Phone Numbers -
Email ID -
Physical Address -
Shop No- 6B, Ground Floor, Sindhi Ln, opposite Municipal School, Charni Road East, Cawasji Patel Tank, Girgaon, Mumbai, Maharashtra 400004
Email ID -
Physical Address -
Shop No- 6B, Ground Floor, Sindhi Ln, opposite Municipal School, Charni Road East, Cawasji Patel Tank, Girgaon, Mumbai, Maharashtra 400004
Home » Fasteners » Stainless Steel » Stainless Steel B8M Bolts
Neelkamal Alloys LLP is a prominent manufacturer and supplier, offering a variety of Stainless Steel B8M Class 1 and Class 2 bolts in different sizes and configurations. These fasteners are made from 316 stainless steel, which is strengthened by its chromium, nickel, and molybdenum composition. These bolts are designed for medium to high-temperature applications. With tensile strengths ranging from 75ksi to 110ksi, depending on class and size, ASTM A193 B8M fasteners are highly durable. Available in sizes from 7/8 inches to 1 ½ inches, they also offer yield strengths between 30ksi and 95ksi. SS B8M bolts come in two classes: Class 1, which undergoes carbide solution treatment, and Class 2, which is further strain-hardened after the solution treatment. Both classes, especially Class 1, exhibit exceptional strength and can endure high-temperature environments effectively.
Melt Origin |
South America/East Europe/JapanKorea/ |
---|---|
Bolts Dimensions |
ASME B18.2.1, B18.3 |
Bolts Threads Configuration |
ASME B1.1 2A/3A Inch Unified Threads and B1.13M 6h Metric Coarse Threads |
Additional Requirements |
NACE MR0103 / MR0175 / ISO 15156 Compliance |
Additional Certifications |
PED 97/23/EC Certified, Merkblatt AD 2000 W2 Certified |
Product Origin |
Made in India |
Bolts Certification |
Dual Certified As per ASTM & ASME Codes |
Mandatory Requirements |
Free from Mercury & Radioactive Contamination |
Bolts Standards |
Designation |
---|---|
ASTM |
A193 B8M: Class 1 Stainless Steel, AISI 316 |
BOLTS DIA |
Bolts 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 |
BOLTS DIA |
Bolts Torque Nm |
||
30% Initial Torque |
70% Torque |
100% Final Torque |
|
1/2 |
22 |
49 |
71 |
9/16 |
31 |
72 |
102 |
5/8 |
42 |
99 |
141 |
3/4 |
75 |
175 |
249 |
7/8 |
96 |
225 |
321 |
1 |
145 |
338 |
483 |
1.1/8 |
172 |
403 |
575 |
1.1/4 |
243 |
565 |
808 |
1.3/8 |
252 |
590 |
843 |
1.1/2 |
334 |
778 |
1113 |
1.9/16 |
228 |
531 |
759 |
1.5/8 |
259 |
603 |
862 |
1.3/4 |
325 |
761 |
1086 |
1.7/8 |
404 |
944 |
1348 |
2 |
496 |
1157 |
1653 |
2.1/4 |
717 |
1673 |
2389 |
2.1/2 |
994 |
2317 |
3311 |
2.3/4 |
1337 |
3118 |
4454 |
3 |
1748 |
4078 |
5826 |
Bolts Class | Diameter | Tensile Strength, min, ksi | Yield Strength, min, ksi | Elongation in 4D min, % | Reduction of Area, min, % | Bolts Hardness, max | |
1 | All Diameters | 75 | 30 | 30 | 50 | 223 HBW | 96 HRB |
2 | 3/4 and under | 125 | 100 | 12 | 35 | 321 HBW | 35 HRC |
Over ¾ to 1, incl. | 115 | 80 | 15 | 35 | |||
Over 1 to 1-1/4, incl. | 105 | 65 | 20 | 35 | |||
Over 1-1/4 to 1-1/2, incl. | 100 | 50 | 28 | 45 | |||
2B | 2 and under | 95 | 75 | 25 | 40 | 321 HBW | 35 HRC |
Over 2 to 2-1/2, incl. | 90 | 65 | 30 | 40 | |||
Over 2-1/2 to 3, incl. | 80 | 55 | 30 | 40 |
Bolts Grade and Class | Diameter | Tensile Strength Min KSI | Yield Strength 0.2% Offset KSI | Elongation in 4D, Min, % | Reduction of Area Min, % | Hardness Max Brinell | Bolts Hardness Max Rockwell |
---|---|---|---|---|---|---|---|
Classes 1 and 1D: B8, B8M, B8P, B8LN, B8ML | ALL | 75 | 30 | 30 | 50 | 223 | B96 |
Class 1: B8C, B8T | ALL | 75 | 30 | 30 | 50 | 223 | B96 |
Class 1A: B8A, B8CA, B8MA, B8PA, B8TA, B8LNA, B8MLNA, B8NA, B8MNA, B8MLCuNA | ALL | 75 | 30 | 30 | 50 | 192 | B90 |
Classes 1B & 1D: B8N, B8MN, B8MLCuN | ALL | 80 | 35 | 30 | 40 | 223 | B96 |
Class 1C and 1D: B8R | ALL | 100 | 55 | 35 | 55 | 271 | C28 |
Class 1C: B8RA | ALL | 100 | 55 | 35 | 55 | 271 | C28 |
Classes 1C and 1D: B8S | ALL | 95 | 50 | 35 | 55 | 271 | C28 |
Classes 1C: B8SA | ALL | 95 | 50 | 35 | 55 | 271 | C28 |
Class 2: B8, B8C, B8P, B8T, B8N | to 3/4″ | 125 | 100 | 12 | 35 | 321 | C35 |
over 3/4″ to 1″ | 115 | 80 | 15 | 35 | 321 | C35 | |
over 1″ to 1-1/4″ | 105 | 65 | 20 | 45 | 321 | C35 | |
over 1-1/4 to 1-1/2″ incl | 100 | 50 | 28 | 45 | 321 | C35 | |
Class 2 B8M, B8MN, B8MLCuN | to 3/4″ | 110 | 96 | 15 | 45 | 321 | C35 |
over 3/4″ to 1″ | 100 | 80 | 20 | 45 | 321 | C35 | |
over 1″ to 1-1/4″ | 95 | 65 | 25 | 45 | 321 | C35 | |
over 1-1/4 to 1-1/2″ incl | 90 | 50 | 30 | 45 | 321 | C35 | |
Class 2B: B8, B8M2 | to 2″ incl | 95 | 75 | 25 | 40 | 321 | C35 |
over 2″ to 2-1/2″ incl | 90 | 65 | 30 | 40 | 321 | C35 | |
over 2-1/2 ” to 3″ incl | 80 | 55 | 30 | 40 | 321 | C35 | |
Class 2C: B8M3 | to 2″ incl | 85 | 65 | 30 | 60 | 321 | C35 |
over2″ | 85 | 60 | 30 | 60 | 321 | C35 |
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