SAE AMS 2249K-2024

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For more information on this standard, visit

https://www.sae.org/standards/content/AMS2249K/

AEROSPACE

MATERIAL SPECIFICATION

AMS2249™

REV. K

Issued 1961-01

Reaffirmed 2013-10

Revised 2024-12

Superseding AMS2249J

Chemical Check Analysis Limits,

Titanium and Titanium Alloys

RATIONALE

AMS2249K results from a Five-Year Review and update of this specification with changes to align heat lot and material lot

definitions with AS7766 (see 2.3 and 4.1), expand coverage in Table 1 for Cb and add coverage for Mg (see Table 1),

update Applicable Documents (see Section 2), and relocate Definitions (see 2.3).

1. SCOPE

1.1 Form

This specification defines limits of variation for determining acceptability of the composition of cast or wrought titanium and

titanium alloy parts and material acquired from a producer.

1.2 Application

1.2.1 When specifically referenced in the material specification, the purchaser may apply check analysis limits to

determine the acceptability of parts and materials at the purchaser’s final acceptance or verification

testing operation.

1.2.2 Check analysis limits are not for the producer’s use at the producer’s acceptance testing. Composition of parts and

materials must conform to the limits of the material specification. Check limits are not permitted for ladle or

ingot analysis.

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.

AS7766 Terms Used in Aerospace Metals Specifications

SAE INTERNATIONAL AMS2249™K Page 2 of 4

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 E539 Analysis of Titanium Alloys by Wavelength Dispersive X-Ray Fluorescence Spectrometry

ASTM E1409 Determination of Oxygen and Nitrogen in Titanium and Titanium Alloys by Inert Gas Fusion

ASTM E1447 Determination of Hydrogen in Reactive Metals and Reactive Metal Alloys by Inert Gas Fusion with Detection

by Thermal Conductivity or Infrared Spectrometry

ASTM E1941 Determination of Carbon in Refractory and Reactive Metals and Their Alloys by Combustion Analysis

ASTM E2371 Analysis of Titanium and Titanium Alloys by Direct Current Plasma and Inductively Coupled Plasma Atomic

Emission Spectrometry (Performance-Based Test Methodology)

ASTM E2994 Analysis of Titanium and Titanium Alloys by Spark Atomic Emission Spectrometry and Glow Discharge

Atomic Emission Spectrometry (Performance-Based Method)

2.3 Definitions

Terms used in AMS are defined in AS7766 and as follows:

2.3.1 CHECK ANALYSIS

An analysis made by the purchaser or producer of the metal after it has been worked into semifinished or finished forms or

fabricated into parts and is either for the purpose of verifying the composition of a heat lot or material lot or to determine

variations in the composition within the heat lot. Acceptance or rejection of a heat lot or material lot of material or batch of

parts may be made by the purchaser on the basis of this check analysis. In the analysis of finished parts, these values do

not apply to elements whose percentage can be varied by fabricating techniques employed (for example, oxygen, nitrogen,

hydrogen) unless the sample is sufficiently large to produce a reliable result.

2.3.2 VARIATION LIMIT, UNDER MINIMUM OR OVER MAXIMUM

Given in Table 1 is the amount an individual determination for a specified element may vary under or over the specified

composition limit. In no case shall the several determinations of any element in a heat lot, using the same analytical

procedure, vary both above and below the specified range. These variations are not permitted for ingot analyses made by

the producer.

2.3.3 REMAINDER

Shows the basis element from which the alloy is made and is assumed to be present in an amount approximately equal to

the difference between 100% and the sum percentage of the alloying elements and listed impurities. Analysis for this

element need not be made nor need a percentage figure be reported.

2.3.4 OTHER ELEMENTS, EACH, MAXIMUM

The maximum amount of an individual element not mentioned specifically in the tabulated composition that may be present.

The producer normally will analyze only for impurities which are possible to be present because of raw materials or

manufacturing processes and which may affect the product significantly. Others will analyze for impurities as they

deem necessary.

2.3.5 OTHER ELEMENTS, TOTAL, MAXIMUM

The sum percentage of the other (residual) elements (see 2.3.4) found. It is not inferred by this statement that an analysis

need be made for each element of the periodic table not mentioned specifically in the tabulated composition.

SAE INTERNATIONAL AMS2249™K Page 3 of 4

3. TECHNICAL REQUIREMENTS

3.1 Analytical Procedures

Referee methods of analysis shall be ASTM E1409 for oxygen and nitrogen, ASTM E1447 for hydrogen, and ASTM E1941

for carbon. Other elements shall be determined by ASTM E2371, ASTM E539, or ASTM E2994.

3.2 Check (Product) Analysis Limits

Shall be as shown in Table 1. Check analysis limits for elements or for ranges of elements not listed herein shall be as

specified in the applicable material specification or as agreed upon by the purchaser and producer.

Table 1 - Check analysis limits

Element

Limits or Maximum of

Specified Range

Variation

Under Min or Over Max

Carbon

Up to 0.20, incl

0.02

Over 0.20 to 0.50, incl

0.04

Over 0.50

0.06

Manganese

Up to 0.30, incl

0.10

Over 0.30 to 6.00, incl

0.20

Over 6.00 to 9.00, incl

0.25

Chromium

Up to 1.00, incl

0.05

Over 1.00 to 4.00, incl

0.20

Over 4.00

0.25

Molybdenum

Up to 0.50, incl

0.04

Over 0.50 to 1.00, incl

0.10

Over 1.00 to 10.00, incl

0.20

Over 10.00 to 30.00, incl

0.25

Aluminum

Up to 1.00, incl

0.12

Over 1.00 to 10.00, incl

0.40

Over 10.00 to 30.00, incl

0.50

Hydrogen

Up to 0.020 ( 200 ppm), incl

0.0020 ( 20 ppm)

Over 0.020 to 0.050 ( 200 to 500 ppm), incl

0.005 ( 50 ppm)

Over 0.050 ( 500 ppm)

0.010 (100 ppm)

Nitrogen

Up to 0.10 (1000 ppm), incl

0.02 (200 ppm)

Oxygen

Up to 0.20 (2000 ppm), incl

0.02 (200 ppm)

Over 0.20 (2000 ppm)

0.03 (300 ppm)

Iron

Up to 0.25, incl

0.10

Over 0.25 to 0.50, incl

0.15

Over 0.50 to 5.00, incl

0.20

Over 5.00

0.25

Vanadium

Up to 0.50, incl

0.05

Over 0.50 to 5.00, incl

0.15

Over 5.00 to 6.00, incl

0.20

Over 6.00 to 10.00, incl

0.30

Over 10.00 to 20.00, incl

0.40

Tin

Up to 3.00, incl

0.15

Over 3.00 to 6.00, incl

0.25

Over 6.00 to 12.00, incl

0.40

Copper

Up to 1.00, incl

0.05

Over 1.00 to 3.00, incl

0.10

Zirconium

Up to 4.00, incl

0.10

Over 4.00 to 6.00, incl

0.20

Over 6.00 to 10.00, incl

0.30

Over 10.00

0.40

Columbium

Up to 1.00, incl

0.10

Over 1.00 to 5.00, incl

0.15

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摘要：

本文档详细介绍了SAE AMS 2249K-2024标准的最新修订内容，该标准全称为“化学检验分析取样要求”，由国际自动机工程师学会（SAE）发布，适用于航空航天材料与工艺的质量控制。该标准明确规定了在冶炼、铸造及加工过程中对金属及合金进行化学分析时的取样程序、试样数量及位置要求，旨在确保分析结果的代表性和准确性，从而保障航空航天零部件的可靠性与安全性。AMS 2249K取代了之前的AMS 2249J版本，主要更新包括对取样频率的细化调整、新增对增材制造用粉末材料的分析指南，以及与ISO和AST

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