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ASTM A490
Specification-NINGBO BOLT |
ASTM A490
Specification
ASTM A490 - Standard
Specification for Structural Heavy Hex Bolts, Alloy Steel, Heat Treated, 150 ksi
Minimum Tensile Strength with Type 1 & Type 3 Weathering Steel Bolting Class
This specification
covers two types of bolting grades quenched and tempered, manufactured from high
strength alloy steel. ASTM A490 Bolts are intended for used in structural
connections similar to ASTM A325/A325M but being produced from alloy steel
instead of medium carbon steel, possed high tensile strength. There are two
versions of this specification; ASTM A490 covering imperial sized high tensile
bolting and A490M for metric sized bolts. ASTM A490 covers two grades Type 1 &
Type 3, the later being weathering steel. Type 2 was withdrawn in 2002. Bolts
under this specification are manufactured from 1/2" to 1-1/2" in imperial & from
M12 to M36 in metric sizes. Ferrobend is a outstandig performer in providing
ASTM A490 Type 1 & Type 3 weathering steel bolts with zinc, cadmium or dacromet
coatings with EN 10204 Type 3.1 Certification.
ASTM A490 Bolt Grades
|
Grade |
Class |
|
Type 1 |
Medium
Carbon Alloy Steel |
|
Type 2 |
Withdrawn |
|
Type 3 |
Weathering
Steel |
ASTM A490 Chemical
Composition
|
Element |
Type 1
|
Type 3
|
|
Carbon |
0.20 - 0.53
(3/4" and smaller) |
0.30 - 0.48
(sizes through 1-3/8") |
|
0.30 - 0.53
(larger than 3/4") |
0.35 - 0.53
(for 1-1/2") |
|
Manganese,
min |
0.400 |
-- |
|
Phosphorus,
max |
0.035 |
0.040 |
|
Sulfur, max |
0.040 |
0.040 |
|
Copper |
0.20 - 0.60 |
-- |
|
Chromium,
min |
0.45 |
-- |
|
Nickel, min |
0.20 |
-- |
|
Molybdenum,
min |
0.15 |
-- |
ASTM A490 Mechanical
Properties
|
Nominal
Diameter, inch |
Tensile
Strength, min, ksi |
Yield
Strength, min, ksi |
Elongation in 4D, min, % |
Reduction
in Area, min, % |
|
1/2" to
1-1/2", Inclusive |
150 - 173 |
130 |
14 |
40 |
ASTM A490 Hardness
Requirements
|
Bolt
Size, mm |
Bolt
Length*, mm |
Brinell |
Rockwell
C |
|
min |
max |
min |
max |
|
1/2" to 1",
inclusive |
Less than
2D* |
311 |
352 |
33 |
39 |
|
1/2" to 1",
inclusive |
2D and over |
-- |
352 |
-- |
39 |
|
1-1/8" to
1-1/2", inclusive |
Less than
3D |
311 |
352 |
33 |
39 |
|
1-1/8" to
1-1/2", inclusive |
3D and over |
-- |
352 |
-- |
39 |
Note* : Heavy Hex
Structural Bolts 1" and smaller and shorter than 2D are subject only to minimum
and maximum hardness. Heavy hex structural bolts larger than 1" through 1-1/2"
inclusive in diameter and shorter than 3D are subject only to minimum and
maximum hardness.
ASTM A490 Heat
Treatment
Type 1 and Type 3
bolts shall be heat treated by quenching in oil from the austenitic temperature
and then tempered by reheating to a temperature of not less then 800＜F.
ASTM A490 Bolt
Marking
|
Grade |
Marking |
|
A490 Type 1 |
A490 |
|
A490 Type 3 |
A490 |
ASTM A490 Recommended
Nuts & Washers
|
Finish |
Bolt
Grade |
Nut Grade |
Washer
Grade |
|
Plain (no
coated) |
Type 1 &
Type 3 |
ASTM A563
Grade DH, Grade DH3 |
F436 Type 1
& Type 3 |
|
Coated in
accordance to ASTM F1136 |
Type 3 |
ASTM A563
DH3 |
F436 Type 3 |
|
Weathering
steel |
Type 1 &
Type 3 |
ASTM A563
Grade DH3 |
F436 Type 1
& Type 3 |
|
