SAE AMS 5569C-2021

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recording, or otherwise, without the prior written permission of SAE.

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Tel: +1 724-776-4970 (outside USA)

Fax: 724-776-0790

Email: CustomerService@sae.org

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For more information on this standard, visit

https://www.sae.org/standards/content/AMS5569C

AEROSPACE

MATERIAL SPECIFICATION

AMS5569™

REV. C

Issued 1993-07

Revised 2021-10

Superseding AMS5569B

Steel, Corrosion and Heat Resistant, Seamless and Welded Hydraulic Tubing

19Cr - 9.5Ni - 0.03C Max

Cold Drawn, 1/8 Hard Temper

(Composition similar to UNS S30403)

RATIONALE

AMS5569C is the result of a Five-Year Review and update of the specification. The revision prohibits unauthorized

exceptions (3.7, 4.4.1, 5.2.1, 8.5), updates composition testing (3.1), updates condition and fabrication requirements adding

AMS2700 (3.2, 3.3, deleting 3.4.5), updates tensile testing (3.4.1.2), updates hydrostatic testing consistent with other

committees (3.4), revises inspection (3.5, 4.2, 4.3), clarifies tolerances and identification (3.6, 5.2), requires country of origin

(4.4), adds definition (8.2.1), allows prior revisions (8.4), and is the result of a Five-Year Review and update of this

specification.

1. SCOPE

1.1 Form

This specification covers a corrosion and heat resistant steel in the form of two types of thin-wall, close-tolerance tubing

0.125 to 2.00 inches (3.18 to 50.8 mm), inclusive, in nominal OD.

1.2 Application

This tubing has been used typically in high pressure hydraulic or pneumatic systems assembled with brazed joints, but

usage is not limited to such applications.

1.3 Classification

The tubing covered by this specification is classified as follows:

Class 1 - Seamless and Drawn

Class 2 - Welded and Drawn

1.3.1 Unless a specific class is ordered, either class may be supplied.

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SAE INTERNATIONAL AMS5569™C Page 2 of 9

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.

AMS2243 Tolerances, Corrosion and Heat-Resistant Steel Tubing

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

Other Highly Alloyed Steels, and Iron Alloys

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

Wrought Products and Forging Stock

AMS2700 Passivation of Corrosion Resistant Steels

AMS2761 Heat Treatment of Steel Raw Materials

AMS2807 Identification, Carbon and Low-Alloy Steels, Corrosion and Heat-Resistant Steels and Alloys,

Sheet, Strip, Plate, and Aircraft Tubing

ARP1917 Clarification of Terms Used in Aerospace Metals Specifications

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 A262 Detecting Susceptibility to Intergranular Attack in Austenitic Stainless Steels

ASTM A370 Mechanical Testing of Steel Products

ASTM A751 Chemical Analysis of Steel Products

ASTM A1016/A1016M General Requirements for Ferritic Alloy, Austenitic Alloy Steel and Stainless Steel Tubes

ASTM E112 Determining Average Grain Size

ASTM E426 Electromagnetic (Eddy Current) Examination of Seamless and Welded Tubular Products,

Austenitic Stainless Steel and Similar Alloys

ASTM E1417/E1417M Liquid Penetrant Testing

2.3 ASME Publications

Available from ASME, P.O. Box 2900, 22 Law Drive, Fairfield, NJ 07007-2900, Tel: 800-843-2763 (U.S./Canada),

001-800-843-2763 (Mexico), 973-882-1170 (outside North America), www.asme.org.

ASME B46.1 Surface Texture

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SAE INTERNATIONAL AMS5569™C Page 3 of 9

3. TECHNICAL REQUIREMENTS

3.1 Composition

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

analytical methods acceptable to purchaser.

Table 1 - Composition

Element

Min

Max

Carbon

Manganese

Silicon

Phosphorus

Sulfur

Chromium

Nickel

Molybdenum

Copper

18.0

8.0

0.03

2.00

1.00

0.04

0.03

20.0

11.0

0.50

0.75

3.1.1 Check Analysis

Composition variations shall meet the applicable requirements of AMS2248.

3.2 Condition

Solution heat treated (see 8.2.1), cold drawn, pickled as required, and passivated in accordance with AMS2700. Passivation

shall be performed after final finishing.

3.3 Fabrication

3.3.1 Class 1

Tubing shall be produced by a seamless process.

3.3.2 Class 2

Tubing shall be produced by the gas-metal-arc, gas-tungsten-arc, or plasma arc process and subsequently drawn. Tubing

shall contain no more than one longitudinal weld and no circumferential welds. Tubing shall be processed to remove any

dimensional indication of the presence of welds. A minimum reduction of 30% is recommended.

3.3.3 Tensile properties shall be obtained by cold working and not by heat treatment.

3.3.4 The external and internal surface finishes shall not be rougher than 32 microinches (0.8 µm) and 63 microinches

(1.6 µm), respectively, determined in accordance with ASME B46.1, and may be produced by any method yielding

the specified surface condition that will not affect limits of wall thickness or corrosion resistance, with the exception

that centerless grinding is not acceptable. A light polish to improve surface appearance or meet surface finish

requirements may be employed.

3.4 Properties

Tubing shall conform to the following requirements; tensile and bend testing shall be performed in accordance with

ASTM A370:

3.4.1 Tensile properties shall be as shown in Table 2 and 3.4.1.1.

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摘要：

SAE AMS 5569C-2021 是一项由国际自动机工程师学会（SAE）发布的航空航天材料规范，专门针对耐腐蚀及耐热的不锈钢无缝管材（通常为304L型或类似不锈钢）。该标准于2021年更新，涵盖了焊接与非焊接条件下的技术要求，包括材料的化学成分、机械性能、热处理工艺、无损检测及尺寸公差等关键指标，适用于飞机液压系统、燃油管路、仪表管线等对耐腐蚀性和高温性能要求严苛的航空航天应用场景。AMS 5569C版本在原有基础上进一步强化了对晶间腐蚀控制与质量控制流程的要求，确保管材在极端环境下的可靠性

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