ASTM A1028-03

Standard Specification for Stainless Steel Bars for Compressor and Turbine Airfoils

ABSTRACT
This specification covers stainless steel bars for compressor and turbine bucket, blade, and airfoil applications. Materials shall be produced by basic electric furnace melting process with argon-oxygen-decarburization refining or by vacuum ladle degassing. Electro-slag remelting shall also be conducted unless otherwise specified by the purchaser. Two complete heat treatments, consisting of an austenize, quench, and temper, shall be conducted. Straightening, stress relieving, and water or oil quenching shall be executed as well. Steel bars shall adhere to chemical composition and mechanical property requirements, including tensile strength, yield strength, elongation, reduction of area, impact strength, and Brinell hardness.
SCOPE
1.1 This specification covers stainless steel bars for compressor and turbine bucket, blade, and airfoil applications.
1.2 The values stated in inch-pound units are to be considered the standard.

General Information

• Status: Historical
• Publication Date: 09-Apr-2003
• ICS: 77.140.20 - Stainless steels
• Technical Committee: A01 - Steel, Stainless Steel and Related Alloys
• Drafting Committee: A01.17 - Flat-Rolled and Wrought Stainless Steel

Relations

• Replaced By: ASTM A1028-03(2009) - Standard Specification for Stainless Steel Bars for Compressor and Turbine Airfoils
• Effective Date: 01-May-2009

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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
Designation: A 1028 – 03
Standard Specification for
Stainless Steel Bars for Compressor and Turbine Airfoils
This standard is issued under the fixed designation A1028; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope 4.1.1 Quantity (weight or number of pieces).
4.1.2 Grade and Class (Table 3).
1.1 This specification covers stainless steel bars for com-
4.1.3 Applicable dimensions including size, thickness,
pressor and turbine bucket, blade, and airfoil applications.
width, and length.
1.2 The values stated in inch-pound units are to be consid-
4.1.4 Whetherbarsaretoberolledasbarsorcutfromplate.
ered the standard.
4.1.5 Supplementary Requirements.
2. Referenced Documents
5. General Requirements
2.1 ASTM Standards:
5.1 Product furnished to this specification shall conform to
A275/A275M Test Method for Magnetic Particle Exami-
therequirementsofSpecificationA484/A484Mincludingany
nation of Steel Forgings
supplementary requirements that are indicated in the purchase
A484/A484M Specification for General Requirements for
order. Failure to comply with the general requirements of
Stainless Steel Bars, Billets, and Forgings
SpecificationA484/A484M constitutes nonconformance with
A 700 Practices for Packaging, Marking, and Loading
this specification.
Methods for Steel Products for Domestic Shipment
5.2 In case of conflict between the requirements of this
A941 Terminology Relating to Steel, Stainless Steel, Re-
specification and Specification A484/A484M, this specifica-
lated Alloys, and Ferroalloys
tion shall prevail.
E112 Test Methods for Determining Average Grain Size
E 292 Test Methods for Conducting Time-for-Rupture
6. Manufacture
Notch Tension Tests of Materials
6.1 Melting Process—The steel shall be made using the
E381 Method of Macroetch Testing Steel Bars, Billets,
Basic Electric Furnace Process with Argon-Oxygen-
Blooms, and Forgings
Decarburization (AOD) refining or by Vacuum Ladle Degas-
E562 Test Method for Determining Volume Fraction by
5 sing. Use of Electro-Slag Remelting is permitted unless other-
Systematic Manual Point Count
wise specified by the purchaser (see Supplemental
3. Terminology Requirement S1).
6.2 Heat Treatment—Heat treating of all bars is required in
3.1 Refer to Terminology A941 for definitions of terms
accordance with Table 1 to develop the required mechanical
used in this standard.
properties.
4. Ordering Information 6.2.1 Number of Heat Treatments—Two complete heat
treatments,consistingofanaustenitize,quenchandtemper,are
4.1 It is the responsibility of the purchaser to specify all
permitted. Purchaser approval is required prior to any addi-
requirements that are necessary for product under this specifi-
tional heat treatments.
cation.Suchrequirementstobeconsideredmayincludebutare
6.2.2 Temperature Variation—Heat treating temperatures
not limited to the following:
shall be controlled in the range of 625°F.
6.3 Stress Relief—When heat treatment for mechanical
This specification is under the jurisdiction ofASTM CommitteeA01 on Steel,
properties is followed by straightening, a stress relieving heat
Stainless Steel and RelatedAlloys and is the direct responsibility of Subcommittee
treatment is required in accordance with Table 1.
A01.17 on Flat-Rolled and Wrought Stainless Steel.
Current edition approved April 10, 2003. Published May 2003.
6.3.1 QuenchingafterStressRelief—Wateroroilquenching
Annual Book of ASTM Standards, Vol 01.05.
of stress-relieved bars is prohibited.
Annual Book of ASTM Standards, Vol 01.03.
Annual Book of ASTM Standards, Vol 01.01.
Annual Book of ASTM Standards, Vol 03.01.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
A1028–03
TABLE 1 Heat Treatment, °F
Grade A Grade B Grade C Grade D Grade E Grade F
Classes 1 and 2 Class 1 Class 1 Class 2 Classes 1 and 2 Class 1 Class 2 Class 1
Austenitizing 1725-1775 1600-1750 1825 to 1875 1725 to 1875 1875 to 1925 2075 to 2125 1725 to 1775 1875 to 1925
Quenching Air or liquid Air or liquid Air or liquid Air or liquid Air or liquid Air or liquid Air or liquid Air or liquid
First temper 1100 min 1100 min 1050 min 1000 min 1150 min 1250 min 1100 min . . .
Second temper . . . . . . 1025 min 1000 min . . . . . . . . . . . .
Aging . . . . . . . 1135to1165
Stress Relieving 1065 min 1065 min 1000 min 1000 min 1100 min 1200 min 1050 min 1100 min
TABLE 2 Chemical Requirements
Composition %
Grade A Grade B Grade C Grade D Grade E Grade F
UNS Designation S41000 S41005 S41428 S42225 S41041 S17400
Carbon 0.15 max 0.10 to 0.15 0.10 to 0.17 0.20 to 0.25 0.13 to 0.18 0.07 max
Manganese 1.0 max 0.25 to 0.80 0.65 to 1.05 0.5 to 1.0 0.4 to 0.6 1.0 max
Phosphorus, max 0.018 0.018 0.020 0.020 0.030 0.040
Sulfur, max 0.015 0.015 0.015 0.010 0.030 0.030
Silicon 0.5 max 0.5 max 0.10 to 0.35 0.20 to 0.50 0.5 max 1.0 max
Nickel 0.75 max 0.75 max 2.25 to 3.25 0.5 to 1.0 0.5 max 3.0 to 5.0
Chromium 11.5 to 13.0 11.5 to 13.0 11.25 to 12.75 11.0 to 12.5 11.5 to 13.0 15.0 to 17.5
Molybdenum 0.5 max 0.5 max 1.5 to 2.0 0.9 to 1.25 0.20 max . . .
Vanadium . . . Report only 0.25 to 0.40 0.20 to 0.30 . . . . . .
Tungsten . . . 0.10 max 0.10 max 0.9 to 1.25 . . . . . .
Nitrogen . . . 0.08 max 0.020 to 0.045 Report only . . . . . .
Aluminum . . . 0.025 max 0.025 max 0.025 max 0.05 max . . .
Columbium . . . 0.20 max . . . 0.05 max 0.15 to 0.45 0.15 to 0.45
Cobalt . . . . . . . . . 0.20 max . . . . . .
Titanium . . . 0.05 max 0.05 max 0.025 max . . . . . .
Copper . . . 0.50 max 0.50 max 0.15 max . . . 3.0 to 5.0
Tin . . . 0.05 max 0.05 max 0.02 max . . . . . .
TABLE 3 Tensile, Impact, and Hardness Requirements
Grade A Grade B Grade C Grade D Grade E Grade F
Class 1 Class 2 Class 1 Class 1 Class 2 Class 1 Class 2 Class 1 Class 2 Class 1
Tensile strength, min, ksi 100 110 110 145 160 140 140 115 110 135
Yield strength, min, ksi, 0.2 % offset 70 80 90 115 120 90 100 75 80 105
Elongation in 2 in., min, % 20 18 18 15 16 13 13 15 18 16
Reduction of area, min, % 60 50 50 30 50 30 35 50 55 50
Impact strength, min, av., Cv, Rt, ft-lb 30 25 30 30 40 8 10 20 25 41
Hardness, Brinell, max 255 269 269 352 375 331 331 277 262 341
7. Chemical Composition 8.3.1 Test Specimen Location—The axis of the specimen
shallbelocatedatthecenterofthebarsuptoandincluding1 ⁄2
7.1 Thesteelshallconformtotherequirementsforchemical
in. width. For bars over 1 ⁄2 in. width, the axes of the specimen
composition prescribed in Table 2.
shall be located midway between the center and the edge
(corner) of the bar.
8. Mechanical Properties
8.1 Lot Size—Alot shall consist of all bars of the same size
9. Workmanship and Nondestructive Examination
from one electric furnace heat of steel and heat treated, either
9.1 GeneralRequirements—All bars shall be free of cracks,
in the same charge in either a batch furnace or a continuous
fissures, seams, laps, bursts, shrinkage, and similar disconti-
type furnace.
nuities.
8.2 Hardness Tests—All testing shall be performed after
9.2 Nondestructive Tests—Nondestructive testing and cor-
heat treatment and stress relief, as applicable. The test speci-
responding acceptance criteria shall be as specified by the
mens shall meet the requirements of Table 3.
purchaser.
8.2.1 NumberofTests—Aminimum of four bars or 10% of
the lot, whichever is less, shall be tested on each end.
10. Dimensions, Tolerances, and Finish
8.3 Tensile and Impa
...