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Address: Room 1703, 17th Floor, Building 5, Jinyin Modern City, Guangdian South Road, Jinshui District, Zhengzhou City, Henan Province, China.
Contact name:Vicky
Zhengzhou Huitong Pipeline Equipment Co.,Ltd. |
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ASTM A193 B7 Alloy Steel Hex Bolt Full Threaded Rod Stud Bolt
1. ASTM A193 B7 Alloy Steel Hex Bolt Full Threaded Rod Stud Bolt Specification
| Material: | Alloy Steel |
| Standard : | ASTM A193 / A194 , ASME SA193 / SA194 |
| Grade: | B 6, B 7/ B 7M, B 16, 2, 2HM, 2H, GR 6, B 7, B 7M |
| Type of Fasteners: | Bolts : Bolts stud bolts, hex head bolts, socket hexagon head screw anchor bolts, u-bolts, J bolts, mushroom head square neck bolts, t- head bolts, wing screw, eye bolt, eye bolt, foundation bolts and structural bolts Washer : Plain washer , plain big & small OD washer , spring lock washer , spring washer heavy duty , tooth washer , star washer , tab washer with one & two tab Nuts : Hexagon nuts, hexagon coupling nuts, hexagon thin nut, square nut, hexagon castle nuts, self locking nut, hexagon domed cap nuts Screw : Pan head slotted screws, cheese head slotted screws, countersunk head slotted screws, countersunk raised head slotted screws, pan phillipse head screw, countersunk Phillipse raised head screws, slotted cheese trim head machine screws, socket head allen cap screws, allen countersunk socket head cap screws, socket head shoulder screws, socket head cap screw low head, hexagon socket set screw with flat point, hexagon socket set screws with cone point, hexagon socket set screw with dog point, hexagon socket set screws with dog point, hexagon socket set screws with cup point, imprial socket cap screws. Other : Threaded rod, as per drawing and customers spec. coating, hot dipped galvanizing, phosphate, Teflon, xylon, zinc, cadmium. |
| In Form of: | Hex, Square, Round , Threading as per Gauge Etc. |
2. Alloy Steel Fasteners Surface Treatments
.Hot Dipped Galvanized Fasteners
.Phosphate Coated Fasteners
.Teflon Coated Fasteners
.Xylon Coated Fasteners
.Zinc Coated Fasteners
.Cadmium Coated Fasteners
.Electro Zinc plated Fasteners
.Electro Cadmium Plated Fasteners
.Ceramic Filled PTFE Coated Fasteners
.Electroless Nickel Plated Fasteners
.Zinc Nickel Coated Fasteners
.Aluminium Coated Fasteners
.Silver Coated Fasteners
.Zinc/Nickel by Electrodeposition Fasteners
.Dacromet Fasteners
.Geomet Fasteners
3. Recommended Nuts,Bolts & Washer
| Bolt Grade | Nuts | Washers |
| B7 | A194 Grade 2H | F436 |
| B8 Class 1 | A194 Grade 8 | SS304 |
| B8M Class 1 | A194 Grade 8M | SS316 |
| B8 Class 2 | A194 Grade 8 | SS304 |
| B8M Class 2 | A194 Grade 8M | SS316 |
4. Material Chemical Composition
| Element | B7 (AISI 4140) | B8 (AISI 304) | B8M (AISI 316) |
| Carbon | 0.37 – 0.49% | 0.08% max | 0.08% max |
| Manganese | 0.65 – 1.10% | 2.00% max | 2.00% max |
| Phosphorus, max | 0.035% | 0.045% | 0.045% |
| Sulfur, max | 0.040% | 0.030% | 0.030% |
| Silicon | 0.15 – 0.35% | 1.00% max | 1.00% max |
| Chromium | 0.75 – 1.20% | 18.0 – 20.0% | 16.0 – 18.0% |
| Nickel | 8.0 – 11.0% | 10.0 – 14.0% | |
| Molybdenum | 0.15 – 0.25% | 2.00 – 3.00% |
5. A193 Grades
| B7 | Alloy steel, AISI 4140/4142 quenched and tempered |
| B8 | Class 1 Stainless steel, AISI 304, carbide solution treated. |
| B8M | Class 1 Stainless steel, AISI 316, carbide solution treated. |
| B8 | Class 2 Stainless steel, AISI 304, carbide solution treated, strain hardened |
| B8M | Class 2 Stainless steel, AISI 316, carbide solution treated, strain hardened |
6. Heat Treatment
Quenched & Tempered at 593º C minimum.
Recommended Nuts & Washers
| Bolting Grade | Nut Grade | Washer Grade |
| ASTM A193 Grade B7 | ASTM A194 Grade 2H, 2HM | ASTM F436 |
7. Alloy steel b7 bolts Application
A193 Grade B7 Bolts uses in Petrochemicals
SS A193 Hex Nuts uses in Heat Exchangers
ASME SA193 B7 Nuts uses in Power Generation
A193 B7 Bolts uses in Pharmaceutical Equipment
A193 B7 Heavy Hex Bolts uses in Gas Processing
ASTM A193 B7 Bolts uses in Aircraft Exhaust Manifolds
ASTM A193 Bolts uses in Spiral Welded tube for burner pipes and flues
ASTM A193 B7 Fasteners uses in Pharmaceuticals
SA193 B7 Stud Bolts uses in Specialty Chemicals
SA193 B7 Studs uses in Off-Shore Oil Drilling Companies
A193 B7 Bolts uses in Sea Water Equipment
