SAE AMS 4953H-2019

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http://standards.sae.org/AMS4953H

AEROSPACE

MATERIAL SPECIFICATION

AMS4953™

REV. H

Issued 1958-03

Revised 2019-11

Superseding AMS4953G

Titanium Alloy Welding Wire

5Al - 2.5Sn

(Composition similar to UNS R54520)

RATIONALE

AMS4953H results from a Five-Year Review and update of this specification that adds analytical methods (3.1) and prohibits

unauthorized exceptions (3.8, 4.4.2, and 5.1).

1. SCOPE

1.1 Form

This specification covers a titanium alloy in the form of welding wire.

1.2 Application

This wire has been used typically for gas-metal-arc and gas-tungsten-arc welding, but usage is not limited to such

applications.

2. APPLICABLE DOCUMENTS

The issue of the following documents in effect on the date of the purchase order forms a part of this specification to the

extent specified herein. The supplier may work to a subsequent revision of a document unless a specific document issue is

specified. When the referenced document has been cancelled and no superseding document has been specified, the last

published issue of that document shall apply.

2.1 SAE Publications

Available from SAE International, 400 Commonwealth Drive, Warrendale, PA 15096-0001, Tel: 877-606-7323 (inside USA

and Canada) or +1 724-776-4970 (outside USA), www.sae.org.

AMS2249 Chemical Check Analysis Limits, Titanium and Titanium Alloys

AMS2813 Packaging and Marking of Packages of Welding Wire, Standard Method

AMS2814 Packaging and Marking of Packages of Welding Wire, Premium Quality

AMS2816 Identification, Welding Wire, Tab Marking Method

AMS2819 Identification, Welding Wire, Direct Color Code System

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SAE INTERNATIONAL AMS4953™H Page 2 of 7

ARP1876 Weldability Test for Weld Filler Metal Wire

ARP1917 Clarification of Terms Used in Aerospace Metals Specifications

ARP4926 Alloy Verification and Chemical Composition Inspection of Welding Wire

2.2 ASTM Publications

Available from ASTM International, 100 Barr Harbor Drive, P.O. Box C700, West Conshohocken, PA 19428-2959,

Tel: 610-832-9585, www.astm.org.

ASTM E539 Analysis of Titanium Alloys by X-Ray Fluorescence Spectrometry

ASTM E1409 Determination of Oxygen and Nitrogen in Titanium and Titanium Alloys by Inert Gas Fusion

ASTM E1447 Determination of Hydrogen in Titanium and Titanium Alloys by the Inert Gas Fusion Thermal

Conductivity/Infrared Detection Method

ASTM E1941 Determination of Carbon in Refractory and Reactive Metals and Their Alloys by Combustion Analysis

ASTM E2371 Analysis of Titanium and Titanium Alloys by Direct Current Plasma and Inductively Coupled Plasma Atomic

Emission Spectrometry

ASTM E2994 Analysis of Titanium and Titanium Alloys by Spark Atomic Emission Spectrometry and Glow Discharge

Atomic Emission Spectrometry

3. TECHNICAL REQUIREMENTS

3.1 Composition

Shall conform to the percentages by weight shown in Table 1; carbon shall be determined in accordance with ASTM E1941,

hydrogen in accordance with ASTM E1447, oxygen and nitrogen in accordance with ASTM E1409, and other elements in

accordance with ASTM E539, ASTM E2371 or ASTM E2994. Other analytical methods may be used if acceptable to the

purchaser.

Table 1 - Composition

Element

Min

Max

Aluminum

4.50

5.75

Tin

2.00

3.00

Iron

0.50

Oxygen (3.1.1.1)

0.175

Carbon (3.1.1.1)

0.08

Nitrogen (3.1.1.1)

0.05

Hydrogen (3.1.1.1)

0.015

(150 ppm)

Yttrium (3.1.1.2)

0.005

( 50 ppm)

Other Elements, each (3.1.1.2)

0.10

Other Elements, total (3.1.1.2)

0.40

Titanium

remainder

3.1.1 Except for carbon, oxygen, nitrogen, and hydrogen, chemical analysis of initial ingot, bar, or rod stock before

drawing is acceptable provided the processes used for drawing or rolling, annealing, and cleaning are controlled to

ensure continued conformance to composition requirements.

3.1.1.1 Carbon, oxygen, nitrogen, and hydrogen shall also be determined on each lot of finished wire.

3.1.1.2 Determination not required for routine acceptance.

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SAE INTERNATIONAL AMS4953™H Page 3 of 7

3.1.2 Check Analysis

Composition variations shall meet the applicable requirements of AMS2249.

3.2 Melting Practice

Alloy shall be multiple melted. The first melt shall be made by vacuum consumable electrode, nonconsumable electrode,

electron beam cold hearth, or plasma arc cold hearth melting practice. The subsequent melt or melts shall be made using

vacuum arc remelting (VAR) practice. Alloy additions are not permitted in the final melt cycle.

3.2.1 The atmosphere for nonconsumable electrode melting shall be vacuum or shall be inert gas at a pressure not higher

than 1000 mm of mercury.

3.2.2 The electrode tip for nonconsumable electrode melting shall be water-cooled copper.

3.3 Condition

Cold drawn, bright finish, in a temper and with a surface finish that will provide proper feeding of the wire in machine welding

equipment.

3.4 Fabrication

3.4.1 Wire shall be formed from rod or bar descaled by a process that does not affect the composition of the wire. Surface

irregularities inherent with a forming process that does not tear the wire surface are acceptable provided the wire

conforms to the tolerances of 3.7.

3.4.2 In-process annealing, if required between rolling or drawing operations, shall be performed in a vacuum or in a

protective atmosphere to avoid surface oxidation and adsorption of other extraneous elements. Material shall have

been chemically or mechanically cleaned prior to annealing.

3.4.3 Butt welding is permissible only at diameters larger than final finished product size provided both ends to be joined

are either alloy verified using a method or methods capable of distinguishing the alloy from all other alloys processed

within the facility, or the repair is made at the wire processing station. The butt weld shall not interfere with the

uniform, uninterrupted feeding of the wire in machine welding equipment.

3.4.4 Drawing compounds, oxides, dirt, oil, and other foreign materials shall be removed by cleaning processes which

will neither result in pitting, nor cause gas absorption by the wire or deposition of substances harmful to welding

operations.

3.4.5 Surface contaminants or dissolved gasses picked up during wire processing that can adversely affect the welding

characteristics, the operation of the equipment, or the properties of the weld metal, shall be removed.

3.5 Properties

Wire shall conform to the following requirements:

3.5.1 Weldability

Melted wire shall flow smoothly and evenly during welding and shall produce acceptable welds. ARP1876 may be used to

resolve disputes.

3.5.2 Spooled Wire

Shall conform to 3.5.2.1, 3.5.2.2, and 3.5.2.3.

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摘要：

SAE AMS 4953H-2019 是一项由美国汽车工程师学会（SAE）发布的最新修订版航空航天材料规范，专门针对钛合金（Ti-5Al-2.5Sn）的冷拉钢丝产品。该标准规定了用于航空发动机、机身结构件及高温紧固件等关键应用的钛合金钢丝的化学成分、力学性能、工艺要求及检验方法。版本H相较于以往版本，更新了材料的热处理工艺参数和验收标准，以确保在极端工况下的疲劳强度和耐腐蚀性能。适用于航空航天、国防及高性能工业领域的工程采购与质量认证，是相关制造商与供应商进行材料选型、质量控制及合规评估的重要参

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