ASTM A959 - 19

VIP免费

Carl 2024-09-02 71 110.69KB 10 页 14星币

侵权投诉

Designation: A959 −19

Standard Guide for

Specifying Harmonized Standard Grade Compositions for

Wrought Stainless Steels

This standard is issued under the ﬁxed designation A959; 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 guide provides a guide to ASTM Subcommittees

A01.06, A01.10, A01.17, A01.22, and A01.28 for specifying

chemical composition limits of wrought stainless steels. It is

intended that these recommended grade composition limits be

suitable for adoption by other standardization bodies that

prepare standards for stainless steel products.

1.2 Included in this guide are the recommendations for

determining the number of signiﬁcant ﬁgures for specifying

chemical composition from Test Methods, Practices, and Ter-

minology A751.

1.3 All stainless steel UNS numbers and the stainless steel

grades in all standards overseen by the aforementioned ASTM

subcommittees have been included, except those grades appli-

cable to restricted special end uses and alloys containing less

than 10.5 % minimum chromium.

1.4 Not addressed are minor composition modiﬁcations

which a speciﬁc product subcommittee may ﬁnd necessary to

accommodate effects of normal processing or to enhance

fabricability by the producer or user, or both.

1.5 Also not generally addressed (except when established

by ASTM product subcommittees) is a complete rationalization

of all limits, especially when such would conﬂict with long-

standing practices and is not justiﬁed by special technical

effect.

1.6 Excluded from this guide are cast material and welding

ﬁller metal.

1.7 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:

A751 Test Methods, Practices, and Terminology for Chemi-

cal Analysis of Steel Products

E527 Practice for Numbering Metals and Alloys in the

Uniﬁed Numbering System (UNS)

2.2 SAE Standards:

J 1086 Recommended Practice for Numbering Metals and

Alloys

HS-1086 Metals and Alloys in the Uniﬁed Numbering Sys-

tem

3. Terminology

3.1 Deﬁnitions of Terms Speciﬁc to This Standard:

3.1.1 austenitic grade, n—metallurgical term meaning that

the material is usually predominantly face-centered cubic in

structure and hardenable only by cold working.

3.1.2 austenitic-ferritic (duplex) grade, n—metallurgical

term meaning that the material is a mixture of austenitic and

ferritic structures, with at least one-fourth of the lesser phase,

and hardenable only by cold working.

3.1.3 ferritic grade, n—metallurgical term meaning that the

material is body-centered cubic in structure (with little, if any,

tempered martensite) and hardenable only slightly by cold

working (responding little or only slightly to conventional heat

treatment by quenching and tempering).

3.1.4 martensitic grade, n—metallurgical term meaning that

the material is capable of being produced in a distorted

body-centered cubic structure by conventional heat treating

and quenching, and that the quenched structure is capable of

conventional tempering. Martensitic grades are delivered in the

annealed (ferritic) condition or the hardened and tempered

(martensitic) condition.

3.1.5 precipitation hardening grade, n—metallurgical term

meaning that the material may be basically austenitic or

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

Stainless Steel and Related Alloysand is the direct responsibility of Subcommittee

A01.17 on Flat-Rolled and Wrought Stainless Steel.

Current edition approved Nov. 15, 2019. Published November 2019. Originally

approved in 1996. Last previous edition approved in 2016 as A959 – 16. DOI:

10.1520/A0959-19.

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.

Available from Society of Automotive Engineers (SAE), 400 Commonwealth

Dr., Warrendale, PA 15096-0001, http://www.sae.org.

*A Summary of Changes section appears at the end of this standard

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.

martensitic in structure and hardenable by precipitation hard-

ening (sometimes called age hardening).

3.1.6 standard stainless steel grade, n—listed chemical

composition associated with a stainless steel grade identiﬁed

by a particular UNS number appearing in SAE publication

HS-1086, except as modiﬁed by an ASTM subcommittee

having oversight of a wrought stainless steel product where

such a modiﬁcation is justiﬁed by a speciﬁc technical effect.

4. Signiﬁcance and Use

4.1 It is anticipated that the ASTM Subcommittees A01.06,

A01.10, A01.17, A01.22, and A01.28 will use the standard

composition limits listed in this guide for the grades identiﬁed

by the corresponding UNS designation in the product speciﬁ-

cation unless there is a speciﬁc technical justiﬁcation for doing

otherwise. The compositions in this guide shall not be consid-

ered as chemical requirements for any particular product until

adopted by the subcommittee overseeing that product.

4.2 Assuming that uniform compositions among the many

product standards for stainless steel are desirable, the compo-

sition limits provided in this standard are to be used as guides

in determining limits for each of the elements included in the

total composition of each grade. The composition limits have

been established with the intent that each product subcommit-

tee will ﬁnd it necessary to require only a minimum number of

changes to reﬂect speciﬁc technical effects. Section 5lists the

general guidelines followed for determining the limits for each

element; the limits established in this guide are based on these

guidelines.

4.3 Not included in this standard stainless steel grade

harmonization effort is an attempt to unify stainless steel

compositions in ASTM product standards by any means other

than recognizing current industry practices.

5. General Guidelines Used for Determining Composition

Limits

5.1 Carbon—It is recommended that limits be to only two

decimal places for levels of 0.04 % and higher because it is not

necessary to control to such precision at levels above 0.04 %.

(It should be recognized that limits such as 0.045 % maximum

may also be simply stated as 0.04 % maximum.) It is also

recommended that three decimal places be used at levels of

0.030 % and lower, unless, for example, it is clearly recognized

that 0.03 % maximum means that 0.035 % is satisfactory.

5.2 Manganese—Except for the Cr-Ni-Mn grades

(S2XXXX), it is recommended that limits of 2 % maximum

and 1 % maximum be used for the austenitic and other grades

respectively, except for the free machining grades with high

sulfur or selenium, or when necessary to promote nitrogen

solubility.

5.3 Phosphorus—It is recommended that 0.045 % maxi-

mum be applied to austenitic grades, and 0.040 % maximum to

other grades unless the sponsoring producer recommends a

lower limit for speciﬁc technical effect. Exception—some of

the Cr-Ni-Mn austenitic grades have always been produced to

0.060 % maximum.

5.4 Sulfur—It is recommended that 0.030 % maximum be

applied to all grades except the free-machining grades unless

lower limits have been required for speciﬁc technical effects.

5.5 Silicon—Past practice has been to establish 0.75 %

maximum for tubular related products such as ﬂat rolled and

tubulars, and 1.00 % maximum for long products and forgings.

For grades produced both as long and ﬂat-rolled products, 1 %

maximum was chosen since it will also include products

melted to lower limits. Use of lower or higher limits should be

based on speciﬁc technical effect.

5.6 Chromium—A composition spread of 2 % is recom-

mended; existing broader limits were not reduced to less than

a 3 % spread.

5.7 Nickel—It is recommended that the composition spread

not exceed 3 % unless a broader (generally higher) spread is

justiﬁed by speciﬁc technical effect.

5.8 Molybdenum—It is recommended that the composition

spread not exceed 1 %, unless a broader range is justiﬁed by

speciﬁc technical effect. Molybdenum limits having only a

maximum limit but no minimum should not be used unless

justiﬁed by speciﬁc technical effect.

5.9 Nitrogen—It is recommended that nitrogen limits having

only a maximum limit but no minimum should not be used

unless justiﬁed by speciﬁc technical effect.

5.10 Copper—It is recommended that copper limits having

only a maximum limit but no minimum should not be used

unless justiﬁed by speciﬁc technical effect.

5.11 Columbium and Tantalum—Except for special applica-

tions requiring positive identiﬁcation of tantalum, it is recom-

mended that prior listings of these two elements together be

limited to listing only columbium. The words “columbium”

and “niobium” refer to the same element.

6. Harmonized Standard Grade Stainless Steel

Compositions

6.1 The harmonized composition limits are shown in Table

1, grouped by metallurgical classiﬁcation, that is, austenitic,

austenitic-ferritic, and so forth. Within those groups, grades are

listed by UNS designation, in numerical order.

6.2 Unless adopted by the appropriate product subcommit-

tee in a product standard, the compositions described in this

guide shall not be used for specifying an ASTM product.

7. Keywords

7.1 austenitic stainless steels; austenitic-ferritic or ferritic-

austenitic stainless steels; duplex stainless steels; ferritic stain-

less steels; harmonized stainless steel compositions; marten-

sitic stainless steels; precipitation hardening stainless steels;

standard stainless steel grade compositions

A959 − 19

TABLE 1 Chemical Composition Limits, %

UNS

Designation

Type

Carbon Manganese Phosphorus Sulfur Silicon Chromium Nickle Molybdenum Nitrogen Copper Other Elements

Austenitic Grades

S16800 16-8-2H

0.05–0.10 2.00 0.045 0.030 1.00 14.5–16.5 7.5–9.5 1.50–2.00 . . . . . . . . .

S20100 201 0.15 5.5–7.5 0.060 0.030 1.00 16.0–18.0 3.5–5.5 . . . 0.25 . . . . . .

S20103 201L 0.03 5.5–7.5 0.045 0.030 1.00 16.0–18.0 3.5–5.5 . . . 0.25 . . . . . .

S20153 201LN

0.03 6.4–7.5 0.045 0.015 1.00 16.0–17.5 4.0–5.0 . . . 0.10–0.25 1.00 . . .

S20161 . . . 0.15 4.0–6.0 0.045 0.030 3.0–4.0 15.0–18.0 4.0–6.0 . . . 0.08–0.20 . . . . . .

S20162 . . . 0.15 4.0–8.0 0.040 0.040 2.5–4.5 16.5–21.0 6.0–10.0 0.50–2.50 0.05–0.25 . . . . . .

S20200 202 0.15 7.5–10.0 0.060 0.030 1.00 17.0–19.0 4.0–6.0 . . . 0.25 . . . . . .

S20300 XM-1

0.08 5.0–6.5 0.045 0.18–0.35 1.00 16.0–18.0 5.0–6.5 . . . . . . 1.75–2.2 . . .

S20400 . . . 0.030 7.0–9.0 0.045 0.030 1.00 15.0–17.0 1.50–3.00 . . . 0.15–0.30 . . . . . .

S20430 . . . 0.15 6.5–9.0 0.060 0.030 1.00 15.5–17.5 1.50–3.50 . . . 0.05–0.25 2.0–4.0 . . .

S20431 . . . 0.12 5.0–7.0 0.045 0.030 1.00 17.0–18.0 2.0–4.0 . . . 0.10–0.25 1.50–3.50 . . .

S20432 . . . 0.08 3.0–5.0 0.045 0.030 1.00 17.0–18.0 4.0–6.0 . . . 0.05–0.20 2.00–3.00 . . .

S20433 . . . 0.08 5.5–7.5 0.045 0.030 1.00 17.0–18.0 3.5–5.5 . . . 0.10–0.25 1.50–3.50 . . .

S20500 205 0.12–0.25 14.0–15.0 0.060 0.030 1.00 16.5–18.0 1.00–1.75 . . . 0.32–0.40 . . . . . .

S20910 XM-19

0.06 4.0–6.0 0.045 0.030 1.00 20.5–23.5 11.5–13.5 1.50–3.00 0.20–0.40 . . . Nb

0.10–0.30,

V 0.10–0.30

S21400 XM-31

0.12 14.0–16.0 0.045 0.030 0.30–1.00 17.0–18.5 1.00 . . . 0.35 min . . . . . .

S21460 XM-14

0.12 14.0–16.0 0.060 0.030 1.00 17.0–19.0 5.0–6.0 . . . 0.35–0.50 . . . . . .

S21500 . . . 0.06–0.15 5.5–7.0 0.045 0.030 0.2–1.0 14.0–16.0 9.0–11.0 0.80–1.20 . . . . . . Nb 0.75–1.25,

V 0.15–0.40,

B 0.003–0.009

S21600 XM-17

0.08 7.5–9.0 0.045 0.030 1.00 17.5–20.5 5.0–7.0 2.00–3.00 0.25–0.50 . . . . . .

S21603 XM-18

0.03 7.5–9.0 0.045 0.030 1.00 17.5–20.5 5.0–7.0 2.00–3.00 0.25–0.50 . . . . . .

S21640 . . . 0.08 3.5–6.5 0.060 0.030 1.00 17.5–19.5 4.0–6.5 0.50–2.00 0.08–0.30 . . . Nb 0.10–1.00

S21800 . . . 0.10 7.0–9.0 0.060 0.030 3.5–4.5 16.0–18.0 8.0–9.0 . . . 0.08–0.18 . . . . . .

S21900 XM-10

0.08 8.0–10.0 0.045 0.030 1.00 19.0–21.5 5.5–7.5 . . . 0.15–0.40 . . . . . .

S21904 XM-11

0.04 8.0–10.0 0.045 0.030 1.00 19.0–21.5 5.5–7.5 . . . 0.15–0.40 . . . . . .

S24000 XM-29

0.08 11.5–14.5 0.060 0.030 1.00 17.0–19.0 2.3–3.7 . . . 0.20–0.40 . . . . . .

S24100 XM-28

0.15 11.0–14.0 0.045 0.030 1.00 16.5–19.0 0.50–2.50 . . . 0.20–0.45 . . . . . .

S28200 . . . 0.15 17.0–19.0 0.045 0.030 1.00 17.0–19.0 . . . 0.75–1.25 0.40–0.60 0.75–1.25 . . .

S30100 301 0.15 2.00 0.045 0.030 1.00 16.0–18.0 6.0–8.0 . . . 0.10 . . . . . .

S30103 301L

0.030 2.00 0.045 0.030 1.00 16.0–18.0 5.0–8.0 . . . 0.20 . . . . . .

S30116 301Si 0.15 2.00 0.045 0.030 1.00–1.35 16.0–18.0 6.0–8.0 1.00 0.20 . . . . . .

S30153 301LN

0.030 2.00 0.045 0.030 1.00 16.0–18.0 5.0–8.0 . . . 0.07–0.20 . . . . . .

S30200 302 0.15 2.00 0.045 0.030 1.00 17.0–19.0 8.0–10.0 . . . 0.10 . . . . . .

S30215 302B 0.15 2.00 0.045 0.030 2.00–3.00 17.0–19.0 8.0–10.0 . . . 0.10 . . . . . .

S30300 303 0.15 2.00 0.20 0.15 min 1.00 17.0–19.0 8.0–10.0 . . . . . . . . . . . .

S30310 XM-15

0.15 2.5–4.5 0.20 0.25 min 1.00 17.0–19.0 7.0–9.0 . . . . . . . . . . . .

S30323 303Se 0.15 2.00 0.20 0.06 1.00 17.0–19.0 8.0–10.0 . . . . . . . . . Se 0.15 min

S30345 XM-2

0.15 2.00 0.05 0.11–0.16 1.00 17.0–19.0 8.0–10.0 0.40–0.60 . . . . . . Al 0.60–1.00

S30400 304 0.07 2.00 0.045 0.030 1.00 17.5–19.5 8.0–11.0 . . . . . . . . . . . .

S30403 304L 0.030 2.00 0.045 0.030 1.00 17.5–19.5 8.0–12.0 . . . . . . . . . . . .

S30409 304H 0.04–0.10 2.00 0.045 0.030 1.00 18.0–20.0 8.0–11.0 . . . . . . . . . . . .

S30415 . . . 0.04–0.06 0.80 0.045 0.030 1.00–2.00 18.0–19.0 9.0–10.0 . . . 0.12–0.18 . . . Ce 0.03–0.08

S30430 . . . 0.03 2.00 0.045 0.030 1.00 17.0–19.0 8.0–10.0 . . . . . . 3.0–4.0 . . .

S30432 . . . 0.07–0.13 0.50 0.045 0.030 0.30 17.0–19.0 7.5–10.5 . . . 0.05–0.12 2.5–3.5 Nb 0.20–0.60,

Al 0.003–0.030,

B 0.001–0.010

S30434 . . . 0.07–0.14 2.00 0.040 0.010 1.00 17.5–19.5 9.0–12.0 . . . . . . 2.50–3.50 Nb 0.10–0.40

Ti 0.10–0.25

B 0.001–0.004

S30435 . . . 0.08 2.00 0.045 0.030 1.00 16.0–18.0 7.0–9.0 . . . . . . 1.50–3.00 . . .

S30441 . . . 0.08 2.00 0.045 0.030 1.0–2.0 17.5–19.5 8.0–10.5 . . . 0.10 1.5–2.5 Nb 0.1–0.5,

W 0.2–0.8

S30451 304N 0.08 2.00 0.045 0.030 1.00 18.0–20.0 8.0–11.0 . . . 0.10–0.16 . . . . . .

S30452 XM-21

0.08 2.00 0.045 0.030 1.00 18.0–20.0 8.0–10.0 . . . 0.16–0.30 . . . . . .

A959 − 19

文档加载中……请稍候！
如果长时间未打开，您也可以点击刷新试试。

下载文档到电脑，查找使用更方便

亲，本站95%以上的标准规范都面向会员免费，办理VIP会员下载更省钱，平均每篇不到2元

立即下载 VIP免费下载

摘要：

ASTM A959-19 是 ASTM 国际标准组织发布的不锈钢牌号成分与规格协调指南，全称为“Standard Guide for Specifying Harmonized Standard Grade Compositions for Wrought Stainless Steels”（锻制不锈钢统一标准牌号成分指南）。该标准为不锈钢制造商、工程师和采购方提供了一套统一的化学成分和牌号命名规则，确保不同生产商之间的不锈钢产品在性能与成分上保持一致。ASTM A959-19 覆盖奥氏体、铁素

展开>> 收起<<

ASTM A959 - 19.pdf

共10页,预览4页

还剩页未读，继续阅读

声明：本文档系会员上传，若文档所含内容侵犯了您的版权或隐私，请立即通知，我们立即给予侵权申诉删除！

ASTM A959 - 19

相关推荐

开通VIP享超值会员特权

相关内容

热门标签

举报选择: