ASTM A536 - 84 (2019)e1

VIP免费

Carl 2024-09-02 22 214.45KB 6 页 14星币

Designation: A536 −84 (Reapproved 2019)
´1
Standard Speciﬁcation for
Ductile Iron Castings
1
This standard is issued under the ﬁxed designation A536; 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 U.S. Department of Defense.
ε
1
NOTE—Footnote 3 was editorially corrected in May 2019.
1. Scope
1.1 This speciﬁcation covers castings made of ductile iron,
also known as spheroidal or nodular iron, which is described as
cast iron with the graphite substantially spheroidal in shape and
essentially free of other forms of graphite, as deﬁned in
Terminology A644.
1.2 No precise quantitative relationship can be stated be-
tween the properties of the iron in various locations of the same
casting or between the properties of castings and those of a test
specimen cast from the same iron (see Appendix X1).
1.3 The values stated in inch-pound units are to be regarded
as standard. The values given in parentheses are mathematical
conversions to SI units that are provided for information only
and are not considered standard.
1.4 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:
2
A370 Test Methods and Deﬁnitions for Mechanical Testing
of Steel Products
A644 Terminology Relating to Iron Castings
A732/A732M Speciﬁcation for Castings, Investment, Car-
bon and Low Alloy Steel for General Application, and
Cobalt Alloy for High Strength at Elevated Temperatures
E8/E8M Test Methods for Tension Testing of Metallic Ma-
terials
2.2 Military Standard:
3
MIL-STD-129 Marking for Shipment and Storage
3. Ordering Information
3.1 Orders for material to this speciﬁcation shall include the
following information:
3.1.1 ASTM designation,
3.1.2 Grade of ductile iron required (see Table 1, and
Sections 4and 9),
3.1.3 Special properties, if required (see Section 7),
3.1.4 If a different number of samples is required (see
Section 10),
3.1.5 Certiﬁcation, if required (see Section 14), and
3.1.6 Special preparation for delivery, if required (see Sec-
tion 15).
4. Tensile Requirements
4.1 The iron represented by the test specimens shall con-
form to the requirements as to tensile properties presented in
Tables 1 and 2. The irons listed in Table 1 cover those in
general use, while those listed in Table 2 are used for special
applications (such as pipes, ﬁttings, etc.).
4.2 The yield strength shall be determined at 0.2 % offset by
the offset method (see Test Methods E8/E8M). Other methods
may be used by mutual consent of the manufacturer and
purchaser.
5. Heat Treatment
5.1 The 60-40-18 grade will normally require a full ferritiz-
ing anneal. The 120-90-02 and the 100-70-03 grades generally
require a quench and temper or a normalize and temper, or an
isothermal heat treatment. The other two grades can be met
either as-cast or by heat treatment. Ductile iron, which is heat
treated by quenching to martensite and tempering, may have
substantially lower fatigue strength than as-cast material of the
same hardness.
1
This speciﬁcation is under the jurisdiction of the ASTM Committee A04 on
Iron Castings and is the direct responsibility of Subcommittee A04.02 on Malleable
and Ductile Iron Castings.
Current edition approved May 1, 2019. Published May 2019. Originally
approved in 1965. Last previous edition approved in 2014 as A536 – 84 (2014).
DOI: 10.1520/A0536-84R19E01.
2
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.
3
Available from General Services Administration – Vendor Support Center,
https://vsc.gsa.gov/administration/ﬁles/MIL-STD-129R.pdf.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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.
1
 

6. Test Coupons

6.1 The separately cast test coupons from which the tension

test specimens are machined shall be cast to the size and shape

shown in Fig. 1 or Fig. 2. A modiﬁed keel block cast from the

mold shown in Fig. 3 may be substituted for the 1-in. Y-block

or the 1-in. keel block. The test coupons shall be cast in open

molds made of suitable core sand having a minimum wall

thickness of 1

⁄

in. (38 mm) for the

⁄

-in. (12.5-mm) and 1-in.

(25-mm) sizes and 3 in. (75 mm) for the 3-in. size. The

coupons shall be left in the mold until they have cooled to a

black color (approximately 900 °F (482 °C) or less). The size

of coupon cast to represent the casting shall be at the option of

the purchaser. In case no option is expressed, the manufacturer

shall make the choice.

6.2 When investment castings are made to this speciﬁcation,

the manufacturer may use test specimens cast to size incorpo-

rated in the mold with the castings, or separately cast to size

using the same type of mold and the same thermal conditions

that are used to produce the castings. These test specimens

shall be made to the dimensions shown in Fig. 1 of Speciﬁca-

tion A732/A732M or Figs. 5 and 6 of Test Methods and

Deﬁnitions A370.

6.3 The manufacturer may use separately cast test coupons

or test specimens cut from castings when castings made to this

speciﬁcation are nodularized or inoculated in the mold. Sepa-

rately cast test coupons shall have a chemistry that is repre-

sentative of castings produced from the ladle poured and a

cooling rate equivalent to that obtained with the test molds

shown in Figs. 1 and 2,Figs. 4-6,orAppendix X2. The size

(cooling rate) of the coupon chosen to represent the casting

should be decided by the purchaser. If test coupon size is not

speciﬁed, the manufacturer shall make the choice. When test

bars will be cut from castings, test bar location shall be agreed

on by the purchaser and manufacturer and indicated on the

casting drawing. The manufacturer shall maintain sufficient

controls and control documentation to assure the purchaser that

properties determined from test coupons or test bars are

representative of castings shipped.

TABLE 1 Tensile Requirements

Grade

60-40-18

Grade

65-45-12

Grade

80-55-06

Grade

100-70-03

Grade

120-90-02

Tensile strength, min, psi 60 000 65 000 80 000 100 000 120 000

Tensile strength, min, MPa 414 448 552 689 827

Yield strength, min, psi 40 000 45 000 55 000 70 000 90 000

Yield strength, min, MPa 276 310 379 483 621

Elongation in 2 in. or 50 mm, min, % 18 12 6.0 3.0 2.0

TABLE 2 Tensile Requirements for Special Applications

Grade

60-42-10

Grade

70-50-05

Grade

80-60-03

Tensile strength, min, psi

Tensile strength, min, MPa

60 000

415

70 000

485

80 000

555

Yield strength, min, psi

Yield strength, min, MPa

42 000

290

50 000

345

60 000

415

Elongation in 2 in. or 50 mm,

min, %

10 5 3

Metric Equivalents

in. mm in. mm

⁄

12.7

25.4

⁄

38.1

63.5

NOTE 1—The length of the keel block shall be 6 in. (152 mm).

FIG. 1 Keel Block for Test Coupons

Dimen-

sions

Y-Block Size

For Castings

of Thickness

Less Than

⁄

in.

(13 mm)

For Castings

of Thickness

⁄

in.

(13 mm) to

⁄

in.

(38 mm)

For Castings

of Thickness

of 1

⁄

in.

(38 mm)

and Over

in. mm in. mm in. mm

⁄

13 1 25 3 75

⁄

40 2

⁄

54 5 125

C 2 50 3 75 4 100

D 4 100 6 150 8 200

E 7 175 7 175 7 175

approx approx approx approx approx approx

FIG. 2 Y-Blocks for Test Coupons

A536 − 84 (2019)

´1

6.4 The test coupons shall be poured from the same ladle or

heat as the castings they represent.

6.5 Test coupons shall be subjected to the same thermal

treatment as the castings they represent.

FIG. 3 Mold for Modiﬁed Keel Block

FIG. 4 Sectioning Procedure for Y-Blocks

A536 − 84 (2019)

´1

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 A536 - 84 (2019)e1 是一项由美国材料与试验协会（ASTM）发布的标准化规范，涵盖了对铁素体可锻铸铁（又称球墨铸铁）的等级、力学性能、化学成分及试验方法的技术要求。该标准最初于1984年发布，并在2019年进行了重新确认（版本号中的“e1”表示编辑性修订）。其规定了不同级别的球墨铸铁（如60-40-18、65-45-12、80-55-06等）在抗拉强度、屈服强度、延伸率及硬度方面的具体指标，适用于承受高应力、冲击或耐磨要求的铸件，例如汽车零部件、管道配件、机械结构件等。

展开>> 收起<<

ASTM A536 - 84 (2019)e1.pdf

共6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 A536 - 84 (2019)e1

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: