Asme Sa320 bolts and L7m Nuts Manufacturer and supppliers in india
ASTM A320 Bolts are made under the specification covering alloy steel and stainless steel materials and are intended for use under low temperature services. It covers forged, rolled and strain hardened fasteners. Viha Steel & Forging is a leading manufacturer and supplier of the different types of ASTM A320 L7 Bolts. The specification A320 covers L7, L43, B8, B8M and class 1 and class 2. These are also quenched and tempered, carbide solution treated and strain hardened. The sizes range from ¾ inches to 2 ½ inches.
The astm a320 stud bolts have different tensile and yield strengths. The minimum tensile strength ranges from 75ksi to 125ksi depending on the different grades within the A320 specification. The a320 bolts and nuts also have minimum yield strengths range from 30ksi to 105ksi with elongation rates ranging from 12% to 30%. The material composition of the different grades varies with carbon, manganese, phosphorus, sulfur, silicon, chromium, nickel and molybdenum. The astm a320 l7m stud bolts have chromium ranges up to 18% and nickel ranges up to 14% with molybdenum ranges up to 3%. These material compositions make the A320 fasteners corrosion resistant, strong and ductile.
The applications of the ASTM A320 Stainless Steel Bolts are used in a number of applications. The power generation plants, food processing plants, oil and gas industrial applications, petroleum, marine, chemical, petrochemical, pharmaceutical and heat exchanger, boiler and condenser applications. As a leading manufacturer and supplier, we supply the ASTM A320 L7 Stud Bolts and other fasteners in various sizes. Please feel free to contact us for more information and pricing of the A320 specification fasteners.
Dimensions Standard And Specification Of ASTM A320 Bolts
Standards |
Designation |
|---|---|
| ASTM | A320 : Grade L7M, L7, B8, B8M |
| Manufacturing Process | Cold Heading, Wire Drawing, Heat Treatment, Insert tapping, Inspection, Surface Plating, Packing |
| Thread Requirements of | UNC & UNF, ASME B1.1, Class 2A (Fastenal will inspect and accept parts with a 1A no-go gauge) |
| Delivery time | custom product will according to special requirement, Regular product is about 7-15 days |
| Head | Square, Hex, Hex flange, Round, T-head, Flat & Triangular etc |
| Bolts Coatings | Cadmium, Black Oxide, Teflon, Galvanized, Zinc, Xylan, Others Upon Request |
| Bolts Neck type | Square, Hex, Oval, Triangular & Knurled etc |
Melt Origin |
South America/East Europe/Japan/Korea |
Dimensions |
ASME B18.3, B18.2.1 |
Product Origin |
Made in India |
Certification |
Dual Certified As per ASME & ASTM Codes |
Threads Configuration |
B1.13M 6h Metric Coarse Threads and ASME B1.1 2A/3A Inch Unified Threads |
Mandatory Requirements |
Free from Radioactive & Mercury Contamination |
Additional Certifications |
Merkblatt AD 2000 W2 Certified, PED 97/23/EC Certified |
Additional Requirements |
NACE MR0175 / MR0103 /ISO 15156 Compliance |
| Samples | Yes |
| Payment Terms | Western Union, T/T, Paypal, Trade Assurance 30% deposit & balance before shipping or L/C |
a320 bolts and nuts
Grades
| L7 Alloy steel | AISI 4140/4142 Quenched and tempered |
|---|---|
| L43 Alloy steel | AISI 4340 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 |
Buy ASTM A320 Stainless Steel Bolts at the lowest cost, Check online astm a320 l7m stud bolts Price List and grades
ASTM A320 L7 Bolts Price List
ASTM A320 Bolts |
Price |
alloy steel types astm a320 l7/a193 b7 stud bolts |
US$ 1.35-US$ 1.45 / Piece |
astm a320 grade L7 bolts |
US$ 0.15-US$ 6.59 / Set |
astm a320 l7m stud bolt |
US$ 0.01-US$ 1.00 / Piece |
Mechanical Properties Database Of astm a320 stud bolts
| Grade | Diameter | Tensile, ksi, min | Yield, ksi, min | Charpy Impact 20-ft-lbf @ temp | Elong, %, min | RA, %, min |
|---|---|---|---|---|---|---|
| L7 | Up to 21⁄2 | 125 | 105 | -150° F | 16 | 50 |
| L43 | Up to 4 | 125 | 105 | -150° F | 16 | 50 |
| Class 1: BC, B8C, B8M, B8P, B8F, B8T, B8LN, B8MLN | All | 75 | 30 | N/A | 30 | 50 |
| Class 1A: B8A, B8CA, B8MA, B8PA, B8FA, B8TA, B8LNA, B8MLNA | All | 75 | 30 | N/A | 30 | 50 |
| Class 2: B8, B8C, B8P, B8F, B8T | Up to 3⁄4 | 125 | 100 | N/A | 12 | 35 |
| 7⁄8 - 1 | 115 | 80 | N/A | 15 | 35 | |
| 11⁄8 - 11⁄4 | 105 | 65 | N/A | 20 | 35 | |
| 13⁄8 - 11⁄2 | 100 | 50 | N/A | 28 | 45 | |
| Class 2: B8M | Up to 3⁄4 | 110 | 95 | N/A | 15 | 45 |
| 7⁄8 - 1 | 100 | 80 | N/A | 20 | 45 | |
| 11⁄8 - 11⁄4 | 95 | 65 | N/A | 25 | 45 | |
| 13⁄8 - 11⁄2 | 90 | 50 | N/A | 30 | 45 |
Chemical Element Of astm a320 l7m stud bolts
| Element | L7 (AISI 4140) | L43 (AISI 4340) | B8 (AISI 304) | B8M (AISI 316) |
|---|---|---|---|---|
| Carbon | 0.38 - 0.48% | 0.38 - 0.43% | 0.08% max | 0.08% max |
| Manganese | 0.75 - 1.00% | 0.75 - 1.00% | 2.00% max | 2.00% max |
| Phosphorus, max | 0.035% | 0.035% | 0.045% | 0.045% |
| Sulfur, max | 0.040% | 0.040% | 0.030% | 0.030% |
| Silicon | 0.15 - 0.35% | 0.15 - 0.35% | 1.00% max | 1.00% max |
| Chromium | 0.80 - 1.10% | 0.70 - 0.90% | 18.0 - 20.0% | 16.0 - 18.0% |
| Nickel | 1.65 - 2.00% | 8.0 - 11.0% | 10.0 - 14.0% | |
| Molybdenum | 0.15 - 0.25% | 0.20 - 0.30% | 2.00 - 3.00% |
ASTM A193 B7 vs A320 L7 Stud Bolts
| Grade | Size | Tensile ksi, min | Yield, ksi, min | Elong, %, min | RA % min |
| B7 | Up to 2-1/2 | 125 | 105 | 16 | 50 |
| L7 | Up to 2-1/2 | 125 | 105 | 16 | 50 |
ASTM A320 Impact Test Requirements
| Grade | Test Temperature | |
|---|---|---|
| °F | °C | |
| L7M, L70, L71, L72, L73 | -100 | -73 |
| L7, L7A, L7B, L7C | -150 | -101 |
| L43 | -150 | -101 |
| L1 | -100 | -73 |
A320 Recommended Hardware
| Grade | Nuts | Washers |
|---|---|---|
| L7 | A194 Grade 4 or 7 | F436 |
| L43 | A194 Grade 4 or 7 | 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 |
| Strain hardened nuts available as a supplementary requirement | ||
Torque Chart Of ASTM A320 Stainless Steel Bolts
BOLT DIA |
Torque FT-LBS |
||
30% Initial Torque |
70% Torque |
100% Final Torque |
|
1/2 |
16 |
36 |
52 |
9/16 |
23 |
53 |
75 |
5/8 |
31 |
73 |
104 |
3/4 |
55 |
129 |
184 |
7/8 |
71 |
166 |
237 |
1 |
107 |
249 |
356 |
1.1/8 |
127 |
297 |
424 |
1.1/4 |
179 |
417 |
596 |
1.3/8 |
186 |
435 |
622 |
1.1/2 |
246 |
574 |
821 |
1.9/16 |
168 |
392 |
560 |
1.5/8 |
191 |
445 |
636 |
1.3/4 |
240 |
561 |
801 |
1.7/8 |
298 |
696 |
994 |
2 |
366 |
853 |
1219 |
2.1/4 |
529 |
1234 |
1762 |
2.1/2 |
733 |
1709 |
2442 |
2.3/4 |
986 |
2300 |
3285 |
3 |
1289 |
3008 |
4297 |
Size Chart ASTM A320 Grade L7 Studs
A320 Heavy Hex Bolts Dimensions
Diameter (D) |
Body Diameter (D) |
Across the Flats (F) |
Across the Corners © |
Head Height (H) |
Thread Lengths (T) |
|||||
|---|---|---|---|---|---|---|---|---|---|---|
MAX |
MIN |
MAX |
MIN |
MAX |
MIN |
MAX |
MIN |
< 6” |
> 6” |
|
1/2 |
0.515 |
0.482 |
0.875 |
0.85 |
1.01 |
0.969 |
0.364 |
0.302 |
1.25 |
1.5 |
5/8 |
0.642 |
0.605 |
1.062 |
1.031 |
1.227 |
1.175 |
0.444 |
0.378 |
1.5 |
1.75 |
3/4 |
0.768 |
0.729 |
1.25 |
1.212 |
1.443 |
1.383 |
0.524 |
0.455 |
1.75 |
2 |
7/8 |
0.895 |
0.852 |
1.438 |
1.394 |
1.66 |
1.589 |
0.604 |
0.531 |
2 |
2.25 |
1 |
1.022 |
0.976 |
1.625 |
1.575 |
1.876 |
1.796 |
0.7 |
0.591 |
2.25 |
2.5 |
1 1/8 |
1.149 |
1.098 |
1.812 |
1.756 |
2.093 |
2.002 |
0.78 |
0.658 |
2.5 |
2.75 |
1 1/4 |
1.277 |
1.223 |
2 |
1.938 |
2.309 |
2.209 |
0.876 |
0.749 |
2.75 |
3 |
1 3/8 |
1.404 |
1.345 |
2.188 |
2.119 |
2.526 |
2.416 |
0.94 |
0.81 |
3 |
3.25 |
1 1/2 |
1.531 |
1.47 |
2.375 |
2.3 |
2.742 |
2.622 |
1.036 |
0.902 |
3.25 |
3.5 |
1 3/4 |
1.785 |
1.716 |
2.75 |
2.662 |
3.175 |
3.035 |
1.196 |
1.054 |
3.75 |
4 |
2 |
2.039 |
1.964 |
3.125 |
3.025 |
3.608 |
3.449 |
1.388 |
1.175 |
4.25 |
4.5 |
2 1/4 |
2.305 |
2.214 |
3.5 |
3.388 |
4.041 |
3.862 |
1.548 |
1.327 |
4.75 |
5 |
2 1/2 |
2.559 |
2.461 |
3.875 |
3.75 |
4.474 |
4.275 |
1.708 |
1.479 |
5.25 |
5.5 |
2 3/4 |
2.827 |
2.711 |
4.25 |
4.112 |
4.907 |
4.688 |
1.869 |
1.632 |
5.75 |
6 |
3 |
3.081 |
2.961 |
4.625 |
4.475 |
5.34 |
5.102 |
2.06 |
1.815 |
6.25 |
6. |
largest ASTM A320 Grade L7 Studs stockist in India, we offer Grade L7 Nuts in almost all sizes
For Impact Testing ASTM A320 Temperature Requirement
| Size of specimen, mm | Minimum Impact Value Required for Average of Each Set of Three Specimens, ft.lbf(J) | Minimum Impact Value permitted for One Specimen Only of a Set, ft.lbf(J) |
|---|---|---|
| All Grade Except L1A | ||
| 10 by 10 | 20 [27] | 15 [20] |
| 10 by 7.5 | 16 [22] | 12 [16] |
| Grade L1 | ||
| 10 by 10 | 40 [54] | 30 [41] |
| 10 by 7.5 | 32 [44] | 24 [32] |
Dimension schedule of ASTM A320 Grade L7m Bolts
**All measurements in millimeters**
NOMINAL SIZE (D) |
BODY DIAMETER |
HEAD THICKNEASTM A193 |
ACROASTM A193 THE FLATS |
ACROASTM A193 CORNERS |
||||
|---|---|---|---|---|---|---|---|---|
D (MAX) |
D (MIN) |
H (MAX) |
H (MIN) |
F (MAX) |
F (MIN) |
C (MAX) |
C (MIN) |
|
m10 |
10.00 |
9.78 |
6.63 |
6.17 |
17.00 |
15.73 |
18.48 |
17.77 |
m12 |
12.00 |
11.73 |
7.76 |
4.24 |
19.00 |
17.73 |
20.78 |
20.03 |
m14 |
14.00 |
13.73 |
9.09 |
8.51 |
22.00 |
20.67 |
24.25 |
23.35 |
m16 |
16.00 |
15.73 |
10.32 |
9.68 |
24.00 |
23.67 |
27.71 |
26.75 |
m20 |
20.00 |
19.67 |
12.88 |
12.12 |
30.00 |
29.16 |
34.64 |
32.95 |
m24 |
24.00 |
23.67 |
15.44 |
14.56 |
36.00 |
35.00 |
41.57 |
39.55 |
m30 |
30.00 |
29.67 |
19.48 |
17.92 |
46.00 |
45.00 |
53.12 |
50.85 |
m36 |
36.00 |
35.61 |
23.38 |
21.63 |
55.00 |
53.80 |
63.51 |
60.79 |
m42 |
42.00 |
41.38 |
26.97 |
25.03 |
65.00 |
62.90 |
75.06 |
71.71 |
m48 |
48.00 |
47.38 |
31.07 |
28.93 |
75.00 |
72.60 |
86.60 |
82.76 |
m56 |
56.00 |
55.26 |
36.2 |
33.80 |
85.00 |
82.20 |
98.15 |
93.71 |
m64 |
64.00 |
63.26 |
41.32 |
38.68 |
95.00 |
91.80 |
109.70 |
104.65 |
m72 |
72.00 |
71.26 |
46.45 |
43.55 |
105.00 |
101.40 |
121.24 |
115.60 |
m80 |
80.00 |
79.26 |
51.58 |
48.42 |
115.00 |
111.00 |
132.72 |
126.54 |
m90 |
90.00 |
89.13 |
57.74 |
54.26 |
130.00 |
125.50 |
150.11 |
143.07 |
m100 |
90.00 |
99.13 |
63.9 |
60.10 |
145.00 |
140.00 |
167.43 |
159.60 |
We Keep Bulk Stock of ASTM A320 Grade L7m Material at our stockyard, contact us for Free Sample & stock list
Bulk Stock Of ASTM A320 Grade L7 Stud Bolts
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find ASTM A320 Gr L7 Stud Bolt Specification and dimensions chart here