SA 320 Grade L7 studs and L7 threaded rod manufacturer in India
Hilton steel is a leading A320 L7 double end stud bolts supplier in Mumbai. view the inspection method & sizes as per ASME B18.31.2
ASTM A320 L7 Stud Bolts
SA 320 Grade L7 studs
L7 threaded rod
Stud Bolt ASTM A320 L7 and SA320 L7 fully threaded studs used in high-temperature and high-pressure applications
Table of Content
ASTM A320 L7 stud bolts specifications
| Hardness | Size | Length | Specifications |
|---|---|---|---|
| 27 HRC | M1.4 – M36 | 20mm – 100mm | ASTM A193 / ASME SA193 |
| International Standard | Diameter | Thread | Application |
| BS, UNI, ANSI, ISO, IS, JIS, GB, ASME, ASTM DIN | upto 2-1/2″ | BSW, METRIC, UNF, UNC, BSF, custom |
|
| Head Drive | Temperature range | Iso Standard | Coating |
| Phillips/Slot, Phillips, Slotted, Six-Lobe | up to 450°C (840°F) | ISO 4033, ISO 4032 | PTFE, zinc plated, black phosphate, hot dip galvanized |
Check chemical and mechanical properties of A320 Gr L7 tap end stud bolts as per DIN 912, DIN 7984, DIN 6912 & DIN 10642
ASTM A320 L7 stud bolts types
A320 L7 Double End Stud Bolts
- Length: 20mm – 100mm
- Temperature range: up to 450°C (840°F)
- Hardness : 27 HRC
- Thread types: Metric, Metric Fine, BSW, BSF, UNC, UNF and BA
Stud Bolt ASTM A320 L7
- Tensile strength: 125ksi
- Applications: Petrochemical, Power Generation, Oil and Gas
- Diameter: upto 2-1/2″
SA320 L7 Fully Threaded Studs
- Yield strength: 105 ksi
- Sizes: M1.4 – M36
- Coatings: PTFE, black phosphate, zinc plated, hot dip galvanized
We can supply SA 320 Gr L7 threaded bar and ASTM A320 L7 continuous threaded stud bolts in thickness from 6.35 mm
SA320 L7 fully threaded studs chemical composition
| Elements | Allowable Variation, Under or over, % | Content, % |
|---|---|---|
| Manganese | 0.04 | 2.00 maximum |
| Carbon | 0.01 over | 0.08 maximum |
| Sulfur | 0.005 over | 0.03 maximum |
| Phosphorus | 0.005 over | 0.04 maximum |
| Chromium | 0.20 | 13.50 – 16.00 |
| Silicon | 0.05 | 1.00 maximum |
| Nickel | 0.20 | 24.00 – 27.00 |
| Molybdenum | 0.05 | 1.00 – 1.50 |
| Aluminimumum | 0.05 over | 0.35 maximum |
| Titanium | 0.05 | 1.90 – 2.35 |
| Boron | 0.0004 under to 0.001 over | 0.001 – 0.010 |
| Vanadium | 0.03 | 0.10 – 0.50 |
Mechanical properties of A320 GR L7 tap end stud bolts
| Tensile Class | Elongation in 4D minimum, % | Yield strength, 0.2% offset, minimum | Tensile Strength, minimum | Reduction of Area, minimum, % | ||
|---|---|---|---|---|---|---|
| ksi | MPa | ksi | MPa | |||
| D | 15 | 105 | 725 | 130 | 895 | 18 |
| A, B and C | 15 | 85 | 585 | 130 | 895 | 18 |
SA 320 GR L7 threaded bar hardness
| Tensile Class | Brinell Hardness No | Approximate Rockwell Hardness B & C | |
|---|---|---|---|
| minimum | maximum | ||
| D | 248 – 321 | 24 HRC | 35 HRC |
| A, B and C | 248 – 341 | 24 HRC | 27 HRC |
L7 stud bolts stress rupture requirements
| Tensile Class | Elongation, minimum, % | Test Temperature °F [°C] | Stress, minimum | Time to Rupture, minimum, h [Note] | |
|---|---|---|---|---|---|
| ksi | Mpa | ||||
| D | 5 | 1200 [650] | 40 | 275 | 100 |
| A, B and C | 5 | 1200 [650] | 56 | 385 | 100 |