SAE AMS 6385M-2025 低合金耐热钢板、带材和板材 0.65Si 1.25Cr 0.50Mo 0.25V (0.27 0.33C) [17-22A(S)] 航空质量

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For more information on this standard, visit

https://www.sae.org/standards/content/AMS6385M/

AEROSPACE

MATERIAL SPECIFICATION

AMS6385™

REV. M

Issued 1959-06

Reaffirmed 1994-04

Revised 2025-01

Superseding AMS6385L

Steel Sheet, Strip, and Plate, Low Alloy, Heat-Resistant

0.65Si - 1.25Cr - 0.50Mo - 0.25V (0.27 - 0.33C) [17-22A(S)]

Aircraft Quality

(Composition similar to UNS K23015)

RATIONALE

AMS6385M is the result of a Five-Year Review and update of the specification. The revision updates the Title to add the

common name and material quality, adds composition reporting requirements (see 3.1.1), clarifies descaling requirements

(see 3.2.2 and 3.2.2.1), standardizes bend test requirements (see 3.3.4), updates decarburization test methods (see 3.3.3),

adds pyrometry (see 3.3.5), adds strain rate requirements for tensile testing (see 3.3.5.1.1.1), updates wording to

acknowledge changes in AMS2301 (see 4.2.1 and 4.4.3), and updates the prohibition on exceptions requirements

(see Table 2, 4.4.2, and 8.5).

1. SCOPE

1.1 Form

This specification covers an aircraft-quality, low-alloy steel in the form of sheet, strip, and plate.

1.2 Application

This material has been used typically for parts requiring strength up to 1000 °F (538 °C), but usage is not limited to such

applications.

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.

AMS2252 Tolerances, Low-Alloy Steel Sheet, Strip, and Plate

AMS2259 Chemical Check Analysis Limits, Wrought Low-Alloy and Carbon Steels

SAE INTERNATIONAL AMS6385™M Page 2 of 8

AMS2301 Steel Cleanliness, Aircraft Quality, Magnetic Particle Inspection Procedure

AMS2370 Quality Assurance Sampling and Testing, Carbon and Low-Alloy Steel Wrought Products and Forging Stock

AMS2750 Pyrometry

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

Plate, and Aircraft Tubing

AS7766 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 A370 Mechanical Testing of Steel Products

ASTM A751 Standard Test Methods, Practices, and Terminology for Chemical Analysis of Steel Products

ASTM E21 Elevated Temperature Tension Tests of Metallic Materials

ASTM E112 Determining Average Grain Size

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

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

ASTM E290 Bend Test of Materials for Ductility

ASTM E381 Macroetch Testing, Steel, Bars, Billets, Blooms, and Forgings

ASTM E1077 Estimating the Depth of Decarburization of Steel Specimens

2.3 Definitions

Terms used in AMS are defined in AS7766.

3. TECHNICAL REQUIREMENTS

3.1 Composition

Composition shall conform to the following percentages by weight shown in Table 1, determined in accordance with

ASTM A751 or by other analytical methods acceptable to the purchaser.

Table 1 - Composition

Element

Min

Max

Carbon

0.27

0.33

Manganese

0.45

0.65

Silicon

0.55

0.75

Phosphorus

0.025

Sulfur

0.025

Chromium

1.00

1.50

Molybdenum

0.40

0.60

Vanadium

0.20

0.30

Nickel

0.25

Copper

0.35

SAE INTERNATIONAL AMS6385™M Page 3 of 8

3.1.1 The producer may test for any element not listed in Table 1 and include this analysis in the report of 4.4. Reporting

of any element not listed in the composition table is not a basis for rejection unless limits of acceptability are

specified by the purchaser.

3.1.2 Check Analysis

Composition variations shall meet the applicable requirements of AMS2259.

3.2 Condition

The product shall be supplied in the following condition; hardness shall be determined in accordance with ASTM A370:

3.2.1 Sheet and Strip

Sheet and strip shall be cold finished, bright or atmosphere annealed, subcritically annealed or normalized, and descaled if

necessary, having hardness not higher than 98 HRB, or equivalent (see 8.2).

3.2.2 Plate

Plate shall be hot rolled, annealed, subcritically annealed or normalized, and descaled if necessary, having hardness not

higher than 24 HRC, or equivalent (see 8.2).

3.2.2.1 If allowed by the purchaser, cold rolled, annealed, subcritically annealed or normalized, and descaled, if

necessary, having hardness not higher than 24 HRC, or equivalent (see 8.2).

3.3 Properties

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

accordance with ASTM A370 except as specified in 3.3.5.1.2:

3.3.1 Macrostructure

Visual examination of transverse full cross sections from finished slab or billet or suitable rerolled product, etched in hot

hydrochloric acid in accordance with ASTM E381, shall show no pipes or cracks. Porosity, segregation, inclusions, and

other imperfections shall be no worse than the macrographs of ASTM E381 shown in Table 2.

Table 2 - Macrostructure

Section Size

Square Inches

Section Size

Square Centimeters

Macrographs

Up to 36, incl

Up to 232, incl

S2 - R1 - C2

Over 36 to 133, incl

Over 232 to 858, incl

S2 - R2 - C3

Over 133

Over 858

(1)

(1) Limits for larger sizes shall be agreed upon by the purchaser and producer.

3.3.2 Average Grain Size

Average grain size shall be ASTM No. 5 or finer, determined in accordance with ASTM E112 (see 8.4).

3.3.3 Decarburization

Decarburization shall be evaluated by one of the methods of 3.3.3.1 or 3.3.3.2.

3.3.3.1 Metallographic (Microscopic) Method

A cross section taken perpendicular to the surface shall be prepared in accordance with ASTM E1077 and examined

metallographically at a magnification not to exceed 200X. The sample shall not show a layer of complete (ferrite) or partial

decarburization exceeding the limits of Table 3.

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标签： #板材 #带 #低合金

摘要：

SAE AMS 6385M-2025 标准规范了低合金耐热钢板、带材和板材的技术要求，该材料含有 0.65% 硅、1.25% 铬、0.50% 钼、0.25% 钒以及 0.27% 至 0.33% 的碳，牌号为 17-22A(S)，属于航空级高品质钢材。本规范适用于需要在高温环境下保持强度、抗蠕变和抗氧化性能的关键航空结构件，如发动机部件、涡轮盘和紧固件。该标准由 SAE International 于2025年更新发布，替代了之前的版本，确保材料在制造、热处理和检验过程中符合严格的航空质量要求。对

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SAE AMS 6385M-2025 低合金耐热钢板、带材和板材 0.65Si 1.25Cr 0.50Mo 0.25V (0.27 0.33C) [17-22A(S)] 航空质量

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