ASTM A453 grade 660 CL B Stud bolt Grade 660 Class B Hex nuts
China manufacturer of ASTM A453 grade 660 CL B Stud bolt Grade 660 Class B Hex nuts
ASTM A453-Grade 660 Stud Bolt is a low-carbon nickel-chromium-molybdenum-titanium-vanadium-boron alloy steel that is known for its excellent mechanical properties and resistance to corrosion. As a result, this material is used for the production of various critical components in high-temperature and high-pressure environments.
Key Features of ASTM A453 Grade 660
- High-Temperature Strength: Designed to withstand extreme temperatures up to 1200°F (650°C), making it ideal for furnace and turbine applications.
- Corrosion Resistance: Excellent resistance to oxidation and scaling due to its chromium and nickel composition.
- Durability: Superior creep and stress rupture strength compared to standard stainless steels.
- Versatility: Used for fasteners like bolts, studs, and nuts in high-stress environments.
ASTM A453 Gr. 660 Stud Bolts Equivalent Grade
| AISI | UNS | BS | Wr No. | En Name | DIN EN | JIS | AMS | ASTM | other names | Additional Requirements | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 660 | S66286 | HR 51 | 1.4944 | X6NiCrTiMoV26-15 | 10269 | SUS 660 | 5726 | ASTM A453 GRADE 660A | incoloy a286 | NACE MR-0175 | |
ASTM A453 Gr. 660 Stud Bolts Chemical Composition
| Element | Grade 660 |
| Carbon | 0.08 max |
| Manganese | 2.00 max |
| Phosphorus, max | 0.040 max |
| Sulfur, max | 0.030 max |
| Silicon | 1.00 max |
| Nickel | 24.0-27.0 |
| Chromium | 13.5-16.0 |
| Molybdenum | 1.00-1.50 |
| Tungsten | … |
| Titanium | 1.9-2.35 |
| Columbium * | … |
| Aluminum | 0.35 max |
| Vanadium | 0.10-0.50 |
| Boron | 0.001-0.010 |
| Copper | – |
Material Classes
ASTM A453 Grade 660 is categorized into four classes: A, B, C, and D, each defined by specific mechanical properties and heat treatments.
| Class | Tensile Strength (ksi) | Yield Strength (ksi) | Elongation (%) | Reduction of Area (%) |
|---|---|---|---|---|
| A | 85-110 | 30-50 | 25 | 40 |
| B | 100-125 | 50-80 | 20 | 35 |
| C | 115-140 | 85-105 | 18 | 35 |
| D | 130-160 | 105-120 | 15 | 30 |
ASTM A453 Gr. 660 B Stud Bolts Specification
Type :
Full threads, Partial Threads, and customized as per requirements.
SIZE :
Nom Dia: ¼ to 4″ [6-100 mm]
Tailor made if required.
Length: As Per Standard or Upto any Length
SPECIFICATION / STANDARD :ASTM / ASME / BS / DIN / BS EN ISO
MATERIAL :1.4980,ASTM A453 grade 660
THREADS :UNC, 8UN, UNF, Metric Coarse & Fine Series.
Comparison of ASTM A453 Grade 660 Class A vs. Class B
The difference between ASTM A453 Grade 660 Class A and Class B lies primarily in their mechanical properties and intended applications, as defined by the specification. Both classes are made from the same austenitic stainless steel material but are subjected to different heat treatments, which result in variations in their tensile strength, yield strength, and elongation.
| Property | Grade 660 Class A | Grade 660 Class B |
|---|---|---|
| Tensile Strength | 85-110 ksi (586-758 MPa) | 100-125 ksi (689-862 MPa) |
| Yield Strength | 30-50 ksi (207-345 MPa) | 50-80 ksi (345-552 MPa) |
| Elongation | Minimum 25% | Minimum 20% |
| Reduction of Area | Minimum 40% | Minimum 35% |
| Heat Treatment | Solution annealed and aged | Solution annealed and aged |
| Applications | Used in less critical high-temperature and high-stress environments. | Used in more demanding environments requiring higher strength. |
ASTM A453 Grade 660 is a specification for high-strength, heat-resistant bolting material primarily used in high-temperature and high-pressure applications. The material is austenitic stainless steel and comes in various classes, each tailored to meet specific mechanical and chemical property requirements. It is commonly used in industries such as power generation, petrochemical, and aerospace.
