SAE AMS 5848E-2018

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AEROSPACE

MATERIAL SPECIFICATION

AMS5848™

REV. E

Issued 1987-01

Revised 2018-07

Superseding AMS5848D

Steel, Corrosion-Resistant, Bars, Wire, Forgings, Extrusions, Tubing, and Rings

Wear and Galling Resistant

8.0Mn - 4.0Si - 17Cr - 8.5Ni - 0.13N

Solution Heat Treated

(Composition similar to UNS S21800

RATIONALE

AMS5848E prohibits unauthorized exceptions (3.5), revises Composition analysis standards (3.1), Condition (3.2.1.1),

Properties (3.4.4, 3.4.5), Reports (4.4), and Identification (5.2.4), and results from a Five-Year Review and update of this

specification.

1. SCOPE

1.1 Form

This specification covers a corrosion-resistant steel in the form of bars, wire, forgings, extrusions, mechanical tubing, flash

welded rings, and stock for forging, extruding, or flash welded rings.

1.2 Application

These products have been used typically for parts requiring wear, galling, and corrosion resistance up to 950 °F (510 °C),

but usage is not limited to such applications. Welding, brazing, or other exposure to temperatures over 950 °F (510 °C)

during fabrication may impair corrosion resistance.

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

AMS2243 Tolerances, Corrosion and Heat-Resistant Steel Tubing

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SAE INTERNATIONAL AMS5848E™ Page 2 of 8

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

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

AMS7490 Rings, Flash Welded, Corrosion and Heat-Resistant Austenitic Steels, Austenitic-Type Iron, Nickel, or

Cobalt Alloys, or Precipitation-Hardenable Alloys

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 Test Methods, Practices, and Terminology for Chemical Analysis of Steel Products

ASTM E140 Hardness 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 percentages by weight shown in Table 1, determined by wet chemical methods in accordance with

ASTM A751, by spectrochemical methods, or by other analytical methods acceptable to purchaser.

Table 1 - Composition

Element

Min

Max

Carbon

0.10

Manganese

7.00

9.00

Silicon

3.50

4.50

Phosphorus

0.040

Sulfur

0.030

Chromium

16.00

18.00

Nickel

8.00

9.00

Nitrogen

0.08

0.18

Molybdenum

0.75

Copper

0.75

3.1.1 Check Analysis

Composition variations shall meet the applicable requirements of AMS2248.

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SAE INTERNATIONAL AMS5848E™ Page 3 of 8

3.2 Condition

The product shall be supplied in the following condition:

3.2.1 Bars, Wire, Forgings, Extrusions, Mechanical Tubing, and Flash Welded Rings

Solution heat treated, free from continuous carbide network.

3.2.1.1 Bars and Wire

3.2.1.1.1 All hexagons regardless of size, other bars 2.75 inches (69.8 mm) and under in nominal diameter or least

distance between parallel sides, and wire shall be cold finished.

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

sides shall be hot finished or cold finished.

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

3.2.1.2 Mechanical Tubing

Shall be cold finished.

3.2.1.3 Flash Welded Rings

Shall not be supplied unless specified or permitted on purchaser's part drawing. When supplied, rings shall be manufactured

in accordance with AMS7490.

3.2.2 Stock for Forging, Extruding, or Flash Welded Rings

As ordered by the forging, extrusion, or flash welded ring manufacturer.

3.3 Heat Treatment

Bars, wire, forgings, extrusions, mechanical tubing, and flash welded rings shall be solution heat treated by heating within

the range 1925 to 1975 °F (1052 to 1079 °C), holding at heat for a time commensurate with section thickness, and cooling

at a rate equivalent to an air cool or faster.

3.4 Properties

The product shall conform to the following requirements; tensile and hardness testing shall be performed in accordance

with ASTM A370.

3.4.1 Bars, Wire, Forgings, Extrusions, Mechanical Tubing, and Flash Welded Rings

3.4.1.1 Tensile Properties

Shall be as shown in Tables 2 and 3.

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摘要：

SAE AMS 5848E-2018 是 SAE International 发布的航空航天材料规范标准，主要针对一种高耐腐蚀、高强度的马氏体时效不锈钢。该标准详细规定了材料的化学成分、力学性能、热处理工艺、检验方法及验收要求，适用于航空航天领域中对耐蚀性和强度有严格要求的部件制造，如飞机起落架、结构件及液压系统组件。与旧版相比，AMS 5848E 进一步优化了材料韧性指标和工艺控制参数，确保了在极端工况下的可靠性和一致性。该规范为材料供应商和航空制造企业提供了统一的技术依据，有助于提升产品质量

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