ASTM F738M - 02 (2008)

VIP免费

Carl 2024-09-04 31 172.97KB 9 页 10星币

Designation: F 738M – 02 (Reapproved 2008)

Standard Speciﬁcation for

Stainless Steel Metric Bolts, Screws, and Studs

This standard is issued under the ﬁxed designation F 738M; 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.

This standard has been approved for use by agencies of the Department of Defense.

1. Scope

1.1 This speciﬁcation covers the chemical and mechanical

requirements for stainless steel metric bolts, screws, and studs

with nominal thread diameters M1.6 through M36 and is

intended for use in engineering applications requiring general

corrosion resistance.

1.2 Eight groups of stainless steel alloys are covered,

including three austenitic (Grades A1, A2, and A4), one ferritic

(Grade F1), three martensitic (Grades C1, C3, and C4), and one

precipitation hardening (Grade P1).

1.3 Twenty property classes are covered, including nine

austenitic, two ferritic, eight martensitic, and one precipitation

hardening. The property classes with the permissible alloys for

each are listed in Table 1.

1.4 This speciﬁcation is based in concept and content on

ISO 3506. The chemical and mechanical requirements speci-

ﬁed for all property classes, except as given in 1.4.1, are

essentially identical with classes of the same designation in

ISO 3506.

1.4.1 This speciﬁcation includes all of the property classes

covered in ISO 3506. Additionally, it includes property classes

A1-70, A2-70, A4-70, A1-80, A2-80, and A4-80 for products

with nominal thread diameters larger than M20; and four

non-ISO property classes, C1-110, C4-110, C3-120; and P1-90.

1.5 Supplementary requirements of an optional nature are

provided, applicable only when agreed upon between the

manufacturer and the purchaser at the time of the inquiry and

order.

1.6 Suitable nuts for use with bolts, screws, and studs

included in this speciﬁcation are covered by Speciﬁcation

F 836M.

1.7 Units—The values stated in SI units are to be regarded

as standard. No other units of measurement are included in this

standard.

1.8 The following safety hazards caveat pertains only to

the test method described in this speciﬁcation. This standard

does not purport to address the safety problems associated with

its use. It is the responsibility of the user of this standard to

establish appropriate safety and health practices and deter-

mine the applicability of regulatory limitations prior to use.

2. Referenced Documents

2.1 ASTM Standards:

A 276 Speciﬁcation for Stainless Steel Bars and Shapes

A 342/A 342M Test Methods for Permeability of Feebly

Magnetic Materials

A 380 Practice for Cleaning, Descaling, and Passivation of

Stainless Steel Parts, Equipment, and Systems

A 484/A 484M Speciﬁcation for General Requirements for

Stainless Steel Bars, Billets, and Forgings

A 493 Speciﬁcation for Stainless Steel Wire and Wire Rods

for Cold Heading and Cold Forging

A 555/A 555M Speciﬁcation for General Requirements for

Stainless Steel Wire and Wire Rods

A 564/A 564M Speciﬁcation for Hot-Rolled and Cold-

Finished Age-Hardening Stainless Steel Bars and Shapes

A 582/A 582M Speciﬁcation for Free-Machining Stainless

Steel Bars

A 751 Test Methods, Practices, and Terminology for

Chemical Analysis of Steel Products

D 3951 Practice for Commercial Packaging

E29 Practice for Using Signiﬁcant Digits in Test Data to

Determine Conformance with Speciﬁcations

E 353 Test Methods for Chemical Analysis of Stainless,

Heat-Resisting, Maraging, and Other Similar Chromium-

Nickel-Iron Alloys

F 606M Test Methods for Determining the Mechanical

Properties of Externally and Internally Threaded Fasteners,

Washers, and Rivets (Metric)

F 836M Speciﬁcation for Style 1 Stainless Steel Metric

Nuts (Metric)

F 1470 Guide for Fastener Sampling for Speciﬁed Mechani-

cal Properties and Performance Inspection

This speciﬁcation is under the jurisdiction of ASTM Committee F16 on

Fasteners and is the direct responsibility of Subcommittee F16.04 on Nonferrous

Fasteners.

Current edition approved May 1, 2008. Published August 2008. Originally

approved in 1981. Last previous edition approved in 2002 as F 738M – 02.

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.

Provided by IHS under license with ASTM

Licensee=ISATIS Group http://st2014.ir

Not for Resale, 06/20/2013 04:10:09 MDT

No reproduction or networking permitted without license from IHS

--`,`,`,,``,`,````,,,``,``,,,,,,-`-`,,`,,`,`,,`---

2.2 ISO Standard:

ISO 3506 Corrosion-Resistant Stainless Steel Fasteners

3. Classiﬁcation

3.1 The designation of each property class is composed of

three parts: a letter, followed by a single digit, followed by

either two or three digits.

3.1.1 The letter indicates the general composition type of

stainless steel as follows:

3.1.1.1 A for austenitic steels,

3.1.1.2 F for ferritic steels,

3.1.1.3 C for martensitic steels, and

3.1.1.4 P for precipitation-hardening steel.

3.1.2 The ﬁrst digit (1, 2, 3, or 4) indicates the alloy group.

The permissible alloys within each group are given in Table 1.

3.1.3 The last two or three digits (50, 70, 110, etc.) indicate

10 % of the speciﬁed minimum tensile strength of the property

class.

3.1.4 For example, Class A1-50 is an austenitic steel of any

one of six permitted alloys, and the manufactured fastener has

a minimum tensile strength of 500 MPa.

4. Ordering Information

4.1 Orders for bolts, screws and studs under this speciﬁca-

tion shall include the following:

4.1.1 Quantity (number of pieces of each item).

4.1.2 Name of item (bolt, screw, stud, etc.; speciﬁc type and

style; and reference to dimensional standard when appropri-

ate).

4.1.3 Size (nominal diameter, thread pitch, length).

4.1.4 Property class.

4.1.5 ASTM designation and date of issue. When date of

issue is not speciﬁed, fasteners shall be furnished to the latest

issue.

4.1.6 Supplementary requirements, if any (S1 through S5).

4.1.7 Additional requirements, if any, to be speciﬁed on the

purchase order:

4.1.7.1 Forming (5.2.1).

4.1.7.2 Threading (5.2.2).

4.1.7.3 Alloy condition (5.2.3).

4.1.7.4 Protective ﬁnish (5.2.5).

4.1.7.5 Alloy selection (7.2).

4.1.7.6 Test report (9.2).

4.1.7.7 Heat number (9.1.1).

4.1.7.8 Additional testing (9.3).

4.1.7.9 Inspection (11.1).

4.1.7.10 Rejection (12.1).

4.1.7.11 Certiﬁcation (13.1).

4.1.7.12 Marking (14.1.3 and 14.1.4).

NOTE 1—Examples:

10 000 hex-cap screws, ANSI B18.2.3.1M, M12 31.75 350, Class

A2–70, furnish test report, ASTM F 738, dated _____.

15 000 oval-head machine screws, Type 1 recess, ANSI B18.6.7M, M3

30.5 325, Class C4-70, 416Se, Supplementary Requirement S2, ASTM

F 738, dated _____.

5. Materials and Manufacture

5.1 Materials:

5.1.1 Speciﬁcations A 276,A 493,A 564/A 564M, and

A 582/A 582M are noted for information only as suitable

sources of material for the manufacture of bolts, hex cap

screws, and studs to this speciﬁcation.

5.2 Manufacture:

5.2.1 Forming—Unless otherwise speciﬁed, fasteners shall

be cold-formed, hot-formed, or machined, at the option of the

manufacturer.

5.2.2 Threads—Unless otherwise speciﬁed, threads shall be

rolled or cut at the option of the manufacturer.

Available from American National Standards Institute (ANSI), 25 W. 43rd St.,

4th Floor, New York, NY 10036, http://www.ansi.org.

TABLE 1 Property Classes of Stainless Steel Bolts, Screws, and

Studs

Property Class Permissible Alloys

A1-50 304, 304L, 305

A1-70 384, 18–9LW, 302HQ

A1-80

A2-50

A2-70 321, 347

A2-80

A4-50

A4-70 316, 316L

A4-80

F1-45

F1-60

430

C1-50

C1-70 410

C1-110

C3-80

C3-120

431

C4-50

C4-70 416, 416Se

C4-110

P1-90 630

When approved by the purchaser, Alloys 303, 303Se, or XM1 may be

furnished.

When approved by the purchaser, Alloy 430F may be furnished.

F 738M – 02 (2008)

Provided by IHS under license with ASTM

Licensee=ISATIS Group http://st2014.ir

Not for Resale, 06/20/2013 04:10:09 MDT

No reproduction or networking permitted without license from IHS

--`,`,`,,``,`,````,,,``,``,,,,,,-`-`,,`,,`,`,,`---

5.2.3 Condition—Fasteners shall be furnished in the condi-

tion speciﬁed for the property class in Table 2. If other

conditions are required, the condition and resultant mechanical

properties shall be as agreed upon between the manufacturer

and the purchaser.

5.2.4 Surface Finish—Fasteners shall have a surface ﬁnish

produced in accordance with Practice A 380.

5.2.5 Protective Finishes—Unless otherwise speciﬁed, fas-

teners shall be furnished without an additive chemical or

metallic ﬁnish.

TABLE 2 Mechanical Property Requirements

Property

Class

Condi-

tion

Alloy/

Mechanical

Property

Marking

Nominal

Thread

Diameter

Product

Length

Full Size Product Tests Machined Specimen Tests Hardness

Tensile

Strength,

MPa

Yield

Strength,

MPa

C,D

Exten-

sion

Torsional

Strength,

N·m

Tensile

Strength,

MPa

Yield

Strength,

MPa

Elonga-

gation,

Vickers Rockwell

min min min min min min min min max min max

A1-50 F 738A M1.6–M5 all 500 . . . . . . Table 6 . . . . . . . . . . . . 165 . . . B85

A2-50 AF F 738B M6–M36 all 500 210 0.6D. . . 500 210 30 . . . 165 . . . B85

A4-50 F 738C

A1-70 F 738D M1.6–M5 8D700 . . . . . . Table 6 . . . . . . . . . 220 330 B96 C33

A2-70 CW F 738E M6–M20 8D700 450 0.4D. . . 650 400 20 220 330 B96 C33

A4-70 F 738F over

M20–M36

8D550 300 0.2D

. . . 520 270 25 160 310 B83 C31

M1.6–M5 8D800 . . . . . . Table 6 . . . . . . . . . 240 350 C23 C36

A1-80 F 738G M6–M20 8D800 600 0.3D. . . 780 600 12 240 350 C23 C36

A2-80 SH F 738H over

M20–M24

8D700 500 0.2D. . . 680 480 15 220 330 B96 C33

A4-80 F 738J over

M24–M30

8D650 400 0.2D. . . 620 370 20 200 310 B93 C30

over

M30–M36

8D600 300 0.2D. . . 570 270 28 180 285 B89 C28

F1-45 AF F 738K M1.6–M5 all 450 . . . . . . . . . . . . . . . . . . . . . 165 . . . B85

M6–M36 all 450 250 0.2D. . . 450 250 25 . . . 165 . . . B85

F1-60 CW F 738L M1.6–M5 8D600 ... ... ... ... ... ... 180 285 B89 C28

M6–M36 8D600 410 0.2D. . . 550 360 20 180 285 B89 C28

C1-50

C4-50 A

F 738M

F 738N

M1.6–M5

M6–M36

all

500

...

250

...

0.2D

...

500

...

250

...

165

...

B85

C1-70

C4-70 H

F 738P

F 738R

M1.6–M5

M6–M36

all

700

...

410

...

0.2D

...

700

...

410

...

220

330

B96

C34

C1-110

C4-110 HT

F 738S

F 738T

M1.6–M5

M6–M36

all

1100

...

820

...

0.2D

...

1100

...

820

...

350

440

C36

C45

C3-80 H F 738U M1.6–M5 all 800 . . . . . . . . . . . . . . . . . . 240 340 C23 C35

M6–M36 all 800 640 0.2D. . . 800 640 15 240 340 C23 C35

C3-120 HT F 738V M1.6–M5 all 1200 . . . . . . . . . . . . . . . . . . 380 480 C39 C48

M6–M36 all 1200 950 0.2D. . . 1200 950 10 380 480 C39 C48

P1-90 AH F 738W M1.6–M5 all 900 . . . . . . . . . . . . . . . . . . 285 370 C28 C38

M6–M36 all 900 700 0.2D. . . 900 700 16 285 370 C28 C38

Legend of conditions:

AF — headed and rolled from annealed stock and then reannealed.

CW — headed and rolled from annealed stock, thus acquiring a degree of cold work; products with nominal thread diameters larger than M20 may be hot-worked and

solution annealed.

SH — machined from strain-hardened stock or cold worked to develop the speciﬁed properties.

A — machined from annealed or solution-annealed stock, thus retaining the properties of the original material.

H — hardened and tempered at 565°C minimum.

HT — hardened and tempered at 275°C minimum.

AH — solution-annealed and age-hardened after forming.

For product lengths:

“all” means all lengths

“8D” means 8 times nominal diameter maximum.

Tensile strength and yield strength values for full-size products of each property class are given in table on yield and tensile strength.

Yield strength is the stress at which an offset of 0.2 % gage lingth occurs.

Extension measurement is determined in accordance with the test procedure speciﬁed in 10.2.3.

Torsional strength requirements apply only to austenitic steel fasteners with nominal thread diameters M5 and smaller. Values are given in table on torsional strength.

F 738M – 02 (2008)

Provided by IHS under license with ASTM

Licensee=ISATIS Group http://st2014.ir

Not for Resale, 06/20/2013 04:10:09 MDT

No reproduction or networking permitted without license from IHS

--`,`,`,,``,`,````,,,``,``,,,,,,-`-`,,`,,`,`,,`---

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 F738M - 02 (2008) 是一项由美国材料与试验协会制定的国际标准，专门针对公制不锈钢螺栓、螺钉和螺柱的技术要求。该标准涵盖了多种不锈钢材料等级（如奥氏体、铁素体和马氏体不锈钢），并规定了机械性能、化学成分、尺寸公差、表面处理及标记等关键指标。2008年重新批准的版本延续了2002年原版的核心规范，确保产品在高温、腐蚀性环境及高应力工况下的可靠性与一致性。该标准广泛应用于化工、食品加工、海洋工程及建筑结构等需要耐腐蚀连接的领域，是跨国采购、质量检验和工程设计的重要参考依据。通

展开>> 收起<<

ASTM F738M - 02 (2008).pdf

共9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 F738M - 02 (2008)

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: