SAE AMS 5561H-2021

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suggestions.

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

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

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Email: CustomerService@sae.org

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For more information on this standard, visit

https://www.sae.org/standards/content/AMS5561H/

AEROSPACE

MATERIAL SPECIFICATION

AMS5561™

REV. H

Issued 1974-12

Reaffirmed 2012-10

Revised 2021-10

Superseding AMS5561G

Steel, Corrosion and Heat-Resistant, Welded and Drawn or Seamless and Drawn

Tubing

9.0Mn - 20Cr - 6.5Ni - 0.28N

High-Pressure Hydraulic

(Composition similar to UNS S21900)

RATIONALE

AMS5561 has been revised and updated to comply with the SAE Five-Year Review policy. The revised document prohibits

unauthorized exceptions (3.7, 4.4.1, 5.2.1, 8.5), updates composition testing (3.1), specifies passivation (3.3.1), updates

cleanliness testing (3.5.2), revises NDT specification (3.5.4), adds country of origin (4.4), and allows prior revisions (8.4).

1. SCOPE

1.1 Form

This specification covers a corrosion and heat-resistant steel in the form of welded and drawn or seamless and drawn

tubing.

1.2 Application

This tubing has been used typically for parts, such as fluid lines, subject to high pressures and requiring corrosion resistance,

but usage is not limited to such applications. Tubing has good oxidation resistance up to 1100 °F (593 °C).

1.3 Classification

1.3.1 Tubing, covered by this specification, is classified by form of fabrication as follows:

Type 1 - Welded and drawn

Type 2 - Seamless and drawn

1.3.1.1 If no type is specified, Type 1 shall be supplied.

1.3.2 Tubing, covered by this specification, is classified by quality evaluation as follows:

Class 1 - 0.125 inch (3.18 mm) length Ultrasonic Calibration

Class 2 - 0.060 inch (1.52 mm) length Ultrasonic Calibration

Class 3 - Ultrasonic testing not required

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SAE INTERNATIONAL AMS5561™H Page 2 of 9

1.3.2.1 If no class or Class 1 is specified, Class 1 or Class 2 may be supplied. If Class 3 is specified, any of the three

classes may be supplied.

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), or 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

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, or 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/ASTM A1016M General Requirements for Ferritic Alloy Steel, 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,

Titanium, Austenitic Stainless Steel and Similar Alloys

2.3 ASME Publications

Available from ASME International, 22 Law Drive, Box 2900, Fairfield, NJ 07007-2900 or www.asme.org.

ASME B46.1 Surface Texture

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SAE INTERNATIONAL AMS5561™H Page 3 of 9

3. TECHNICAL REQUIREMENTS

3.1 Composition

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

acceptable to purchaser.

Table 1 - Composition

Element

Min

Max

Carbon

0.040

Manganese

8.00

10.00

Silicon

1.00

Phosphorus

0.030

Sulfur

0.030

Chromium

19.00

21.50

Nickel

5.50

7.50

Nitrogen

0.15

0.40

Molybdenum

0.75

Copper

0.75

3.1.1 Check Analysis

Composition variations shall meet the applicable requirements of AMS2248.

3.2 Condition

Cold drawn and pickled as required or passivated.

3.3 Fabrication

Type 1 tubing shall be produced by drawing of welded hollows, and Type 2 tubing shall be produced by drawing of seamless

hollows. Tensile properties shall be obtained by cold working and not by heat treatment (annealing). The external and

internal surface finishes shall be not rougher than 32 µin(0.8 µm) and 63 µin (1.6 µm) respectively, determined in accordance

with ASME B46.1, and may be produced by any method yielding the specified surface condition and which will not affect

limits of wall thickness or corrosion resistance, with the exception that centerless ground finish is not acceptable. Type 1

tubing shall be processed to remove the bead and any dimensional indication of the presence of welds. A light polish to

improve surface appearance or meet surface finish requirements may be employed.

3.3.1 Tubing shall be passivated in accordance with AMS2700 after any ID or OD finishing that occurs after cold drawing.

3.4 Properties

Tubing shall conform to the following requirements:

3.4.1 Tensile Properties

Shall be as shown in Table 2, except as permitted by 3.4.1.1, determined in accordance with ASTM A370.

Table 2 - Tensile Properties

Property

Value

Tensile Strength

142 to 162 ksi (979 to 1117 MPa)

Yield Strength at 0.2% Offset, Minimum

120 ksi (827 MPa)

Elongation in 2 Inches (50 mm), Minimum

20%

3.4.1.1 Tubing under 0.50 inch (12.7 mm) in nominal OD and having wall thickness of 0.020 inch (0.51 mm) or under

may have elongation as low as 16%.

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摘要：

SAE AMS 5561H-2021 是一项由国际自动机工程师学会（SAE）发布的最新版航空航天材料规范（Aerospace Material Specification），针对耐腐蚀、耐热及抗氧化性能优异的无缝或焊接不锈钢管材。该标准主要涵盖适用于航空液压系统、燃油系统及高温环境管路制造的18-8型不锈钢（如304/304L系列），并规定了化学成分、力学性能、热处理工艺及无损检测要求。H版更新对材料均匀性、尺寸公差及工艺控制提出了更严格的技术指标，确保在高压力、高温度航空工况下的可靠性与寿命。

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