ASTM A836 - A 836M - 14 (2020)

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Designation: A836/A836M −14 (Reapproved 2020)

Standard Speciﬁcation for

Titanium-Stabilized Carbon Steel Forgings for Glass-Lined

Piping and Pressure Vessel Service

This standard is issued under the ﬁxed designation A836/A836M; the number immediately following the designation indicates the year

of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval.

A superscript epsilon (´) indicates an editorial change since the last revision or reapproval.

1. Scope

1.1 This speciﬁcation covers nonstandard as-forged ﬁttings,

valve components, and parts for glass-lined piping and pres-

sure vessel service. Mechanical properties are certiﬁed on the

basis of test material subjected to heat treatments to simulate

glass-coating operations.

1.2 The values stated in either inch-pound units or SI units

are to be regarded separately as standard. Within the text, the

SI units are shown in brackets. The values stated in each

system are not exact equivalents; therefore, each system must

be used independently of the other. Combining values from the

two systems may result in nonconformance with the speciﬁ-

cation. The inch-pound units shall apply unless the “M”

designation of this speciﬁcation is speciﬁed in the order.

1.3 This international standard was developed in accor-

dance with internationally recognized principles on standard-

ization established in the Decision on Principles for the

Development of International Standards, Guides and Recom-

mendations issued by the World Trade Organization Technical

Barriers to Trade (TBT) Committee.

2. Referenced Documents

2.1 ASTM Standards:

A788/A788M Speciﬁcation for Steel Forgings, General Re-

quirements

A961/A961M Speciﬁcation for Common Requirements for

Steel Flanges, Forged Fittings, Valves, and Parts for

Piping Applications

3. Ordering Information

3.1 Product furnished to this speciﬁcation shall conform to

the requirements of Speciﬁcation A961/A961M, including any

supplementary requirements that are indicated in the purchase

order. Failure to comply with the requirements of Speciﬁcation

A961/A961M constitutes non-conformance with this speciﬁ-

cation.

3.2 It is the purchaser’s responsibility to specify in the

purchase order all ordering information necessary to purchase

the needed material. Examples of such information include but

are not limited to the ordering information in Speciﬁcation

A961/A961M and the following:

3.2.1 Supplementary requirements, and

3.2.2 Additional requirements (see 11.1,13.1, and 13.2).

3.3 If the requirements of this speciﬁcation are in conﬂict

with the requirements of Speciﬁcation A961/A961M, the

requirements of this speciﬁcation shall prevail.

4. Materials and Manufacture

4.1 The material shall be forged by hammering, pressing,

rolling, extruding, or upsetting, such that the ﬁnished product

will be a forging as deﬁned in the Terminology Section of

Speciﬁcation A788/A788M.

4.2 When speciﬁed in the order, the manufacturer shall

submit for approval by the purchaser a sketch showing the

shape of the rough forging before machining.

4.3 Forgings shall be protected against sudden or too rapid

cooling from the rolling or forging while passing through the

critical range.

4.4 Heat treatment of forgings is neither required nor

prohibited. However, the test material for qualifying the

forging or the welding procedure shall be heat treated to

simulate glass-coating operations.

5. Chemical Composition

5.1 An analysis of each heat shall be made by the manufac-

turer to determine the percentages of the elements speciﬁed in

Table 1. The chemical composition thus determined shall

conform to the requirements in Table 1.

6. Mechanical Properties

6.1 The test material shall conform to the requirements as to

tensile properties prescribed in Table 2.

This speciﬁcation is under the jurisdiction of ASTM Committee A01 on Steel,

Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee

A01.22 on Steel Forgings and Wrought Fittings for Piping Applications and Bolting

Materials for Piping and Special Purpose Applications.

Current edition approved Nov. 1, 2020. Published November 2020. Originally

approved in 1984. Last previous edition approved in 2014 as A836/A836M – 14.

DOI: 10.1520/A0836_A0836M-14R20.

For referenced ASTM standards, visit the ASTM website, www.astm.org, or

contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM

Standards volume information, refer to the standard’s Document Summary page on

the ASTM website.

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the

Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

7. Number of Tests and Retests

7.1 One tension test shall be made from each heat.

7.2 If any test specimen is defectively machined, it may be

discarded and another specimen substituted.

8. Retests

8.1 When one or more representative test specimens do not

conform to speciﬁcation requirements for the tested

characteristic, only a single retest for each nonconforming

characteristic may be performed to establish product accept-

ability. Retests shall be performed on twice the number of

representative specimens that were originally nonconforming.

When any retest specimen does not conform to speciﬁcation

requirements for the characteristic in question, the lot repre-

sented by that specimen shall be rejected, or the test material

shall be heat treated or reheat-treated in accordance with 4.4,

and tested in accordance with Sections 6 and 7.

9. Test Specimens

9.1 The test material to be used for qualifying the forgings

shall be heat treated with the forgings represented by the test

material, if the forgings are heat treated, then, the test material

shall be normalized three times from a minimum temperature

of 1550 °F [845 °C] prior to testing. This heat treatment

simulates glass-coating operations.

10. Surface Finish, Appearance, and Corrosion

Protection

10.1 The requirements of Speciﬁcation A961/A961M apply

to forgings and ﬁnished parts.

11. Repair by Welding

11.1 Approval by the purchaser shall be required prior to

weld repair.

11.2 The welded test plate used to qualify the procedure

shall be normalized three times at 1550 °F [845 °C] prior to

testing to simulate glass-coating operations.

11.3 The composition of the weld deposits shall be similar

to the base metal and in accordance with the procedure

qualiﬁcation for the applicable material. Welding shall be

accomplished with a weld procedure designed to produce low

hydrogen in the weldment. Short-circuit gas metal arc welding

is permissible only with the approval of the purchaser.

12. Rejection and Rehearing

12.1 Samples representing material rejected by the pur-

chaser shall be preserved until disposition of the claim has been

agreed upon by the manufacturer and the purchaser.

13. Certiﬁcation

13.1 See Speciﬁcation A961/A961M.

13.2 A test report of the test results for chemistry (Section 5

and Table 1) and tensile properties (Section 6and Table 2) shall

be furnished.

14. Product Marking

14.1 In addition to marking requirements of Speciﬁcation

A961/A961M, the following additional marking requirements

shall apply:

14.1.1 Forgings repaired by welding shall be marked with

the letter “W” following this speciﬁcation number.

14.2 Bar Coding—In addition to the requirements in 14.1,

bar coding is acceptable as a supplemental identiﬁcation

method. The purchaser may specify in the order a speciﬁc bar

coding system to be used. The bar coding system, if applied at

the discretion of the supplier, should be consistent with one of

the published industry standards for bar coding. If used on

small parts, the bar code may be applied to the box or a

substantially applied tag.

15. Keywords

15.1 carbon; pipe ﬁttings; piping applications; pressure

containing parts; pressure vessel service; steel; steel ﬂanges;

steel forgings; steel valves

TABLE 1 Chemical Requirements

Element Composition, %

Carbon, max 0.20

Manganese, max 0.90

Phosphorus, max 0.05

Silicon, max 0.35

Sulfur, max 0.05

Titanium, min 4× carbon content

Titanium, max. 1.00

TABLE 2 Tensile Requirements

Class I

Tensile strength, min, ksi [MPa] 55 [380]

Yield strength,

min, ksi [MPa] 25 [175]

Elongation in 2 in. or 50 mm, min, % 22

Reduction of area, min, % 35

Determined by either the 0.2 % offset method or the 0.5 % extension-under-load

method.

A836/A836M − 14 (2020)

ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned

in this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk

of infringement of such rights, are entirely their own responsibility.

This standard is subject to revision at any time by the responsible technical committee and must be reviewed every ﬁve years and

if not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standards

and should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of the

responsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you should

make your views known to the ASTM Committee on Standards, at the address shown below.

This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,

United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the above

address or at 610-832-9585 (phone), 610-832-9555 (fax), or service@astm.org (e-mail); or through the ASTM website

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A836/A836M − 14 (2020)

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摘要：

ASTM A836 - A 836M - 14 (2020) 是一项关于钛稳定化碳钢及合金钢锻制管配件的标准规范，涵盖适用于高温及高压服务的无缝和焊接配件。该标准于2020年重新批准，确保其时效性与行业适用性。标准规定了材料的化学成分、力学性能、热处理要求及制造工艺，重点突出钛元素的稳定化处理以提高抗晶间腐蚀能力。适用于石油、化工、电力等行业的管道系统，尤其是高温高压环境下的法兰、三通、弯头等关键配件。描述中需强调该标准在确保安全性、合规性与国际互认方面的核心价值，同时提示用户区分公制（A836

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