Phone Numbers -
 

Email ID - 

sales@www.nknutbolt.com

Physical Address​ - 

Shop No- 6B, Ground Floor, Sindhi Ln, opposite Municipal School, Charni Road East, Cawasji Patel Tank, Girgaon, Mumbai, Maharashtra 400004

 

Stainless Steel B8M Bolts

ss b8m bolts

ASTM A193 B8M Fasteners, ASME SA 193 Gr B8M Bolts, Stainless Steel B8M Bolts Manufacturer and Supplier in Mumbai, India

 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.

ASTM A193 B8M Bolts Specification

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

Stainless Steel A193 B8M Bolt Torque Chart

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

ASTM A193 B8M Bolts Available Grades

  • ASTM A193 B7: Alloy steel, AISI 4140 or 4142, quenched and tempered
  • ASTM A193 B6 : Stainless steel, AISI 410, heat treated
  • ASTM A193 B8 : Class 1 Stainless steel, AISI 304, carbide solution treated.
  • ASTM A193 B8M Bolts : Class 1 Stainless steel, AISI 316, carbide solution treated.
  • ASTM A193 B8 Class 2 Stainless steel, AISI 304, carbide solution treated, strain hardened
  • ASTM A193 B8M Class 2  Stainless steel, AISI 316, carbide solution treated, strain hardened
  • ASTM A193 B8T: Class 1 or 2 Stainless steel, AISI 321, with additional element of Titanium
  • ASTM A193 B16: Chromium-Molybdenum-Vanadium, similar to B7 with Vandium added
  • ASTM A193 B7M  Similar properties as B7 but with specialized heat treating to create differing mechanical properties
  • ASTM A193 B8R: Stainless steel, AISI 209, also known as Nitronic 50, nitrogen strengthened
  • ASTM A193 B8S: Stainless Steel, AISI 218, also known as Nitronic 60, nirtrogen strengthened

SS B8M Bolts Mechanical Properties

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

A320 B8M Bolts Hardness Chart

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
Stainless Steel B8M Bolts Supplier and Exporter
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