ASTM A449 Bolts
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This ASTM A449 Bolts particular spreads extinguished and tempered, medium quality hex top screws, headed fasteners, poles and nuts from 1/4" to 3" in distance across. ASTM A449 Bolts items are produced from medium carbon or combination steel and are warm treated to acheive their required mechanical properties. ASTM A449 Bolts is fundamentally the same as ASTM A325 in science and quality yet covers a more extensive scope of measurements.
ASTM A449 Bolts Covers Specification for medium compound carbon Alloy Steel Hex Bolts,anchor bolts,threaded poles and so forth expected for general Engineering Apllication.Rimco Manufactures , Stocks and Supply these Bolt Fasteners in different sizes and Coatings.
This detail covers substance and mechanical necessities for two kinds of extinguished and tempered steel jolts and studs, expected for use by and large application with high quality prerequisite. ASTM A449 Bolts particular incorporates type 1 medium carbon steel jolts and studs made in breadth 1/4 inch to 3 inch for royal associations and from M6 to M76 for metric associations; Whereas A449 type 2 is low carbon martensite steel jolts and studs made in measurement 1/4 inch to 1 inch for magnificent associations and M6 to M24 for metric associations.
In the smaller diameters, A-449 has properties similar to A-105, and with some attention, the engineer will often approve a switch from A-449 to A-105. The properties are not identical, with A-449 having a tensile and yield slightly lower than A-105. However, as the diameter increases, the tensile and yield strengths of A-449 continue to decrease.
This specification2 covers extinguished and tempered steel hex top screws, fasteners, and studs having a base rigidity of 120 ksi for distances across 1.0 in. what's more, littler; 105 ksi for distances across over 1.0 in. to 11⁄2 in.; and 90 ksi for widths 13⁄4 in. to 3.0 in. comprehensive. The expression "latches" in this determination signifies hex top screws, fasteners, and studs.
ASTM A449 Bolts Scope
ASTM A449 Bolts covers headed bolts, rods, and anchor bolts in widths extending from 1/4″ through 3″ comprehensive. It is a medium quality jolt made from a medium carbon or amalgam steel that builds up its mechanical qualities through a warmth treating process. It is expected for general designing applications.
ASTM A449 Bolts is practically indistinguishable in science and quality to ASTM A325 and SAE J429 grade 5. Nonetheless, A449 is increasingly adaptable as in it covers a bigger measurement range and isn't confined by a particular configuration.
Like huge numbers of the ASTM guidelines A449 encapsulates distinctive sorts. Type 1, Type 2, and Type 3 A449 are assigned by remarkable markings on the head and in this occurrence allude to different materials utilized in each. Explicitly the callouts designate:
- Type 1 - Plain carbon steel, composite steel, carbon boron steel, or amalgam boron steel.
- Type 2 – Withdrawn in 2003
- Type 3 – Weathering steel
A449 Types
| TYPE 1 | Plain carbon steel, carbon boron steel, alloy steel, or alloy boron steel. |
|---|---|
| TYPE 2 | Withdrawn 2003 |
| TYPE 3 | Weathering steel. |
Chemical Composition
| Type 1 Bolts | ||||
|---|---|---|---|---|
| Element | Carbon Steel | Carbon Boron Steel | Alloy Steel | Alloy Boron Steel |
| Carbon | 0.30 - 0.52% | 0.30 - 0.52% | 0.30 - 0.52% | 0.30 - 0.52% |
| Manganese, min | 0.60% | 0.60% | 0.60% | 0.60% |
| Phosphorus, max | 0.040% | 0.040% | 0.035% | 0.035% |
| Sulfur, max | 0.050% | 0.050% | 0.040% | 0.040% |
| Silicon | 0.15-0.30% | 0.10 - 0.30% | 0.15 - 0.35% | 0.15 - 0.35% |
| Boron | 0.0005 - 0.003% | 0.0005 - 0.003% | ||
| Alloying Elements | * | * | ||
| Type 3 Bolts | ||||||
|---|---|---|---|---|---|---|
| Element | A | B | C | D | E | F |
| Carbon | 0.33 - 0.40% | 0.38 - 0.48% | 0.15 - 0.25% | 0.15 - 0.25% | 0.20 - 0.25% | 0.20 - 0.25% |
| Manganese | 0.90 - 1.20% | 0.70 - 0.90% | 0.80 - 1.35% | 0.40 - 1.20% | 0.60 - 1.00% | 0.90 - 1.20% |
| Phosphorus | 0.035% max | 0.06 - 0.12% | 0.035% max | 0.035% max | 0.035% | 0.035% |
| Sulfur, max | 0.040% | 0.040% | 0.040% | 0.040% | 0.040% | 0.040% |
| Silicon | 0.15 - 0.35% | 0.30 - 0.50% | 0.15 - 0.35% | 0.25 - 0.50% | 0.15 - 0.35% | 0.15 - 0.35% |
| Copper | 0.25 - 0.45% | 0.20 - 0.40% | 0.20 - 0.50% | 0.30 - 0.50% | 0.30 - 0.60% | 0.20 - 0.40% |
| Nickel | 0.25 - 0.45% | 0.50 - 0.80% | 0.25 - 0.50% | 0.50 - 0.80% | 0.30 - 0.60% | 0.20 - 0.40% |
| Chromium | 0.45 - 0.65% | 0.50 - 0.75% | 0.30 - 0.50% | 0.50 - 1.00% | 0.60 - 0.90% | 0.45 - 0.65% |
| Vanadium | 0.020% min | |||||
| Molybdenum | 0.06% max | 0.10% max | ||||
| Titanium | 0.05% max | |||||
Mechanical Properties
| Size | Tensile, ksi | Yield, ksi | Elong. %, min | RA %, min |
|---|---|---|---|---|
| 1⁄4 - 1 | 120 min | 92 min | 14 | 35 |
| 11⁄8 - 11⁄2 | 105 min | 81 min | 14 | 35 |
| 15⁄8 - 3 | 90 min | 58 min | 14 | 35 |
Hardness Requirements
| Bolt Size, inch | Hardness | |
|---|---|---|
| Brinell Hardness Number | Rockwell C | |
| 1/4 to 1, incl. | 255 to 321 | 25 to 34 |
| Over 1 to 1-1/2, incl. | 223 to 285 | 19 to 30 |
| Over 1-1/2" to 3, incl. | 183 to 235 | -- |
ASTM A449 Bolts Industrial Applications
- ASTM A449 Bolts uses in Aircraft Exhaust Manifolds
- ASTM A449 Bolts uses in Off-Shore Oil Drilling Companies
- ASTM A449 Bolts uses in Power Generation
- ASTM A449 Bolts uses in Petrochemicals
- ASTM A449 Bolts uses in Gas Processing
- ASTM A449 Bolts uses in Specialty Chemicals
- ASTM A449 Bolts uses in Pharmaceuticals
- ASTM A449 Bolts uses in Pharmaceutical Equipment
- ASTM A449 Bolts uses in Spiral Welded tube for burner pipes and flues
- ASTM A449 Bolts uses in Sea Water Equipment
- ASTM A449 Bolts uses in Heat Exchangers
ASTM A449 Bolts Torque Chart
| Bolt Size | TPI | Proof Load (lbs) | Clamp Load (lbs) | Tightening Torque (ft lbs) | ||
|---|---|---|---|---|---|---|
| Galv+Waxed | Galv | Plain | ||||
| 1⁄4 | 20 | 2,700 | 2,025 | 4 | 11 | 8 |
| 5⁄16 | 18 | 4,450 | 3,338 | 9 | 22 | 17 |
| 3⁄8 | 16 | 6,600 | 4,950 | 15 | 39 | 31 |
| 7⁄16 | 14 | 9,050 | 6,788 | 25 | 62 | 49 |
| 1⁄2 | 13 | 12,050 | 9,038 | 38 | 94 | 75 |
| 9⁄16 | 12 | 15,450 | 11,588 | 54 | 136 | 109 |
| 5⁄8 | 11 | 19,200 | 14,400 | 75 | 188 | 150 |
| 3⁄4 | 10 | 28,400 | 21,300 | 133 | 333 | 266 |
| 7⁄8 | 9 | 39,250 | 29,438 | 215 | 537 | 429 |
| 1 | 8 | 51,500 | 38,625 | 322 | 805 | 644 |
| 11⁄8 | 7 | 56,450 | 42,338 | 397 | 992 | 794 |
| 11⁄4 | 7 | 71,700 | 53,775 | 560 | 1,400 | 1,120 |
| 13⁄8 | 6 | 85,450 | 64,088 | 734 | 1,836 | 1,469 |
| 11⁄2 | 6 | 104,000 | 78,000 | 975 | 2,438 | 1,950 |
| 13⁄4 | 5 | 104,500 | 78,375 | 1,143 | 2,857 | 2,286 |
| 2 | 41⁄2 | 137,500 | 103,125 | 1,719 | 4,297 | 3,438 |
| 21⁄4 | 41⁄2 | 178,750 | 134,063 | 2,514 | 6,284 | 5,027 |
| 21⁄2 | 4 | 220,000 | 165,000 | 3,438 | 8,594 | 6,875 |
| 23⁄4 | 4 | 271,150 | 203,363 | 4,660 | 11,651 | 9,321 |
| 3 | 4 | 328,350 | 246,263 | 6,157 | 15,391 | 12,313 |
| * SAE J429 grade 5 bolts do not exceed 1-1/2" diameter. | ||||||
ASTM Standards Of ASTM A449 Bolts
| TYPE 1 | Plain carbon steel, carbon boron steel, alloy steel, or alloy boron steel. |
|---|---|
| TYPE 2 | Withdrawn 2003 |
| TYPE 3 | Weathering steel. |
ASTM Standards Of ASTM A449 Bolts
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COATINGS
