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ASTM A125-96(2007)

(Specification)

Standard Specification for Steel Springs, Helical, Heat-Treated

Standard Specification for Steel Springs, Helical, Heat-Treated

ABSTRACT
This specification covers the standard for hot-coiled, heat-treated helical compression springs with tapered, closed, squared and ground ends made of hot-wrought round steel bars. Cross sections for hot-wrought round, square, and round-cornered square bars of steel of the bar diameter shall be taken into consideration when designing and calculating the solid height, spring rate, solid stress, and solid capacity. The spring shall undergo quenching and tempering to have sufficiently high hardness and withstand the stresses developed in testing. Springs with specific indentation diameter shall not exceed the specified Brinell hardness numbers. The spring shall meet the metallurgical requirement, end construction, physical requirements such as measurements, solid height, free height, loaded height, permanent set, uniformity of pitch, outside diameter and calculations of solid capacity and uncorrected solid stress.
SCOPE
1.1 This specification covers hot-coiled, heat-treated helical compression springs with tapered, closed, squared and ground ends made of hot-wrought round steel bars 3/8 in. (9.5 mm) and larger in diameter.
1.2 This specification also serves to inform the user of practical manufacturing limits, mechanical tests, and inspection requirements applicable to the type of spring described in 1.1.
1.3 Supplementary Requirements S1 to S8 inclusive of an optional nature are provided. They shall apply only when specified by the purchaser. Details of these supplementary requirements shall be agreed upon by the manufacturer and purchaser.
1.4 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only).

General Information

Status
Historical
Publication Date
28-Feb-2007
ICS
21.160 - Springs
Technical Committee
A01 - Steel, Stainless Steel and Related Alloys
Drafting Committee
A01.15 - Bars
Current Stage
Ref Project

Relations

Replaces
ASTM A125-96(2001) - Standard Specification for Steel Springs, Helical, Heat-Treated
Effective Date
01-Mar-2007
Replaced By
ASTM A125-96(2013) - Standard Specification for Steel Springs, Helical, Heat-Treated
Effective Date
01-Oct-2013
Referred By
ASTM F1370-92(2019)e1 - Standard Specification for Pressure-Reducing Valves for Water Systems, Shipboard
Effective Date
01-Mar-2007
Referred By
ASTM D3535-07a(2021) - Standard Test Method for Resistance to Creep Under Static Loading for Structural Wood Laminating Adhesives Used Under Exterior Exposure Conditions
Effective Date
01-Mar-2007
Referred By
ASTM F1508-96(2021) - Standard Specification for Angle Style, Pressure Relief Valves for Steam, Gas, and Liquid Services
Effective Date
01-Mar-2007

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ASTM A125-96(2007) - Standard Specification for Steel Springs, Helical, Heat-TreatedASTM A125-96(2007) - Standard Specification for Steel Springs, Helical, Heat-Treated
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ASTM A125-96(2007) - Standard Specification for Steel Springs, Helical, Heat-Treated
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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:A125 −96(Reapproved 2007)
Standard Specification for
1
Steel Springs, Helical, Heat-Treated
This standard is issued under the fixed designation A125; 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 (´) 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 3.1.2 Name of material,
3.1.3 A drawing or list showing required dimensions and
1.1 This specification covers hot-coiled, heat-treated helical
loads, and part number,
compression springs with tapered, closed, squared and ground
3.1.4 Packaging, marking and loading, and
3
endsmadeofhot-wroughtroundsteelbars ⁄8 in.(9.5mm)and
3.1.5 End use.
larger in diameter.
NOTE 1—A typical ordering description is: 500 springs Drawing 3303
1.2 This specification also serves to inform the user of
Rev. A. to ASTM A125, 1095 steel, for cyclical machine operation.
practical manufacturing limits, mechanical tests, and inspec-
Palletize, maximum weight 4000 lb.
tion requirements applicable to the type of spring described in
1.1.
4. Materials and Manufacture
1.3 Supplementary Requirements S1 to S8 inclusive of an
4.1 Material:
optional nature are provided. They shall apply only when
4.1.1 Unless otherwise specified, the springs shall be made
specified by the purchaser. Details of these supplementary
of carbon steel bars conforming to the requirements of Speci-
requirements shall be agreed upon by the manufacturer and
fication A689. Due to hardenability limitations of carbon steel,
purchaser.
5
it is suggested that the bar diameter be limited to 1 ⁄8 in. (41.8
1.4 Thevaluesstatedininch-poundunitsaretoberegarded
mm) max in order to withstand the maximum test stress
as the standard. The values given in parentheses are for
requirements of this specification.
information only).
4.1.2 If alloy steel is specified, the springs shall be made
fromalloysteelbarsconformingtoSpecificationA689.Anyof
2. Referenced Documents
the alloy steel grades referred to may be used at the option of
2
2.1 ASTM Standards:
the spring manufacturer, providing that a minimum as-
A29/A29MSpecification for Steel Bars, Carbon and Alloy,
quenched hardness of Rockwell HRC-50 will be achieved at
Hot-Wrought, General Requirements for
the center of the bar section representing the spring when
A689Specification for Carbon and Alloy Steel Bars for
quenched in the same media and manner as the spring.
Springs
4.1.3 Springs Made from Bars Over 2 in. (50.8 mm)—Note
E10Test Method for Brinell Hardness of Metallic Materials
that the bias tolerance (reference Specification A29/A29M,
E112Test Methods for Determining Average Grain Size
TableA1.1 on Permissible Variations in Cross Section for
E709Guide for Magnetic Particle Testing
Hot-Wrought Round, Square, and Round-Cornered Square
Bars of Steel) of the bar diameter shall be taken into consid-
3. Ordering Information
eration when designing and calculating the solid height, spring
3.1 Orders for springs under this specification shall include
rate, solid stress, and solid capacity.
the following information:
4.2 Hardness:
3.1.1 Quantity,
4.2.1 The springs must be quenched and tempered to a
sufficiently high hardness (strength) to withstand the stresses
1
This specification is under the jurisdiction ofASTM Committee A01 on Steel, developed in testing the finished spring. The maximum hard-
Stainless Steel and RelatedAlloysand is the direct responsibility of Subcommittee
ness shall not exceed 477 Brinell numbers (2.80 mm indenta-
A01.15 on Bars.
tion diameter).
Current edition approved March 1, 2007. Published July 2007. Originally
4.2.2 When hardness limits are specified, the total range or
approved in 1929. Last previous edition approved in 2001 as A125–96 (2001).
DOI: 10.1520/A0125-96R07.
spread may not be less than 0.15 mm difference in indentation
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
diameters. The specified or indicated minimum hardness must
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
be sufficient to develop the required strength to withstand the
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. solid stresses of the spring design involved.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
A125−96 (2007)
TABLE 2 Brinell Hardness
4.2.3 Hardness shall be read on a prepared flat surface in an
area not detrimental to the life of the spring at a full section Indentation Diameter, mm Brinell Hardness Numbers
after
...

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