SAE AMS 5641J-2021

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For more information on this standard, visit

https://www.sae.org/standards/content/AMS5641J

AEROSPACE

MATERIAL SPECIFICATION

AMS5641™

REV. J

Issued 1942-06

Reaffirmed 2000-08

Revised 2021-10

Superseding AMS5641H

Steel, Corrosion-Resistant, Bars, Wire, Forgings and Forging Stock

18.5Cr - 10Ni - 0.22Se (303Se)

Free-Machining; for Swaging or Upsetting

Solution Heat Treated

(Composition similar to UNS S30323)

RATIONALE

AMS5641J is the result of a Five-Year Review and update of the specification. The revision updates the title to match the

scope and application, prohibits unauthorized exceptions (3.6, 4.4.4, 5.2.1.1, 8.7, deletes 8.8) updates composition testing

(3.1), updates classification of tests (4.2), adds cold finished (3.2.1.2), adds strain rate control (3.3.1.1), adds AS1182 (3.4.2,

8.5), and allows prior revisions (8.6).

1. SCOPE

1.1 Form

This specification covers a free-machining, corrosion-resistant steel in the form of bars, wire, forgings, and forging stock.

1.2 Application

These products have been used typically for parts which may be swaged or hot upset during fabrication and on which the

amount of machining warrants use of a free-machining grade of steel, but usage is not limited to such applications. Corrosion

resistance is similar to that of the standard 18-8 type steel.

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.

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

AMS2248 Chemical Check Analysis Limits, Wrought Corrosion and Heat-Resistant Steels and Alloys, Maraging and

Other Highly-Alloyed Steels, and Iron Alloys

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SAE INTERNATIONAL AMS5641™J Page 2 of 6

AMS2371 Quality Assurance Sampling and Testing, Corrosion and Heat-Resistant Steels and Alloys, Wrought

Products and Forging Stock

AMS2374 Quality Assurance Sampling and Testing, Corrosion and Heat-Resistant Steel and Alloy Forgings

AMS2806 Identification Bars, Wire, Mechanical Tubing, and Extrusions, Carbon and Alloy Steels and Corrosion and

Heat-Resistant Steels and Alloys

AMS2808 Identification Forgings

ARP1917 Clarification of Terms Used in Aerospace Metals Specifications

AS1182 Standard Stock Removal Allowance Aircraft-Quality and Premium Aircraft-Quality Steel Bars and

Mechanical Tubing

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 A370 Mechanical Testing of Steel Products

ASTM A751 Chemical Analysis of Steel Products

ASTM E140 Conversion Tables for Metals Relationship Among Brinell Hardness, Vickers Hardness, Rockwell

Hardness, Superficial Hardness, Knoop Hardness, Scleroscope Hardness, and Leeb Hardness

3. TECHNICAL REQUIREMENTS

3.1 Composition

Shall conform to the following percentages by weight as shown in Table 1, determined in accordance with ASTM A751 or

other analytical methods approved by purchaser:

Table 1 - Composition

Element

Min

Max

Carbon

Manganese

Silicon

Phosphorus

Sulfur

Chromium

Nickel

Selenium

Molybdenum

Copper

0.11

17.00

8.00

0.15

0.12

2.00

0.70

0.17

0.040

20.00

12.00

0.30

0.75

3.1.1 Check Analysis

Composition variations shall meet the applicable requirements of AMS2248.

3.2 Condition

The product shall be supplied in the following condition:

3.2.1 Bars, Wire, and Forgings

Solution heat treated free from continuous carbide network.

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SAE INTERNATIONAL AMS5641™J Page 3 of 6

3.2.1.1 All hexagons, other bars 2.75 inches (69.8 mm) and under in nominal diameter or distance between parallel sides,

and wire shall be cold finished.

3.2.1.2 Bars, other than hexagons, over 2.75 inches (69.8 mm) in nominal diameter or distance between parallel sides

shall be hot finished or cold finished.

3.2.1.3 Bars shall not be cut from plate (also see 4.4.2).

3.2.2 Forging Stock

As ordered by the forging manufacturer.

3.3 Properties

Bars, wire, and forgings shall conform to the following requirements; hardness and tensile testing shall be performed in

accordance with ASTM A370.

3.3.1 Tensile Properties

Shall be as shown in Table 2:

Table 2 - Tensile properties

Property

Value

Tensile Strength

75.0 to 115 ksi (517 to 793 MPa)

Elongation in 4D, minimum

35%

3.3.1.1 Unless otherwise specified, the strain rate shall be set at 0.005 in/in/min (0.005 mm/mm/min) and maintained

within a tolerance of ±0.002 in/in/min (0.002 mm/mm/min) through 0.2% offset yield strain. The strain rate after

yield may be increased to any value up to 0.5 in/in/min (or 0.5 mm/mm/min) or equivalent crosshead speed as a

function of gage length.

3.3.1.2 Elongation requirements apply only to bars and wire 0.125 inch (3.18 mm) and over in nominal diameter or

distance between parallel sides.

3.3.1.3 Elongation requirements for bars and wire outside the size range of 3.3.1.2 shall be agreed upon between

purchaser and producer.

3.3.2 Hardness

3.3.2.1 Bars

Shall be as shown in Table 3, or equivalent (see 8.2), determined at approximate mid-radius or quarter thickness.

Table 3 - Hardness of bars

Nominal Diameter or Distance

Between Parallel Sides

Inches

Nominal Diameter or Distance

Between Parallel Sides

Millimeters

Brinell

Hardness

Min

Brinell

Hardness

Max

Up to 2.00, incl

Up to 50.8, incl

140

255

Over 2.00

Over 50.8

255

3.3.2.2 Forgings

Shall be not higher than 187 HB, or equivalent (see 8.2).

3.3.2.3 Properties of forging stock shall be as agreed upon by purchaser and producer.

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摘要：

SAE AMS 5641J-2021 是一项由国际自动机工程师学会发布的最新版本航空航天材料规范，针对耐腐蚀的优质不锈钢棒材、线材及型材提出统一的技术要求。该标准主要适用于 17Cr-4Ni 型（如 17-4PH）马氏体沉淀硬化不锈钢，明确了材料的化学成分、力学性能、热处理工艺、耐腐蚀性能及检验方法。SAE AMS 5641J 旨在确保材料在极端环境下的高强度和良好韧性，广泛应用于飞机结构件、发动机部件、紧固件及液压系统等关键领域。与旧版相比，2021 年更新版本进一步细化了生产与验收流程，增强

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