SAE AMS 4926P-2019

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AEROSPACE

MATERIAL SPECIFICATION

AMS4926™

REV. P

Issued 1958-03

Revised 2019-06

Superseding AMS4926N

Titanium Alloy, Bars, Wire, and Rings

5Al - 2.5Sn

Annealed, 110 ksi (758 MPa) Yield Strength

(Composition similar to UNS R54520)

RATIONALE

AMS4926P results from a Five-Year Review and update of this specification that revises composition analytical methods

(3.1), prohibits unauthorized exceptions (3.9), and revises reporting (4.4) and identification (5.1.1).

1. SCOPE

1.1 Form

This specification covers a titanium alloy in the form of bars, wire, flash welded rings 4.000 inches (101.60 mm) and under

in nominal diameter or least distance between parallel sides and 16 in2 (103 cm2) and under in cross-sectional area, and

stock of any size for flash welded rings.

1.2 Application

These products have been used typically for parts requiring strength up to 800 °F (427 °C) and which may be welded during

fabrication, 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.

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SAE INTERNATIONAL AMS4926™P Page 2 of 8

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.

AMS2241 Tolerances, Corrosion and Heat-Resistant Steel, Iron Alloy, Titanium, and Titanium Alloy Bars and Wire

AMS2249 Chemical Check Analysis Limits, Titanium and Titanium Alloys

AMS2368 Sampling and Testing of Wrought Titanium Raw Material Except Forgings and Forging Stock

AMS2750 Pyrometry

AMS2809 Identification Titanium and Titanium Alloy Wrought Products

AMS7498 Rings, Flash Welded, Titanium and Titanium Alloys

ARP1917 Clarification of Terms Used in Aerospace Metals Specifications

AS6279 Standard Practice for Production, Distribution, and Procurement of Metal Stock

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 E8/E8M Tension Testing of Metallic Materials

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 2994. Other analytical methods may be used if acceptable to the

purchaser.

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SAE INTERNATIONAL AMS4926™P Page 3 of 8

Table 1 - Composition

Element

Min

Max

Aluminum

Tin

Iron

Oxygen

Carbon

Nitrogen

Hydrogen

Yttrium (3.1.1)

Other Elements, each (3.1.1)

Other Elements, total (3.1.1)

Titanium

4.00

2.00

remainder

6.00

3.00

0.50

0.20

0.08

0.05

0.020

0.005

0.10

0.40

(500 ppm)

(200 ppm)

( 50 ppm)

3.1.1 Determination not required for routine acceptance.

3.1.2 Check Analysis

Composition variations shall meet the 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 argon and/or helium at an

absolute 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

The product shall be supplied in the following condition:

3.3.1 Bars

Hot finished with or without subsequent cold reduction, annealed, and descaled. Bar shall be processed to the final

thickness/diameter by metallurgical working operations prior to any straightening, dimensional sizing or surface finishing

operations. Bar shall not be cut from plate.

3.3.2 Wire

Cold drawn, annealed, and descaled.

3.3.3 Flash Welded Rings

Fabricated in accordance with AMS7498, annealed, and descaled.

3.3.4 Stock for Flash Welded Rings

As ordered by the flash welded ring manufacturer.

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摘要：

SAE AMS 4926P-2019 是美国汽车工程师学会（SAE）发布的航空航天材料规范，主要针对退火状态的钛合金棒材、线材及锻件（典型牌号为Ti-6Al-4V）。该标准规定了材料的化学成分、力学性能、热处理要求、检验程序及验收标准，适用于航空航天结构中高强度和耐腐蚀性要求的关键部件。作为AMS 4926系列的最新修订版本，P版更新了检测要求和质量控制条款，以提升材料的一致性与可靠性。该标准对于航空制造、军工及高端工业领域的材料采购、质量认证及合规性审查具有重要参考价值，是确保钛合金产品满足严

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