ASTM A942/A942M-95(2012)e1

Standard Specification for Centrifugally Cast White Iron/Gray Iron Dual Metal Abrasion-Resistant Roll Shells

SCOPE
1.1 This specification covers double pour, centrifugally cast, abrasion-resistant roll shells for general application. The outer layer is white iron and the inner layer is gray iron. There shall be no gradient of mottled iron between the white iron and the gray iron.  
1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.  
1.2.1 Within the text, the SI units are shown in brackets.

General Information

• Status: Historical
• Publication Date: 30-Sep-2012
• ICS: 77.140.50 - Flat steel products and semi-products
• Technical Committee: A04 - Iron Castings
• Drafting Committee: A04.01 - Grey and White Iron Castings

Relations

• Replaces: ASTM A942-95(2012) - Standard Specification for Centrifugally Cast White Iron/Gray Iron Dual Metal Abrasion-Resistant Roll Shells
• Effective Date: 01-Oct-2012

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
´1
Designation:A942/A942M −95 (Reapproved 2012)
Standard Specification for
Centrifugally Cast White Iron/Gray Iron Dual Metal Abrasion-
Resistant Roll Shells
This standard is issued under the fixed designationA942/A942M; 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.
ε NOTE—Designation was converted to dual and editorial changes were made throughout in November 2013.
1. Scope 4.1.2 Quantity of castings required,
4.1.3 Required dimensions and thickness of white iron layer
1.1 Thisspecificationcoversdoublepour,centrifugallycast,
(8.1),
abrasion-resistant roll shells for general application. The outer
4.1.4 Surface condition—as cast or machined,
layer is white iron and the inner layer is gray iron. There shall
4.1.5 Type of white iron required for the outer layer of the
be no gradient of mottled iron between the white iron and the
casting (7.1),
gray iron.
4.1.6 Class of gray iron required for the inner layer (7.2),
1.2 The values stated in either SI units or inch-pound units
4.1.7 Certification, if required (Section 13), and
are to be regarded separately as standard. The values stated in
4.1.8 Special position of marking information, if required
each system may not be exact equivalents; therefore, each
(Section 14).
system shall be used independently of the other. Combining
4.2 Additional requirements may be agreed upon between
values from the two systems may result in non-conformance
the manufacturer and the purchaser.
with the standard.
1.2.1 Within the text, the SI units are shown in brackets.
5. Materials and Manufacture
2. Referenced Documents
5.1 Both the white and the gray irons may be melted by any
suitable melting process.
2.1 ASTM Standards:
A48/A48M Specification for Gray Iron Castings
5.2 The white iron portion of the casting shall be produced
E8 Test Methods for Tension Testing of Metallic Materials
by chemistry rather than chilling.
E10 Test Method for Brinell Hardness of Metallic Materials
6. Chemical Composition
3. Classification
6.1 A chemical analysis shall be performed by the manu-
3.1 The white iron portion of the casting shall be classified
facturer on both the white and gray irons. The chemical
by type based upon Brinell Hardness.
compositions shall be controlled to obtain the required me-
3.2 Thegrayironportionofthecastingshallbeclassifiedby
chanical properties.
class based upon tensile strength.
7. Mechanical Properties
4. Ordering Information
7.1 The white iron shall conform to the following require-
4.1 Orders for material to this specification shall include the
ments:
following:
Type I — 450 to 500 HB
4.1.1 Specification title, designation, and year of issue,
Type II — 500 to 550 HB
Type III — 550 to 600 HB
Type IV — 600 to 650 HB
This specification is under the jurisdiction of ASTM Committee A04 on Iron
7.2 The gray iron shall conform to the following require-
CastingsandisthedirectresponsibilityofSubcommitteeA04.01onGreyandWhite
ments:
Iron Castings.
Current edition approved Oct. 1, 2012. Published November 2012. Originally
Tensile Strength
approved in 1995. Last previous edition approved in 2007 as A942 – 95 (2007).
Class min, ksi min, [MPa]
DOI: 10.1520/A0942-95R12E01.
No. 20 20 [138]
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
No. 25 25 [172]
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
No. 30 30 [207]
Standards volume information, refer to the standard’s Document Summary page on
No. 35 35 [241]
the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
´1
A942/A942M−95 (2012)
8. Other Requirements 11.2 The tension test shall be performed in accordance with
Test Metho
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
´1
Designation: A942 − 95 (Reapproved 2012) A942/A942M − 95 (Reapproved 2012)
Standard Specification for
Centrifugally Cast White Iron/Gray Iron Dual Metal Abrasion-
Resistant Roll Shells
This standard is issued under the fixed designation A942;A942/A942M; 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.
ε NOTE—Designation was converted to dual and editorial changes were made throughout in November 2013.
1. Scope
1.1 This specification covers double pour, centrifugally cast, abrasion-resistant roll shells for general application. The outer
layer is white iron and the inner layer is gray iron. There shall be no gradient of mottled iron between the white iron and the gray
iron.
1.2 The values stated in either inch-poundSI units or SIinch-pound units are to be regarded separately as standard. Within the
text, the SI units are shown in brackets. The values stated in each system aremay not be exact equivalents; therefore, each system
mustshall be used independently of the other. Combining values from the two systems may result in nonconformancenon-
conformance with this specification.the standard.
1.2.1 Within the text, the SI units are shown in brackets.
2. Referenced Documents
2.1 ASTM Standards:
A48/A48M Specification for Gray Iron Castings
E8 Test Methods for Tension Testing of Metallic Materials
E10 Test Method for Brinell Hardness of Metallic Materials
3. Classification
3.1 The white iron portion of the casting shall be classified by type based upon Brinell Hardness.
3.2 The gray iron portion of the casting shall be classified by class based upon tensile strength.
4. Ordering Information
4.1 Orders for material to this specification shall include the following:
4.1.1 Specification title, designation, and year of issue,
4.1.2 Quantity of castings required,
4.1.3 Required dimensions and thickness of white iron layer (8.1),
4.1.4 Surface condition—as cast or machined,
4.1.5 Type of white iron required for the outer layer of the casting (7.1),
4.1.6 Class of gray iron required for the inner layer (7.2),
4.1.7 Certification, if required (Section 13), and
4.1.8 Special position of marking information, if required (Section 14).
4.2 Additional requirements may be agreed upon between the manufacturer and the purchaser.
5. Materials and Manufacture
5.1 Both the white and the gray irons may be melted by any suitable melting process.
5.2 The white iron portion of the casting shall be produced by chemistry rather than chilling.
This specification is under the jurisdiction of ASTM Committee A04 on Iron Castings and is the direct responsibility of Subcommittee A04.01 on Grey and White Iron
Castings.
Current edition approved Oct. 1, 2012. Published November 2012. Originally approved in 1995. Last previous edition approved in 2007 as A942 – 95 (2007). DOI:
10.1520/A0942-95R12.10.1520/A0942-95R12E01.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
´1
A942/A942M − 95 (2012)
6. Chemical Composition
6.1 A chemical analysis shall be performed by the manufacturer on both the white and gray irons. The chemical compositions
shall be controlled to obtain the required mechanical properties.
7. Mechanical Properties
7.1 The white iron shall conform to the following requirements:
Type I — 450 to 500 HB
Type II — 500 to 550 HB
Type III — 550 to 600 HB
Type IV — 600 to 650 HB
7.2 The gray iron shall conform to the following requirements:
Tensile Strength
Class min, ksi min, (MPa)
Class min, ksi min, [MPa]
...