A193 B8M Class 2 Stud Bolt,A193 B8M Class 2 Hex Bolt,A194 Grade 8M Hex nuts
A193 B8M Class 2 Stud bolt
ASTM A193 Grade B8M Class 2 Bolts are manufactured from AISI 316 Stainless Steel carbide solution treated with Strain Hardening
ASTM A193 specifies the mechanical properties of bolts, screws and nuts made of austenitic (amongst others) stainless steels for high temperature or high pressure service and other special purpose applications.
In ASTM A193/A193M-11, austenitic steels are divided into 6 classes (1, 1A, 1B and 2, 2B and 2C) and 27 grades (B8, B8A, BBC, BBCA, B8M, B8MA, B8M2, B8M3, BBP, B8PA, B8N, B8NA, B8MNA, B8MNLCuN, B8MLCuNA, B8T, B8TA, B8R, B8RA, B8S, B8SA, B8LN, B8LBNA, B8MLN, and B8MLN, and B8LNA).
ASTM A193 B8M Class 2 stud bolts are commonly used in marine and other heavy industrial environments that require corrosion resistant fasteners to be used. It is offten incorrectly thought that B8 studs and fasteners (304 stainless) are mechanically weeker than B8M studs and fasteners (316 stainless steel).
A193 B8M Stud Bolt and A194 8M Hex Nuts
ASME B18.2.1 Stud Bolt &ASME B18.2.2 hex nuts
Type: Stud Bolts and Nuts.
Material: A193 B8M Stud Bolt and A194 8M Hex Nuts
Stub bolts Material: ASTM A193 B8M.
Nuts material: ASTM A194 8M.
Standard: ASME B18.2.1, ASME B18.2.2.
| A193 B7 | Alloy steel, AISI 4140/4142 quenched and tempered |
|---|---|
| A193 B8 | Class 1 Stainless steel, AISI 304, carbide solution treated. |
| A193 B8M | Class 1 Stainless steel, AISI 316, carbide solution treated. |
| A193 B8 | Class 2 Stainless steel, AISI 304, carbide solution treated, strain hardened |
| A193 B8M | Class 2 Stainless steel, AISI 316, carbide solution treated, strain hardened |
| A193 B16 | A heat-treated chromium-molybdenum-vanadium steel for high-pressure, high-temperature service. |
Mechanical Properties
Bolt -Grade Identification Markings
| Grade | Size | Tensile ksi, min | Yield, ksi, min | Elong, %, min | RA % min |
|---|---|---|---|---|---|
| A193 B7 | Up to 2-1/2 | 125 | 105 | 16 | 50 |
| 2-5/8 – 4 | 115 | 95 | 16 | 50 | |
| 4-1/8 – 7 | 100 | 75 | 18 | 50 | |
| A193 B8 Class 1 | All | 75 | 30 | 30 | 50 |
| A193 B8M Class 1 | All | 75 | 30 | 30 | 50 |
| A193 B8 Class 2 | Up to 3/4 | 125 | 100 | 12 | 35 |
| 7/8 – 1 | 115 | 80 | 15 | 35 | |
| 1-1/8 – 1-1/4 | 105 | 65 | 20 | 35 | |
| 1-3/8 – 1-1/2 | 100 | 50 | 28 | 45 | |
| A193 B8M Class 2 | Up to 3/4 | 110 | 95 | 15 | 45 |
| 7/8 – 1 | 100 | 80 | 20 | 45 | |
| 1-1/8 – 1-1/4 | 95 | 65 | 25 | 45 | |
| 1-3/8 – 1-1/2 | 90 | 50 | 30 | 45 | |
| A193 B16 | Up to 2-1/2 | 125 | 105 | 18 | 50 |
| 2-5/8 – 4 | 110 | 95 | 17 | 45 | |
| 4-1/8 – 7 | 100 | 85 | 16 | 45 |
Material Chemical Composition
| Element | A193 B7 (AISI 4140) | A193 B8 (AISI 304) | A193 B8M (AISI 316) | A193 B16 (AISI 4140) |
|---|---|---|---|---|
| Carbon | 0.37 – 0.49% | 0.08% max | 0.08% max | 0.37 – 0.49% |
| Manganese | 0.65 – 1.10% | 2.00% max | 2.00% max | 0.65 – 1.10% |
| Phosphorus, max | 0.035% | 0.045% | 0.045% | 0.035% |
| Sulfur, max | 0.040% | 0.030% | 0.030% | 0.040% |
| Silicon | 0.15 – 0.35% | 1.00% max | 1.00% max | 0.15 – 0.35% |
| Chromium | 0.75 – 1.20% | 18.0 – 20.0% | 16.0 – 18.0% | 0.75 – 1.20% |
| Nickel | 8.0 – 11.0% | 10.0 – 14.0% | ||
| Molybdenum | 0.15 – 0.25% | 2.00 – 3.00% | 0.15 – 0.25% |
Recommended Nuts,Bolts & Washer
| Bolt Grade | Nuts | Washers |
|---|---|---|
| A193 B7 | A194 Grade 2H | F436 |
| A193 B8 Class 1 | A194 Grade 8 | SS304 |
| A193 B8M Class 1 | A194 Grade 8M | SS316 |
| A193 B8 Class 2 | A194 Grade 8 | SS304 |
| A193 B8M Class 2 | A194 Grade 8M | SS316 |
Our supply scope:
MATERIAL GRADE OF BOLTS & NUTS
HIGH AND LOW TEMPERATURE
ASTM A193 / ASTM A320
ASTM A193 GR. B7 (AISI 4140, 4142, 4145)
ASTM A193 GR. B7M (AISI 4140, 4142, 4145)
ASTM A193 GR. B16
ASTM A320 GR. L7 (AISI 4140, 4142, 4145)
ASTM A320 GR. L7M (AISI 4140, 4142, 4145)
ASTM A320GR. L43 (AISI 8740)
ASTM A193/A320 GR. B8 CL. 2 (AISI 304)
ASTM A193/A320 GR. B8 CL. 1
ASTM A193/A320 GR. B8M CL. 2 (AISI 316)
ASTM A193/A320 GR. B8M CL. 1
ASTM A193/A320 GR. B8C CL. 2 (AISI 347)
ASTM A193/A320 GR. B8T CL. 2 (AISI 321)
SUPER HIGH TEMPERATURE &CORROSION RESISTANCE
ASTM A435 GRADE 660 CLASS A
ASTM A435 GRADE 660 CLASS B
ASTM A435 GRADE 660 CLASS C
ASTM A435 GRADE 660 CLASS D
SUPER DUPLEX UNS S31803
SUPER DUPLEX UNS S32750
SUPER DUPLEX UNS S32760
.
ASTM A194 NUTS MATERIAL FOR
ASTM A193 / ASTM A320
ASTM A194 GRADE 2H
ASTM A194 GRADE 2HM
ASTM A194 GRADE 4
ASTM A194 GRADE 7
ASTM A194 GRADE 7M
ASTM A194 GRADE 8 8T Stud bolt(AISI 304)
ASTM A194 GRADE 8M 8T Stud bolt(AISI 316)
ASTM A194 GRADE 8C (AISI 347)
ASTM A194 GRADE 8T Stud bolt (AISI 321)
We also can apply xylan fluorocarbon coating on the ASTM A194 GRADE 8M Class 2 Stud bolts,Xylan 1014 with red colors.
Xylan 1014 coated ASTM A194 GRADE 8M Class 2 Stud bolts
How to order our ASTM A194 GRADE 8M Class 2 Stud bolts？
Example#1，
STUD BOLTS ASTM A193 GRD B8M CLASS 2
02 HEAVY HEX NUT ASTM A194 GRD 8M
02 FLAT WASHER ASME B18.21.1, Type A, Narrow SS316
5/8“ UNC* 120mm，Quantity ：120 sets
