Are the ASTM A193 b8m stud bolt machined or forged? What are the advantages of each method?

ASTM A193 b8m stud bolt are available in both machined and forged.

Machined- in this process fist the raw material is to be selected and then it is processed through various machine-controlled process which includes CNC machining, heat treatment, surface finishing, thread rolling, coating and inspection and after all these processes the final product stud bolt is ready.Machined process delivers products with high accuracy and precision. This method also provides durability, high strength and smooth surface finish to the SA 193 Gr b8m studs.

Hot forging method-this method involves the deformation of the bolt head by inducing heat followed by recrystallization of the metal temperature and then bend it to obtain the required specific shape and size of Stud A193 b8m.

This process has several other steps which includes uncoiling, straightening, cutting and cold forging. Hot forging process provides strong heat application and mechanical properties to the materials.

SA 193 Gr B8M threaded rod manufacturer in India

ASTM A193 B8M stud bolt manufacturer in india

How are the threads on the SA 193 Gr b8m studs created?

Thread rolling process which is a cold forming method uses a collection of hardened steel dies to make threads on the SA 193 Gr B8M studs.
The rolling dies which are used in this process are optically ground and cold form the thread over a pre-machined blank which leads to the formation of virtually perfect threads on Stud bolt b8m with high accuracy and pitch.

This thread rolling studs are far superior than traditional cut threads in terms of strength and mechanical properties.

We are the most affordable supplier of ASTM A193 grade B8M studs and threaded studs in Mumbai in UNF, UNC & Extra Fine UNEF threads

ASTM A193 B8M stud bolt

ASTM A193 B8M Stud Bolt

ASTM A193 grade B8M threaded rod

ASTM A193 Grade B8M Threaded Rod

Stud A193 B8M

Stud A193 B8M

What is the difference between UNC and UNF ASTM A193 Grade b8m threaded rod?

The common difference between UNC and UNF thread types in ASTM A193 Grade B8m threaded rod is UNC is represented as the course thread of United States thread UN series which consists a large tooth shape and pitch whereas the UNF stands for United Fine Thread that is composed of fine teeth.

As leading stockist, we supply A193 gr B8M threaded bar and double end stud bolts which are suitable for the petrochemical, gas and oil industries

ASTM A193 B8M stud bolt specifications

ASTM A193 B8M stud bolt specifications

Length Size Hardness Specifications
3mm – 200mm M2 – M160 223 HBW ASTM A193 / ASME SA193
Imperial Threads Temperature range Head Drive Coating
ASME, BSW, BSF -325ºf (-198ºc) to +1000ºf (+538ºc) Phillips/Slot, Phillips, Slotted, Six-Lobe PTFE, zinc plated, black phosphate, hot dip galvanized
Metric Thread Diameter International Standard Application
ISO, ASME 3/4″ – 1-1/2″ BS 84, ISO 268, ISO 68-1, ASME B1.1, ASME B1.13M, ISO 724, BS 3643
  • Petrochemical
  • Oil and Gas
  • Power Generation
How to measure stud A193 B8M head size & length?

There are various methods to measure stud A193 b8m head size and length:

Analyse the diameter and pitch or thread count of the stud in which the diameter is referred as the width of the stud and thread count or pitch is actually the number of threads per inch.Utilizing a ruler to calculate the distance along the edge of the stud.Using of calliper or measuring tape to measure the length of the stud from end to end.

We are the certified stockholder of SA 193 B8M welded stud bolt and fully threaded studs as quickly as possible with all essential documentation
What are the types of ASTM A193 b8m threaded studs used in the petrochemical industry?

ASTM A193 b8m threaded Studs are very versatile and available in various types that are used in the petrochemical industries which includes half threaded stud bolts, fully threaded stud bolts, single end stud bolts and double ended stud bolts.
These bolts have excellent corrosion resistant properties against many harsh chemicals, acids, salts and alkalis which makes them to be used in petrochemical industries.

ASTM A193 Grade B8M stud bolt types

SA 193 GR B8M studs

SA 193 Gr B8M studs

  • Sizes: M2 – M160
  • Length: 3mm – 200mm
  • Diameter: 3/4″ – 1-1/2″
  • Coatings: PTFE, black phosphate, zinc plated, hot dip galvanized

ASTM A193 B8M threaded studs

ASTM A193 B8M Threaded Studs

  • Hardness : 223 HBW
  • Tensile strength: 75 ksi or 515 Mpa
  • Applications: Pressure piping & pressure vessels bolting
  • Temperature range: -325ºf (-198ºc) to +1000ºf (+538ºc)

A193 GR B8M threaded bar

A193 GR B8M Threaded Bar

  • Yield strength: 30 ksi or 205 Mpa
  • Equivalent grade : AISI 316/316L stainless steel
  • Thread types: Metric, Metric Fine, BSW, BSF, UNC, UNF and BA
We are trusted source for  B8M stainless steel studs in large or small quantities at a genuine price with temprature range from -325ºf (-198ºc) to +1000ºf (+538ºc)
Why are A193 gr 8m threaded bar heat-treated?

There are various advantages for which the heat-treated method is applied on A193 gr 8m threaded Bar:
Heat treatment process provides higher creep property to the threaded bar along with better stress to rupture.
This method also provides higher tensile strength to the material.
This process also induces strong high temperature application in the threaded bar.

Tensile stress areas and threads per inch of stud A193 B8M
Nominal Size, inch. UNF- Fine Threads UNC -Coarse Threads 8UN -8 Thread Series
Stress AreaA, in2 Threads / inch Stress AreaA, in2 Threads / inch Stress AreaA, in2 Threads / inch
3/18 0.0878 24 0.0775 16
7/16 0.1187 20 0.1063 14
1 1/2 1.5810 12 1.4050 6 1.49 8
5/16 0.0580 24 0.0524 18
1/2 0.1599 20 0.1419 13
1/4 0.0364 28 0.0318 20
5/8 0.2560 18 0.2260 11
9/16 0.2030 18 0.1820 12
3/4 0.3730 16 0.3340 10
1 0.6630 12 0.6060 8
7/8 0.5090 14 0.4620 9
1 1/4 1.0730 12 0.9690 7 1.000 8
1 1/8 0.8560 12 0.7630 7 0.790 8
1 3/8 1.3150 12 1.1550 6 1.233 8
Marking of A193 gr 8m threaded bar
Grade Symbol Class Manufacturer’s Mark
B8MSH Class 2 Hilton Steel
B8Y or B8MN Class 1B
B8M Class 1
B95 Class 1D
Dimensions of SA 193 gr B8M studs
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
Standards of A193 b8m double end stud bolts
Studs ASME ISO DIN UNI
Metric Imperial
Double End Threaded B18.31.1M B18.31.2 2509 / 2510
Full Threaded Stud B18.31.1M B18.31.2 976 6610
Tap End Threaded 938 / 939 / 940 5911
A193 GR B8M welded stud bolt chemical composition
Carbon, maximum Phosphorus, maximum Manganese, maximum Sulfur, maximum Chromium Silicon, maximum Molybdenum
0.08 0.045 2.00 0.030 16.0 – 18.0 1.00 2.00 – 3.00
SA 193 B8M fully threaded studs mechanical properties
Grade Tensile Strength Diameter Yield Strength Reduction Elongation Hardness
Grade B8M, B8MLCuN, Class 2 760 M20 and under 655 45 15 321 HBW or 35 HRC
Grade B8, B8M, Class 1, 1D 515 All Diameters 205 50 30 223 HBW or 96 HRB
Grade B8M, B8MLCuN, Class 2 655 M24 to M30, inclusive 450 45 25 321 HBW or 35 HRC
Grade B8M, B8MLCuN, Class 2 690 M20 to M24, inclusive 550 45 20 321 HBW or 35 HRC
Grade B8M, B8MLCuN, Class 2 620 M30 to M36, inclusive 345 45 30 321 HBW or 35 HRC
B8M stainless steel studs recommended grades
Nut Specification Washer Specification
ASTM A194 Grade 8M ASTM A240 TP316
Stud bolt B8M tensile class
Property Description
Class 2 Carbide Solution Treated & Strain Hardened
Class 1 Carbide Solution Treated