The 17-4 PH Round Bar is a high-strength, corrosion-resistant stainless steel bar widely used in industries requiring durability and moderate corrosion resistance. This precision-engineered round bar is made from 17-4 PH stainless steel, also known as grade 630, featuring a unique composition of 17% chromium, 4% nickel, 4% copper, and 0.3% niobium. It offers superior mechanical properties through precipitation hardening heat treatments, distinguished by its enhanced strength and thermal stability. The 17-4 PH Round Bar is ideal for manufacturing components in aerospace, chemical processing, petrochemical, and nuclear sectors, where performance under stress and exposure to corrosive environments is critical. Its coefficient of thermal expansion is significantly lower than that of 316L stainless steel, allowing applications involving thin film technologies or where dimensional stability is a key factor.
Key Features
| Features | Description |
|---|---|
| Material Type | 17-4 PH Stainless Steel (Grade 630) |
| Chemical Composition | 17% Chromium, 4% Nickel, 4% Copper, 0.3% Niobium |
| Mechanical Property | Precipitation hardened for high strength |
| Corrosion Resistance | Moderate corrosion resistance suitable for harsh environments |
| Thermal Expansion Coefficient | 6.0 x 10^-6 in/in/°F (H900 heat treatment) |
| Standard Shape | Round bar |
| Common Applications | Aerospace, chemical processing, petrochemical, nuclear, and thin film technology |
| Heat Treatment | H900 (precipitation hardening) |
| Durability | Excellent strength retention at elevated temperatures |
| Alternative Name | Stainless Steel Grade 630 |
| Attributes | Description |
|---|---|
| Grade | 17-4 PH (630) |
| Composition - Chromium | 17% |
| Composition - Nickel | 4% |
| Composition - Copper | 4% |
| Composition - Niobium | 0.3% |
| Physical Form | Round Bar |
| Heat Treatment | H900 (precipitation hardening) |
| Coefficient of Thermal Expansion | 6.0 x 10^-6 in/in/°F |
| Corrosion Resistance Level | Moderate |
| Applications | Aerospace components, chemical equipment parts, petrochemical machinery, nuclear technology, thin film technology |
| Manufacturing Standards | Complies with ASTM A564 |
*Disclaimer: The above description has been AI-generated and has not been audited or verified for accuracy. It is recommended to verify product details independently before making any purchasing decisions.
The 17-4 PH round bars undergo an H900 precipitation hardening heat treatment to significantly increase their strength and durability.
17-4 PH stainless steel has a lower coefficient of thermal expansion (6.0 x 10^-6 in/in/°F) than 316L stainless steel (approximately 9 to 11 x 10^-6 in/in/°F), which makes it more stable under thermal cycling.
Yes, due to its lower thermal expansion and heat resistance, 17-4 PH is used in thin film technology where high sputtering temperatures would normally degrade other materials.
Yes, the 17-4 PH round bar provides moderate corrosion resistance making it suitable for chemical processing and petrochemical applications.
Industries such as aerospace, chemical processing, petrochemical, nuclear energy, and electronics manufacturing often use 17-4 PH round bars for their mechanical strength and corrosion resistance.
17-4 is a chromium-nickel-copper precipitation hardening stainless steel used for applications requiring high strength and moderate level of corrosion resistance
The most well known precipitation hardening steel is 17-4 PH. The name comes from the additions 17% Chromium and 4% Nickel. It also contains 4% Copper and 0.3% Niobium. 17-4 PH is also known as stainless steel grade 630
17-4 pH stainless steel has a mean coefficient of thermal expansion of 6.0 x 10-6 in/in/°F with H900 heat treatment, whereas 316L ranges from approximately 9 to 11 x 10-6 in/in/°F. Technology such as thin film is limited to 17-4 PH because the temperature of the sputtering process is too high at the diaphragm
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