ASTM A320 L7 Stud bolt & A194 Gr.7 Heavy Hex Nuts,xylan coated stud bolts
ASTM A320 L7 stud bolts with ASTM A194 Grade 7 heavy hex nuts are high-strength alloy steel fasteners designed for low-temperature service. When combined with Xylan coating, these fasteners provide enhanced corrosion resistance, reduced friction, and extended service life in offshore, LNG, and harsh industrial environments.
What is ASTM A320 L7 Stud Bolt?
ASTM A320 L7 is a low-temperature alloy steel fastener manufactured from quenched and tempered chromium-molybdenum steel.
C&N supply high quality of ESPARRAGOS STUD BOLT A320 Grado L7 w/2 A194 7 NUTS in China ,STUD BOLT A320 Grado L7M w/2 A194 7M NUTS ，PTFE coated ASTM A320 L7 Stud bolt & Heavy Hex Nuts A194 Grade 4/7,Xylan 1070/xylan 1424 coated ASTM A320 Grade L7 Stud bolt & Heavy Hex Nuts
ASTM A320 L7 Stud Bolts are specially designed for LOW temperature performance. These fasteners are commonly used for valves, flanges, fittings, and pressure vessels . ASTM specifications recommend a minimum Charpy impact value for ASTM A320 L7 Stud Bolts to be 20-ft-lbf @ -150F.
(A) Studs
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I. Strength Grades
| DIN 931/933 | Grade 4.6, 4.8, 5.6, 5.8, 8.8, 10.9, 12.9 |
| DIN 931/933 | SUS 304, 316 |
| ASTM A307 | Grade A & B |
| ASTM A320, A320M | Grade L7, L7M, B8, B8M |
| ASTM A325, A325M | Grade 8.8 |
| ASTM A490, A490M | Grade 10.9 |
| ASTM A193/A193M | Grade B7, B7M, B8, B8M, B16 |
ASTM A320 Grade L7 Stud bolts with two ASTM A194 Gr 7 nuts
ASTM A320 Grade L7M Stud bolts with two ASTM A194 Gr 7M nuts
ASTM A320 / A320M
Standard Specification for Alloy-Steel and Stainless Steel Bolting for Low-Temperature Service
ASTM Standards
A194/A194M Specification for Carbon Steel, Alloy Steel, and Stainless Steel Nuts for Bolts for High Pressure or High Temperature Service, or Both
F436/F436M Specification for Hardened Steel Washers Inch and Metric Dimensions
F606/F606MTest Methods for Determining the Mechanical Properties of Externally and Internally Threaded Fasteners, Washers, Direct Tension Indicators, and Rivets
IV. Surface Treatments
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- Plating
- Zinc (White / Yellow / Black)
- Cadmium (White / Yellow / Black)
- Zinc Nickel
- Plating
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- Galvanising
- Hot-Dipped Galvanise
- Mechanical Galvanise
- Galvanising
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- Fluorocarbon Coating
Xylan® / Dupont Coating Systems:- Xylar 2
- Xylan 1070
- Xylan 1424
- Fluorocarbon Coating
- Customised Coating Systems
- Zinc + Fluorocarbon / PTFE coated stud bolt
- Cadmium + Fluorocarbon /PTFE coated stud bolt
- Zinc Nickel + Fluorocarbon /PTFE coated stud bolt
- Zinc Plating + Xylan 1424 Blue PTFE coated stud bolt
- Xylar 2 + Xylan 1070 coated stud bolt
Material Chemical Composition
| Chemical Requirement AISI 4140 4142 4145 |
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HOW to order our A320 L7 STUD BOLT,ASTM A194 Gr 7 HEX NUTS?
EXAMPLE#1,
1-5/8″-370mm STUD BOLT&NUTS, A320/A320M-L7M, FULL-THREAD, 8-UN, ASME B18.2.1/B1.1 CL.2A/ A194/A194M-7M, WITH TWO HEAVY HEX. NUTS, ASME B18.2.2/B1.1 CL.2B, ZINC BASE COAT, FLUOROPOLYMER COATING, C/W TWO METALLIC WASHERS FLAT TYPE
1-1/8″-200mm STUD BOLT&NUTS-CONT, A320/A320M-L7, FULL-THREAD, 8-UN, ASME B18.2.1/B1.1 CL.2A/ A194/A194-7 WITH TWO HEAVY HEX. NUTS, ASME B18.2.2/B1.1 CL.2B,
