SAE AMS 4907M-2020

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For more information on this standard, visit

https://www.sae.org/standards/content/AMS4907M/

AEROSPACE

MATERIAL SPECIFICATION

AMS4907™

REV. M

Issued 1965-09

Revised 2020-08

Superseding AMS4907L

Titanium Alloy, Sheet, Strip, and Plate

6.0Al - 4.0V, Extra Low Interstitial

Annealed

(Composition similar to UNS R56401)

RATIONALE

AMS4907M results from a Five-Year Review and update of this specification that revises yttrium requirement (Table 1),

updates unauthorized exceptions (3.5.1.1, 3.9, 8.6), and allows for lower temperature for notched/unnotched tensile ratio

determination (3.5.3).

1. SCOPE

1.1 Form

This specification covers a titanium alloy in the form of sheet, strip, and plate on product 0.008 to 3.000 inches (0.20 to

76.20 mm), inclusive in thickness.

1.2 Application

These products have been used typically for parts requiring a combination of weldability, ductility, and good notch-toughness

down to -423 °F (-253 °C), but usage is not limited to such applications.

1.3 Certain processing procedures and service conditions may cause these products to become subject to

stress-corrosion cracking; ARP982 recommends practices to minimize such conditions.

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 AMS4907™M Page 2 of 10

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.

AMS2242 Tolerances, Corrosion and Heat Resistant Steel, Iron Alloy, Titanium, and Titanium Alloy Sheet, Strip,

and Plate

AMS2249 Chemical Check Analysis Limits, Titanium and Titanium Alloys

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

AMS2631 Ultrasonic Inspection, Titanium and Titanium Alloy Bar, Billet and Plate

AMS2750 Pyrometry

AMS2809 Identification, Titanium and Titanium Alloy Wrought Products

ARP982 Minimizing Stress-Corrosion Cracking in Wrought Titanium Alloy Products

ARP1917 Clarification of Terms Used in Aerospace Metals Specifications

AS1814 Terminology for Titanium Microstructures

AS4194 Sheet and Strip Surface Finish Nomenclature

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 A480/A480M General Requirements for Flat-Rolled Stainless and Heat-Resisting Steel Plate, Sheet, and Strip

ASTM E8/E8M Tension Testing of Metallic Materials

ASTM E290 Bend Testing of Material for Ductility

ASTM E384 Microindentation Hardness of 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 Atomic

Emission Spectrometry

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

Discharge Atomic Emission Spectrometry

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SAE INTERNATIONAL AMS4907™M Page 3 of 10

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

Vanadium

Iron

Oxygen

Carbon

Nitrogen

Hydrogen

Yttrium

(3.1.1)

Other Elements, each (3.1.1)

Other Elements, total (3.1.1)

Titanium

5.50

3.50

remainder

6.50

4.50

0.25

0.13

0.08

0.05 (500 ppm)

0.0125 (125 ppm)

0.005 ( 50 ppm)

0.10

0.30

3.1.1 Determination not required for routine acceptance.

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 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 Sheet and Strip

Hot rolled with or without subsequent cold reduction, annealed, descaled, and leveled, having a surface appearance

comparable to a commercial corrosion-resistant steel No. 2D finish (see 8.2).

3.3.2 Plate

Hot rolled, annealed, descaled, and flattened, having a surface appearance comparable to a No. 1 finish (see 8.2). Plate

product shall be produced using standard industry practices designed strictly for the production of plate stock to the procured

thickness. Bar, billet, forgings, or forging stock shall not be supplied in lieu of plate.

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摘要：

SAE AMS 4907M-2020 是航空航天材料规范（AMS）标准的最新版本，专门针对用于飞机结构及高温环境下的钛合金薄板、带材和厚板材料。该标准由国际自动机工程师学会（SAE International）发布，规定了钛-6铝-4钒合金（Ti-6Al-4V）在退火状态下的化学成分、力学性能、显微组织、热处理工艺及检验测试要求。与原版本相比，AMS 4907M 在修订中更新了材料缺陷判定标准、细化了对拉伸强度和延伸率的技术指标，并增加了更严格的无损检测频次，以确保材料在航空发动机、机身蒙皮及关

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