ASTM A850-85

Specification for Steel Bars, Carbon Manganese Merchang Quality with 50 KSI (345 MPA) Yield Point (Withdrawn 1990)

General Information

• Status: Withdrawn
• Withdrawal Date: 31-May-1990
• ICS: 77.140.70 - Steel profiles
• Technical Committee: A01 - Steel, Stainless Steel and Related Alloys
• Drafting Committee: A01.15 - Bars

Standards Content (Sample)

~~l~ Designation: A 850 - 85
Standard Specification for
Steel Bars, Carbon-Manganese, Merchant Quality with 50 ksi
1
(345 MPa) Yield Point
This standard is issued under the fixed designation A 850; 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.
practice and grain size are at the manufacturers option.
I. Scope
3.3 Unless otherwise specified, the bars shall be furnished
1.1 This specification covers hot-wrought merchant
as rolled and not pickled, blast cleaned, or oiled.
quality carbon-manganese steel bars and bar size shapes
produced to mechanical property requirements and intended
4. Ordering Information
for noncritical constructional applications (see 3.2).
4.1 Orders under this specification shall include the fol-
1.2 Merchant quality hot-wrought steel bar is available in.
lowing requirements:
the following ranges of size and sedion:
4.1.l Quantity (weight or number of pieces),
1.2. l Rounds, squares, and hexagons with diameters or
4.1.2 Dimensions (cross-sectional shape, size, and length),
distance across flats under 3 in. (76.2 mm).
4.1.3 Name of material (merchant quality carbon steel
1.2.2 Bar size shapes with maximum dimensions under 3
bars),
in.
4.1.4 ASTM specification designation and year of issue,
1.2.3 Other bar sections with weight per foot under 40.84
4. I. 5 Class,
lb/ft (60.78 kg/m).
4.1.6 Heat analysis or test report (request, if required),
1.2.4 Flats 6 in. (152 mm) or under in width, over 0.203
4.1. 7 Application and processing, and
in. (5.15 mm) in thickness, and under 40.84 lb/ft (60.78
2 2
4.1.8 Supplem.entary requirements (if required)
kg/m) or 12 in. (77.4 cm ) in cross-sectional area.
1.2.5 Flats over 6 in. to 8 in. (203 mm), inclusive in width,
5. Materials and Manufacture
0.230 in. (5.84 mm) and over in thickness and under 40.84
2
5.1 The steel shall be made by the open-hearth, basic­
lb/ft (60.78 kg/m) or 12 in.2 (774 cm ) in cross-sectional
oxygen, or electric furnace process.
area.
1.2.6 Hot-wrought merchant quality steel bars, subject to
6. Chemical Composition
mechanical property requirements, are furnished in straight
6.1 Heat Analysis-the steel shall conform to the fol­
lengths only.
lowing requirements as to chemical composition:
1.3 The values stated in inch-pound units are to be
regarded as the standard. Element Class I
Class 2
Carbon, max %
0.27 0.27
Manganese, max %
1.45 1.45
2. Referenced Documents
Phosphorus, max %
0.04 0.04
Sulfur, max% 0.05 0.05
2.1 ASTM Standards:
Copper, when copper steel is specified, min %
0.20
A 29/ A 29M Specification for General Requirements for
6.2 The material furnished shall not exceed a carbon
Steel Bars, Carbon and Alloy, Hot-Wrought and Cold
equivalent of 0.48 % on heat analysis as determined by the
Finished'
following formula:
A 370 Methods and Definitions for Mechanical Testing of
3
Steel Products
CE C Mn (Cr + Mo + V) (Ni + Cu)
~ +6+ 5 + 15
7. Tensile Properties
3. General Requirements
7. l The material, as represented by the test specimens,
3.1 Material furnished under this specification shall con­
form to the requirements of the current edition of Specifica­ shall conform to the tensile properties shown in Table l.
1.2 and 3.2. 7 .1.2 Test specimens shall be prepared for testing from the
tion A 29/A 29M except as stated in
material in its as wrought condition. The tension specimen
3.2 Merchant quality bars shall be free from visible pipe,
may be aged as described in Methods A 370.
however, they may contain pronounced chemical segrega­
tion. Internal porosity, surface seams, and other surface 7. l.3 Test specimens shall be taken longitudinally and
irregularities may be present in_ this quality. Deoxidation may be tested in full thickness or section, or they may be
TABLE 1 Tensile Properties
1
This specification is under the jurisdiction of ASTM Committee A-1 on Steel,
Tensile Strength, ksi (MPa)
70-99 (485-685)
Stainless Steel, and Related Alloys and is the direct responsibility of Subcommittee
Yield Point, min., ksi
50 (345 MPa)
AOl.15 on Bars.
Elongation in 8.0 in. or 200 mm, min., %
14
Current edition approved Nov. 11, 1985. Published December 1985.
2 ElongatiOn in 2.0 in. or 50 mm, min.,%
18
Annual Book of ASTM Standards, Vol 01.05.
Gage length
3
Annual Book of ASTM Standards, Vols 01.01-01.05.
644

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~~ A 850
machined to the dimensions shown in Figs. 4 or 5 of in. or 50 mm specified in Table I of 1.00 % shall be made for
Methods A 370. If test specimens are selected conforming to each 1 in. (25 mm) of specified thickness or diameter or
the dimensions of Fig. 5, they shall be machined from a
fraction thereof over 2 in.
...