ASTM A449

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Scope ASTM A449 covers headed bolts, rods, and anchor bolts in diameters ranging from 1/4" through 3" inclusive. It is a medium strength bolt manufactured from a medium carbon or alloy steel that develops its mechanical values through a heat treating process. It is intended for general engineering applications. ASTM A449 is virtually identical in chemistry and strength to ASTM A325 and SAE J429 grade 5. However, A449 is more flexible in the sense that it covers a larger diameter range and is not restricted by a specific configuration. TYPES TYPE 1 Plain carbon steel, carbon boron steel, alloy steel, or alloy boron steel. TYPE 2 Withdrawn 2003 TYPE 3 Weathering steel. MECHANICAL PROPERTIES Size

Tensile, Yield, Elong. %, RA %, ksi ksi min min 120 min 92 min 14 35

1/4 - 1 1-1/8 - 1105 min 81 min 1/2 1-5/8 - 3 90 min 58 min

14

35

14

35

RECOMMENDED NUTS and WASHERS Nuts Plain 1/4 - 11-5/8 - 3 1/2 A563B A563A Heavy Hex Hex

Galvanized 1/4 - 3 A563DH Heavy Hex

Wash ers F436

Dimensions per ASTM F436

B Bolt Size

Outside Diameter

1/2

1-1/16

5/8

1-5/16

3/4

1-15/32

7/8

1-3/4

1

2

1-1/8

2-1/4

1-1/4

2-1/2

1-3/8

2-3/4

1-1/2

3

1-5/8

3-1/4

1-3/4

3-3/8

1-7/8

3-1/2

2

3-3/4

2-1/4

4

A

C Thickne ss Inside Diameter Ma Min x 0.09 0.17 17/32 7 7 0.12 0.17 11/16 2 7 0.12 0.17 13/16 2 7 0.13 0.17 15/16 6 7 0.13 0.17 1-1/16 6 7 0.13 0.17 1-3/16 6 7 0.13 0.17 1-3/8 6 7 0.13 0.17 1-1/2 6 7 0.13 0.17 1-5/8 6 7 0.17 1-3/4 0.28 8 0.17 1-7/8 0.28 8 0.17 2 0.28 8 0.17 2-1/8 0.28 8 2-3/8 0.24 0.34

Weight in Pounds Per 1000 Pieces 18 33 41 64 82 105 133 163 200 320 307 360 380 560

B Bolt Size

Outside Diameter

2-1/2 2-3/4 3 3-1/4 3-1/2 3-3/4 4

4-1/2 5 5-1/2 6 6-1/2 7 7-1/2

A

C Thickne ss Inside Diameter Ma Min x 2-5/8 0.24 0.34 2-7/8 0.24 0.34 3-1/8 0.24 0.34 3-3/8 0.24 0.34 3-5/8 0.24 0.34 3-7/8 0.24 0.34 4-1/8 0.24 0.34

Weight in Pounds Per 1000 Pieces 720 920 1040 1350 1633 1880 2200

SAE J429 has the following requirements for a Grade 5 fastener: Medium carbon steel Carbon content = 0.28-0.55 Phosphorus = 0.030 max Sulfur = 0.050 max Quenched & tempered, with a minimum tempering temperature of 427 C (900 F)

Grade Marking

Specificati on

SAE J429 Grade 1 A307 Grade A

Material and Treatment

Mechanical Hardness Properties Rockwell Pro Tensil Nominal of Yield e Size (In.) Loa Stren Stren d gth Min Max gth Min Min Min (ksi (ksi) (ksi) )

Low or Medium Carbon Steel ¼" - 1½"

33

36

60

B70 B100

¼" - 4"

-

-

60

B69 B100

-

60 min 100 B69 B95 max

-

36

58 min 80 max

-

F1554 Grade 36

-

36

58 min 80 max

-

F1554 Grade 55

-

55

75 min 95 max

-

¼" - ¾"

55

57

74

B80 B100

⅞" - 1½"

33

36

60

B70 B100

30

75

-

92

120

C24 C35

81

105

C19 C31

A307 Grade B

-

A307 Grade C One End Green

*Replaced see note 7.

One End Blue

One End Yellow SAE J429 Grade 2

A193/A320 Grade B8

AISI SS304 Stainless No Restriction s

A193/A320 Grade B8M

AISI SS316 Stainless Steel

A325 Type 1

Medium Carbon ½" - 1" 85 Steel, Q & T 1⅛" - 1½" 74

B96

A325 Type 3

Atmospheric Corrosion Resistant Steel, Q&T ¼" - 1"

SAE J429 Grade 5

85

92

120

C25 C34

1⅛" - 1½" 74

81

105

C19 C30

85

92

120

C25 C34

1⅛" - 1½" 74

81

105

C19 C30

1⅝" - 3"

55

58

90

B91 B100

¼" - 1"

85

92

120

C25 C34

1⅛" - 1½" 74

81

105

C19 C30

1⅝" - 3"

58

90

B91 B100

105

125

95

115

75

100

C35

105 109

125

C26 C36

95

94

115

C22 C33

-

105

125 min 150 max

-

-

Medium Carbon Steel, Q & T ¼" - 1" A449 Type 1

A449 Type 3

Weathering Steel, Q & T

55

¼" - 2½" A193 Grade B7

2⅝" - 4"

-

4⅛" - 7" A354 Grade BC

¼" - 2½" Medium Carbon Alloy Steel, 2⅝" - 4" Q&T

F1554 Grade 105

¼" - 3"

One End Red

C35 -

C35

A320 Grade L7

AISI 4140, 4142, ¼" - 2½" or 4145

-

105

125

-

-

A320 Grade L43

AISI 4340

-

105

125

-

-

¼" - 4"

A490 Type 1

A490 Type 3

Medium Carbon Alloy Steel, Q & T ½" - 1½"

120 130

150 min 173 max

¼" - 1½"

120 130

150

C33 C39

¼" - 2½"

120 130

150

C33 C39

2⅝" - 4"

105 115

140

C31 C39

Atmospheric Corrosion Resistant Steel, Q&T

SAE J429 Grade 8 Medium Carbon Alloy Steel, Q & T A354 Grade BD

C33 C38

1. All specifications are ASTM unless otherwise noted. 2. All specifications shall be marked by the manufacturer with a unique identifier to identify the manufacturer or private label distributor, as appropriate. 3. Q & T - Quenched and Tempered. 4. Although markings are shown on hex heads, stamping is a requirement on one end of rods and studs. The exception is F1554 and A307 grade C in which stamping is a supplemental requirement while color coding is required. 5. Although markings are shown on hex heads, grade markings apply equally to products with other head configurations. 6. All Grade BD products shall be marked "BD". In addition to the "BD" marking, the product may be marked with 6 radial lines 60° apart. 7. ASTM A307 grade C has been replaced by ASTM F1554 grade 36.

bolts: metric standards Standards for metric bolts are promulgated by the ISO, but adopted by individual nations.

Dimensions A table of major diameters and pitches, up to 30 mm in diameter.

Thread classes of fit Please go here.

Property classes In metric bolts, strength is described by “property classes.” A property class designation consists of two numbers separated by a decimal point. There are nine commonly encountered: 4.6, 4.8, 5.8, 8.8, 9.8, 10.9 and 12.9. In the United States, property classes 8.8.3 and 10.9.3 also defined; the "3" after the second decimal point indicates the fastener is made of weathering steel. •

•

The number before the first decimal point is approximately one-hundredth of the nominal minimum tensile strength of the bolt in newtons per square millimeter (or megapascals, which is the same thing). The number after the first decimal point is approximately the ratio between the minimum yield stress and the minimum tensile strength, times ten.

markings Hex head bolts M5 and larger must have the property class marked on the head of the bolt, either in raised or depressed lettering. Fasteners smaller than M5, and those with slotted or recessed heads, whatever their diameter, need not be marked. Radial lines, such those used to mark SAE grades, are never used on metric bolts.

Proper ty Class

Fastener Sizes

Composition

Marki ng

4.6

M5-M100

4.6

4.8

M1.6-M16

4.8

5.8

M5-M24; lengths ≤ 150mm

8.8

M16-M72

cold worked

Q&T

5.8

8.8

A325M Type 1

A325M 8S

M16-M36

8.8 A325M Type 2

8.8 M16-M36

Q&T A325M 8S

M16-M36

weathering steel; Q&T

A325M 8S3

9.8

M1.6-M16

Q&T

9.8

9.8

M1.6-M16

Q&T

9.8

10.9

M5-M20

Q&T

10.9

10.9

M5-M100

Q&T

10.9

Q&T

A490M 10S

A325M Type 3

A490M Type 1

M12-M36

10.9

M5-M36

10.9 Q&T

A490M Type 2 A490M Type 3 12.9

A490M 10S

M12-M36

M12-M36

weathering steel; Q&T

A490M 10S3

M1.6-M100

Q&T

12.9

Key: Q&T= quenched and tempered;

correspondence with other grading systems

Approximately Equivalent Grades ISO class

Inch-based systems

4.6

SAE J429 grade 1 ASTM A 307, grade A

6.8

SAE grade 2

5.8

SAE J429, grade 2

6.8

SAE grade 2

8.8

SAE J429, grade 5 ASTM A 325, types 1 & 2 (M16 and larger) ASTM A 449

8.8.3

ASTM A325, type 3 (weathering steels)

9.8

9% stronger than SAE J429, grade 5 ASTM A 449

10.9

SAE J429, grade 8 ASTM A 354, grade BD

10.9. 3

ASTM A 490

12.9

ASTM A 574

ASTM International. Standard Specification for Carbon Steel Externally Threaded Metric Fasteners (Metric), F 568M - 07. ISO R898