How do I choose the appropriate size for ASTM A193 B7M Bolts?

This specification covers fasteners made from chromium-molybdenum stainless steel that undergoes heat treatment. Hilton Steel can supply ASTM A193 B7M bolts in sizes up to 4 inches or higher (4 to 7 inches).
Selecting the right size for your fasteners is imperative for long-term durability.

We advise buyers to consider the bolt shank length, threading, and diameter while choosing ASTM A 193 GR B7M anchor bolts. Other crucial considerations are:

  • The amount of load it will withstand
  • The environment it will operate in
  • The thread pitch of the A193 B7M stud bolt, i.e., the number of threads in an inch or the distance between two adjacent threads

SA 193 grade B7M studs and hex bolts manufacturer in India

ASTM A193 B7M bolts manufacturer in india

What coating options are available for SA 193 Grade B7M studs?

These studs are ideal for challenging environments due to their strength and corrosion resistance. An SA 193 B7M stud bolt exhibits a tensile strength of 100 ksi or around 690 MPa. The yield strength is roughly 75 ksi or 517 MPa. However, protective coatings can enhance the metallurgical properties at an additional cost.

Our company can deliver ASTM B7M socket head cap screws with PTFE, xylan, and cadmium coats. Galvanisation (hot-dip) is also a popular option, using zinc to up the corrosion resistance of the component.

If you are looking for B7M material supplier in Mumbai, you are at right place, buy A193 B7M stud bolt in custom sizes

ASTM A193 B7M bolts

ASTM A193 B7M bolts

A193 B7M stud bolt

A193 B7M stud bolt

A193 GR B7M hex bolts

A193 GR B7M hex bolts

Are A193 GR B7M Hex Bolts magnetic?

Yes. Since A193 GR B7M hex bolts use AISI 4140, they display magnetic properties. It is a ferritic grade, i.e., it contains a sizable quantity of ferrites (iron compounds), which makes its crystalline structure respond to a magnet.

The minimum carbon content in a B7M steel heavy hex bolt is 0.28%.
Buyers can demand demagnetisation procedures for these fasteners to match application-specific needs.

As stockist we keep bulk stock of ASTM A193 B7M threaded rod and anchor bolts at best price in India

ASTM A193 B7M bolts specifications

ASTM A193 B7M bolts specifications

Specifications Length Hardness Size
ASTM A193 / ASME SA193 3mm – 200mm 99 HRB M2 – M 160
Coating Heat Treatment Test Certificate Origin
PTFE, black phosphate, zinc plated, hot dip galvanized Q & T 620º C minimum. EN 10204 / 3.1
  • Korea
  • South America
  • Japan
  • East Europe
Application Thread Process Delivery time
  • IGC Test
  • Hardness Test
  • PMI Test
  • Tensile Testing
UNR, UNF, Cut, UNC, Rolled, UNJ etc. Cold Forging, CNC and Machining, Hot forging within 7 days

 

What type of thread is commonly used for an A193 B7M stud bolt?

A193 B7M studs generally use UNC (Unified National Coarse) or 8 TP for components over 1 inch in diameter. The latter represents 8-UN or eight threads per inch if measured along the length of the bolt.

The threading specification is an essential factor to guarantee compliance with your application. We request customers to specify the thread pitch they desire with the size and processing needed for the fastener.

Only the best and tested quality ASME SA 193 gr B7M socket head cap screws and eye bolt offered by us with high power ultrasonic inspection reports
Types of ASTM A193 Grade B7M bolts

B7M material

B7M material

  • Sizes: M2 – M 160
  • Length: 3mm – 200mm
  • Coatings: PTFE, black phosphate, zinc plated, hot dip galvanized

ASTM A193 B7M threaded rod

ASTM A193 B7M threaded rod

  • Tensile strength: 100 Ksi
  • Diameter: 3/4″ to 1-1/2″
  • Temperature range: Q & T 620º C minimum.

SA 193 B7M stud bolt

SA 193 B7M stud bolt

  • Hardness : 99 HRB
  • Applications: Petroleum, Sewage, Water treatment and chemical construction
  • Yield strength: 75 Ksi
What specific ultrasonic testing methods are used for B7M material?

Extensive testing of B7M material guarantees its performance for various applications, like power plants and oil refineries. We use ultrasonic testing or UT (longitudinal beam) to detect defects, flaws, and discontinuities in the components.

Our quality control system gets handled by an expert team and contemporary testing mechanisms at each stage. The standard types of UT include pulse-echo and through-transmission.
Another crucial aspect of this specification is mandatory hardness testing for all the components (100%).

The recommended hardness value is 99 HRB.
We share all the test results and offer heat traceability in the Mill Test Certificates for an SA 193 Gr B7M eye bolt and other fasteners.

We are always ready to assist you with all SA193 B7M heavy hex bolt and square bolts supply requirement with short lead times
What are the 3 best corrosion protection methods for an ASTM A193 B7M threaded rod?

An ASTM A193 B7M threaded rod shows excellent corrosion resistance to chlorides and sulfides. It also resists hydrogen corrosion cracking. Its performance can be enhanced by one of these methods, depending on your requirements and budget:

  • Coating with zinc, cadmium or Teflon
  • Plating with nickel-phosphor or electroplating
  • Cathodic protection using sacrificial anodes like magnesium or the “Impressed Current” technique with inert anodes like graphite

SA193 B7M square bolts and rods are perfect for challenging environments involving high temperatures and pressures. For example, they frequently work in chemical processing, petroleum, construction, and sewage/wastewater treatment.

B7M steel heavy hex bolt chemical composition
Carbon Phosphorus, maximum Manganese, maximum Chromium Sulfur, maximum Silicon Molybdenum
0.37 – 0.49 0.035 0.65 – 1.10 0.75-1.20 0.040 0.15-0.35 0.15-0.25
A193 B7M studs mechanical properties
Grade Tensile Strength Diameter Yield Strength Reduction Elongation Hardness
A193 GR B7M 690 M100 and under 550 50 18 235 HBW or 99 HRB
690 M100 and over 515 50 18 235 HBW or 99 HRB
ASTM A193 B7M threaded rod material
Grade Raw Material Descriptions
B7M Chromium Molybdenum Alloy Steel, Quenched & Tempered
A193 B7M stud bolt recommanded grades
Bolting Grade Washer Grade Nut Grade
A193 Grade 7M ASTM F436 A194 Grade 2H, 2HM
A193 gr B7M hex bolts dimensions
NS (D) Across The Flats Thickness of Head Body Diameter Across the Corners
Force (minimum) Force (maximum) Head (minimum) Head(maximum) Dia (minimum) Dia(maximum) Corner (minimum) Corner (maximum)
m12 17.73 19.00 4.24 7.76 11.73 12.00 20.03 20.78
m90 125.50 130.00 54.26 57.74 89.13 90.00 143.07 150.11
m10 15.73 17.00 6.17 6.63 9.78 10.00 17.77 18.48
m20 29.16 30.00 12.12 12.88 19.67 20.00 32.95 34.64
m16 23.67 24.00 9.68 10.32 15.73 16.00 26.75 27.71
m14 20.67 22.00 8.51 9.09 13.73 14.00 23.35 24.25
m24 35.00 36.00 14.56 15.44 23.67 24.00 39.55 41.57
m36 53.80 55.00 21.63 23.38 35.61 36.00 60.79 63.51
m30 45.00 46.00 17.92 19.48 29.67 30.00 50.85 53.12
m42 62.90 65.00 25.03 26.97 41.38 42.00 71.71 75.06
m56 82.20 85.00 33.80 36.2 55.26 56.00 93.71 98.15
m48 72.60 75.00 28.93 31.07 47.38 48.00 82.76 86.60
m72 101.40 105.00 43.55 46.45 71.26 72.00 115.60 121.24
m64 91.80 95.00 38.68 41.32 63.26 64.00 104.65 109.70
m80 111.00 115.00 48.42 51.58 79.26 80.00 126.54 132.72
m100 140.00 145.00 60.10 63.9 99.13 90.00 159.60 167.43
Dimensions of ASTM A193 grade B7M heavy hex bolts
(D) Diameter (H) Head Height (D) Body Diameter Across the Corners © Across the Flats (F) (T) Thread Lengths
MAX MIN MAX MIN MAX MIN MAX MIN < 6” > 6”
1/2 0.364 0.302 0.515 0.482 1.01 0.969 0.875 0.85 1.25 1.5
7/8 0.604 0.531 0.895 0.852 1.66 1.589 1.438 1.394 2 2.25
1 1/8 0.78 0.658 1.149 1.098 2.093 2.002 1.812 1.756 2.5 2.75
1 0.7 0.591 1.022 0.976 1.876 1.796 1.625 1.575 2.25 2.5
1 1/4 0.876 0.749 1.277 1.223 2.309 2.209 2 1.938 2.75 3
3/4 0.524 0.455 0.768 0.729 1.443 1.383 1.25 1.212 1.75 2
2 3/4 1.869 1.632 2.827 2.711 4.907 4.688 4.25 4.112 5.75 6
1 1/2 1.036 0.902 1.531 1.47 2.742 2.622 2.375 2.3 3.25 3.5
5/8 0.444 0.378 0.642 0.605 1.227 1.175 1.062 1.031 1.5 1.75
1 3/8 0.94 0.81 1.404 1.345 2.526 2.416 2.188 2.119 3 3.25
1 3/4 1.196 1.054 1.785 1.716 3.175 3.035 2.75 2.662 3.75 4
2 1/4 1.548 1.327 2.305 2.214 4.041 3.862 3.5 3.388 4.75 5
2 1.388 1.175 2.039 1.964 3.608 3.449 3.125 3.025 4.25 4.5
2 1/2 1.708 1.479 2.559 2.461 4.474 4.275 3.875 3.75 5.25 5.5
3 2.06 1.815 3.081 2.961 5.34 5.102 4.625 4.475 6.25 6.
SA 193 B7M stud bolt dimensions
NPS No. Of Bolts Length (RF) DIA bolts (in) Length (RTJ)
3/4 4 65 1/2 …
1/2 4 55 1/2 …
1-1/4 4 70 1/2 85
1 4 65 1/2 75
1-1/2 4 70 1/2 85
2-1/2 4 90 5/8 100
2 4 85 5/8 95
3 4 90 5/8 100
4 8 90 5/8 100
3-1/2 8 90 5/8 100
5 8 95 3/4 110
8 8 110 3/4 120
6 8 100 3/4 115
10 12 115 7/8 125
14 12 135 1 145
12 12 120 7/8 135
16 16 135 1 145
20 20 160 1-1/8 170
18 16 145 1-1/8 160
24 20 170 1-1/4 185
Torque chart of A193 B7M threaded rod
TORQUE FOOT-POUND FORCE -LBS
Bolt
Diameter
Torque 70% Initial
Torque 30%
Final
Torque 100%
9/16 53 23 75
3/4 129 55 184
1 249 107 356
1⅛ 297 127 424
7/8 166 71 237
1/2 36 16 52
1⅜ 435 186 622
1⅞ 696 298 994
2¾ 2300 986 3285
1¼ 417 179 596
5/8 73 31 104
1⅝ 445 191 636
19/16 392 168 560
3 3008 1289 4297
2 853 366 1219
1½ 574 246 821
2½ 1709 733 2442
1¾ 561 240 801
2¼ 1234 529 1762
TORQUE NEWTON-METER
Bolt
Diameter
Torque 70% Initial
Torque 30%
Final
Torque 100%
1/2 49 22 71
9/16 72 31 102
1 338 145 483
1⅛ 403 172 575
7/8 225 96 321
5/8 99 42 141
1¼ 565 243 808
1½ 778 334 1113
2¾ 3118 1337 4454
19/16 531 228 759
1⅜ 590 252 843
3/4 175 75 249
1¾ 761 325 1086
1⅝ 603 259 862
1⅞ 944 404 1348
2¼ 1673 717 2389
2 1157 496 1653
2½ 2317 994 3311
3 4078 1748 5826
B7M anchor bolts dimensions
Anchor Bolt Size (D x L x C x T)
Diam. Hook Length Thread
1⁄2 2 10 4
1⁄2 2 8 4
1⁄2 4 18 4
5⁄8 2 8 4
1⁄2 2 12 4
5⁄8 2 10 4
5⁄8 4 18 6
5⁄8 3 12 4
3⁄4 3 6 4
5⁄8 4 20 6
3⁄4 3 8 4
3⁄4 4 12 4
3⁄4 3 10 4
3⁄4 4 14 6
3⁄4 4 16 6
3⁄4 4 15 6
3⁄4 4 18 6
3⁄4 4 24 6
3⁄4 4 24 7
3⁄4 4 18 8
3⁄4 4 30 6
3⁄4 4 36 7
3⁄4 4 30 7
7⁄8 4 18 6
11⁄4 5 36 12
1 4 18 6
1 4 24 6
1 4 12 4
1 4 36 7
1 4 36 6
1 4 36 12
11⁄4 6 42 7