elements are those not specified in the relevant designated material, such as Cr and Mo of Ti1-
0,18Pd, and those not originally specified in Table 1, such as Co and Hf. The choice of element taken as
the other element shall be agreed between the purchaser and the manufacturer.
Other elements need not be reported u
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