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Quanzhou ASTM A453 GR.660A Bolt
QS Fastener: Quanzhou ASTM A453 GR.660A Bolt
Name: Quanzhou ASTM A453 GR.660A Bolt
Size: 3/4 Inch
Length: 160mm
Material: ASTM A453 GR.660 CL.A
Standard: B18.31.2
Size: 3/4 Inch
Length: 160mm
Material: ASTM A453 GR.660 CL.A
Standard: B18.31.2
Quantity
ASTM A453 GR.660A Bolt is made from ASTM A453 GR.660 CL.A material, specifically designed for high strength and corrosion resistance, making it suitable for demanding industrial environments. With a size of 3/4 Inch and a length of 160mm, it complies with the B18.31.2 standard. Thanks to its excellent mechanical properties and high-temperature resistance, it is widely used in petrochemical, aerospace, energy, and chemical industries. ASTM A453 GR.660A Bolt is your ideal choice for stability and durability!
Let’s now discuss the high-temperature characteristics of ASTM A453 GR.660A Bolt.
Exceptional High-Temperature Performance
Operating Temperature Range: -200°C to +700°C, with long-term service temperatures up to 538°C.
Operating Temperature Range: -200°C to +700°C, with long-term service temperatures up to 538°C.
ASTM A453 GR.660A Bolt holds a significant position in high-end industrial applications due to its outstanding high-temperature performance. Below is a detailed analysis of its material properties, high-temperature mechanical performance, creep resistance, and practical application data.
1. Material Properties
Matrix Strengthening:
ASTM A453 GR.660A Bolt utilizes a precipitation-hardened nickel-based alloy. By adding elements such as Cr, Mo, Ti, and Al, it forms γ' phase (Ni3(Al,Ti)) and carbide strengthening phases, significantly enhancing high-temperature strength.
γ' Phase Stability: Below 700°C, the γ' phase remains stable, ensuring consistent high-temperature performance.
Matrix Strengthening:
ASTM A453 GR.660A Bolt utilizes a precipitation-hardened nickel-based alloy. By adding elements such as Cr, Mo, Ti, and Al, it forms γ' phase (Ni3(Al,Ti)) and carbide strengthening phases, significantly enhancing high-temperature strength.
γ' Phase Stability: Below 700°C, the γ' phase remains stable, ensuring consistent high-temperature performance.
Grain Structure:
Through double melting (VIM+ESR) and heat treatment processes, ASTM A453 GR.660A Bolt achieves a uniform and fine grain structure (ASTM E112 Grade 5-7), improving high-temperature creep resistance.
Through double melting (VIM+ESR) and heat treatment processes, ASTM A453 GR.660A Bolt achieves a uniform and fine grain structure (ASTM E112 Grade 5-7), improving high-temperature creep resistance.
2. High-Temperature Mechanical Properties
High-Temperature Strength:
At 538°C, the tensile strength of ASTM A453 GR.660A Bolt is ≥800 MPa, far exceeding that of ordinary stainless steel (e.g., 304SS, with tensile strength ≤400 MPa at 538°C).
High-Temperature Strength:
At 538°C, the tensile strength of ASTM A453 GR.660A Bolt is ≥800 MPa, far exceeding that of ordinary stainless steel (e.g., 304SS, with tensile strength ≤400 MPa at 538°C).
Yield Strength: At 538°C, the yield strength is ≥550 MPa, ensuring reliable connections in high-temperature environments.
High-Temperature Elongation:
At 538°C, the elongation of ASTM A453 GR.660A Bolt is ≥12%, superior to most high-temperature alloys (e.g., Inconel 718, with elongation ≤10% at 538°C).
At 538°C, the elongation of ASTM A453 GR.660A Bolt is ≥12%, superior to most high-temperature alloys (e.g., Inconel 718, with elongation ≤10% at 538°C).
High-Temperature Hardness:
At 538°C, the hardness remains above HRC 30, ensuring that ASTM A453 GR.660A Bolt does not easily deform at high temperatures.
At 538°C, the hardness remains above HRC 30, ensuring that ASTM A453 GR.660A Bolt does not easily deform at high temperatures.
3. Creep Resistance
Creep Strength:
Under conditions of 538°C/620 MPa, the creep rupture time of ASTM A453 GR.660A Bolt is ≥48 hours, outperforming similar materials.
Creep Strength:
Under conditions of 538°C/620 MPa, the creep rupture time of ASTM A453 GR.660A Bolt is ≥48 hours, outperforming similar materials.
Creep Rate: Under conditions of 538°C/200 MPa, the steady-state creep rate is ≤1×10⁻⁸/s, ensuring that connections do not fail due to creep during long-term use.
Stress Relaxation Resistance:
Under conditions of 538°C/initial stress of 70%, the stress retention rate of ASTM A453 GR.660A Bolt after 1000 hours is ≥75%, significantly better than ordinary alloys (e.g., 304SS, with stress retention rate ≤50%).
Under conditions of 538°C/initial stress of 70%, the stress retention rate of ASTM A453 GR.660A Bolt after 1000 hours is ≥75%, significantly better than ordinary alloys (e.g., 304SS, with stress retention rate ≤50%).
4. High-Temperature Performance Comparison
| Performance Indicator | ASTM A453 GR.660A Bolt | 304 Stainless Steel | Inconel 718 |
| Tensile Strength at 538°C | ≥800 MPa | ≤400 MPa | ≥900 MPa |
| Yield Strength at 538°C | ≥550 MPa | ≤200 MPa | ≥600 MPa |
| Creep Rupture Time at 538°C | ≥48 hours (620 MPa) | ≤10 hours (620 MPa) | ≥50 hours (620 MPa) |
| Stress Retention Rate at 538°C | ≥75% (1000 hours) | ≤50% (1000 hours) | ≥80% (1000 hours) |
With its excellent high-temperature strength, creep resistance, and long-term stability, ASTM A453 GR.660A Bolt performs exceptionally well under high-temperature and high-pressure conditions. Whether in petrochemical, nuclear power, or aerospace applications, its performance significantly surpasses that of ordinary stainless steel and some high-temperature alloys, making it the ideal choice for connectors in high-temperature environments.
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