ASTM A440 - 75 scan

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Designetion: A
440
_
75
SUP
ER
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1
1American National Standards Institute
AMERICAN SOCIETY FOR TESTING AND MATERIALS
1916 Race St., Philadelphia, Pa., 19103
Reprinted from the Annual Book
of
ASTM
Standards, Copyright
ASTM
If
not listed in the current combined Index. will
appear
in the next edition.
Standard Specification
for
HIGH-STRENGTH
STRUCTURAL
STEEL1
This Standard
is
issued under the fixed designation A440; 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.
I.
Scope
1.1
This specification covers high-strength
steel shapes, plates, and bars
of
structural
quality intended primarily for use
in
the
con-
struction
of
riveted
or
bolted bridges and
buildings and for other special structural pur-
poses, where saving
in
weight is important.
The
atmospheric corrosion resistance of this
steel
is
approximately twice
that
of structural
carbon steel. This specification
is
limited to
material
up
to 4in.
(\02
mm)
inclusive
in
thickness.
NOTE
I-The
values
stated
in U.S.
customary
units
are
to
be
regarded
as
the
standard.
2. General Requirements for Delivery
2.1
Material furnished under this specifica-
tion shall conform
to
the applicable
require~
ments of the current edition
of
Specification
A 6 for General Requirements for Delivery
of
Rolled Steel Plates, Shapes, Sheet Piling, and
Bars for Structural Use.2
2.2 Welding
of
defects shall be done with a
welding electrode conforming to classification
£7015 or £7016 of
AWS
Specifications A
5.1
for Mild Steel Covered Arc-Welding Elec-
trodes.3
3. Process
3.1
The
steel shall be made by either the
open-hearth, basic-oxygen,
or
electric-furnace
process.
4. Chemical Requirements
4.1
The
heat analysis shall conform to the
requirements prescribed
in
Table
I.
4.2 The steel shall conform on product
analysis
to
the requirements prescribed
in
Table I, subject to the product analysis toler-
ances
in
Specification A6.
5. Tensile Requirements
5.1
The
material
as represented
by
the test
specimens shall conform
to
the tensile proper-
ties prescribed
in
Table
2.
5.2
For
material
under
'Itt>
in. (7.94 mm)
in thickness
or
diameter, as represented
by
the test specimen, adeduction from the per-
centage elongation in 8in. (200
mm),
speci-
fied in
Table
2.
of
1.25% shall be
made
for each
decrease of
'h2
in. (0.79
mm)
of the specified
thickness
or
diameter
below
5;16
in.
1This specification
is
under the jurisdiction of ASTM
Committee
A-Ion
Stee\, StainIe,s Steel and Related
AL-
loys. and
is
the direct responsibility of Subcommittee
AO
1.02
on
Structural
Steel for Bridges. Buildings. Rolling
Stock. and Ships.
Current edition approved July 25. 1975. Published
OClO-
ber 1975. Originally published as A440 -
59
T.
Last
previous edition A440 -74.
•Annual Book
of
ASTM
Standards,
Part
4.
3Available from American Welding Society.
2501
North
West 7th St., Miami. Fla. 33125.
SUPPLEMENT
AR
Y
REQUIREM
ENTS
Standardized supplementary requirements for use
at
the option of the purchaser are
listed in Specification A
6.
Those
which are considered suitable for use with this speci-
fication are listed below by title.
S14. Bend Test.
1
TABLE IChemical Requirements
Heal Analysis,
%
Carbon, max
Manganese
Phosphorus, max
Sulfur, max
Silicon, max
Copper, min
0.28
1.10-1.60
0.04
0.05
0.30
0.20
TABLE 2
TeUle
Req_irellHlnts
Plates and
Bars·
Structural Shapesb
For
For
IFor
Thicknesses Thicknesses
Thicknesses over
3/
4to over
Ilh
to Groups Groups
3j;
in.
11
/2
in.
(19
4
in.
(~
I
and
2Group JI4and 5
(19 mm) to 38 mm).
to
102 mm),
and under incl incl (
Tensile strength, min, psi 70 000 (485) 67 000 (460) 63 000 (435)
70000(485)
67 000 (460) 63 000 (435)
(MPa)
I
Yield peint min, psi
50000
(345)
46
000
(315)
42
000(290)
50
000
(345)
46
000
(315) 42
000
(290)
(MPa)
Elongation
in
8
in.
or
200
18
c•d
••
18d,.
l&d,.
IS'
18
18
mm, min, %i".
Elongation in 2
in.
or
50;
...
"
21
d
..
2Id
••
21'
... .
..
mm, min, %I
I
o
For
plates.
w.i4er
tllan
24
in. (610 mm),
tbe
test specimen
is
taken
in
tbe
transverse
dir<cction.
See 7.1.2
of
Specifi.
caUonA6."
"
~
See Specification
A.~,
Table A.
<See
5.2.
dElongation not required
to
be determined for Roor piatC.
•
For
plateswider tban
24
in. (610 mm), the
elooptioo
requirement is
roduc:ed
two
,*ce~
poiAts.
I
For
wide tlailIe..".
ovcr426Ib/ft
cloneaboa in 2in.
(SO
mm)
of
1911
minimum applies.
By public/ltion
of'"
"/lMam
no
pMitiDn iJ
t.tcn
wid
raplet
to •
WltidJly
01
1lIIY
~-.t
"""
ill
COfffNction
,",n-
with, tlIId
th,
1I.mc.
$«iety
lor
Teld"t
IIIId MDtBiaIs does IfOl
"".".
tD
....
JIMW
....
""
lite
IIIIndllrd
aga;""'t
liability for iIJ/ri",.ment
oj
any
biters
Patmt
nor
",.,,,.,,
on,
..
h
HabltUy.
,"
"
.!
2,,
~;
..
~,
摘要：

ASTM A440 - 75 scan 是 ASTM（美国材料与试验协会）于1975年发布的旧版标准扫描件，专门针对高强度低合金结构钢的化学成分、力学性能及热加工要求进行了规定。该标准主要适用于铆接、螺栓连接或焊接的桥梁与建筑结构用钢材，其典型特征是通过添加钒、铌等元素提升强度，同时保持良好韧性。由于该标准已于1975年后被新版规范（如 ASTM A572、A588）替代或合并，但作为历史技术文档，其在材料追溯、老旧结构评估、以及科研与教育场景中仍具参考价值。用户搜索此文档通常是为了识别特定年代

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作者：Carl 分类：国外协会 价格：6星币 属性：2 页 大小：909.5KB 格式：PDF 时间：2024-09-02

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