17-7 PH Round Bars Manufacturer, Stockist and Exporter
17-7 PH round bars are premium precipitation hardening stainless steel bars widely used in aerospace, chemical, and industrial applications. Their excellent combination of strength, corrosion resistance, and toughness makes them highly versatile. These bars are available in various diameters and lengths to suit specific project requirements. They are often used in critical applications where reliability and performance under stress are essential. The alloy is designed to maintain high hardness while resisting deformation. It provides superior fatigue resistance in dynamic environments. The material can be supplied in solution-treated, aged, or tempered conditions depending on the usage.
The microstructure of 17-7 PH stainless steel is martensitic, which contributes to its high mechanical strength. Precipitation hardening through aging results in improved yield and tensile strength. This steel exhibits excellent stress corrosion cracking resistance, particularly in chloride-containing environments. It is suitable for manufacturing shafts, fasteners, and structural components in high-performance applications. The alloy can be polished to a bright finish, enhancing both aesthetics and corrosion resistance. Additionally, its magnetic properties make it useful in certain engineering applications. Proper heat treatment is critical to achieving the desired mechanical properties.
17-7 PH round bars have exceptional dimensional stability during and after fabrication. Machining can be done efficiently, though careful tool selection is necessary due to the material’s hardness. They are highly weldable with appropriate filler materials and post-weld heat treatments. The alloy can withstand repeated thermal cycling without losing strength or toughness. These bars are frequently used in aerospace springs, chemical processing equipment, and marine hardware. Their high fatigue resistance allows for long service life under cyclic loads. The material’s strength-to-weight ratio is superior, contributing to its preference in weight-sensitive applications.
Worldwide 17-7 PH Round Bars Manufacturer, Stockist and Exporter
Corrosion resistance is one of the hallmark features of 17-7 PH round bars. The chromium content provides a protective oxide layer, reducing surface corrosion and pitting. They perform well in mildly acidic environments, making them suitable for chemical plant components. With proper surface treatment, they are resistant to oxidizing and mildly reducing conditions. The alloy is also resistant to stress corrosion cracking in chloride solutions. Routine maintenance and cleaning further extend the material’s life in aggressive environments. This makes 17-7 PH an excellent choice for long-term structural applications exposed to moisture or chemicals.
Mechanical properties of 17-7 PH round bars vary with the heat treatment condition. In the solution-treated condition, they offer moderate strength and excellent ductility. Aging treatment increases tensile and yield strength significantly while slightly reducing elongation. Hardness values can reach up to 45 HRC depending on aging parameters. The material maintains high toughness, ensuring that it does not fail catastrophically under load. It is also resistant to creep at moderately elevated temperatures. These properties make it suitable for high-stress components like springs, bolts, and aerospace fittings. Choosing the correct aging schedule is critical to balance strength and ductility.
17-7 PH round bars are produced to strict standards ensuring uniform chemical composition and mechanical properties. The alloy contains approximately 17% chromium, 7% nickel, with minor additions of copper and columbium. These elements contribute to hardenability, corrosion resistance, and precipitation strengthening. The bars are supplied in multiple diameters ranging from small precision sizes to larger structural sections. Each batch undergoes quality inspection including hardness testing, dimensional checks, and sometimes ultrasonic testing. The material is often marked for traceability, ensuring that critical components meet engineering specifications. This makes 17-7 PH highly reliable for critical engineering applications.
Applications of 17-7 PH round bars are extensive and diverse. They are used in aerospace components like springs, fasteners, and landing gear parts due to their high strength-to-weight ratio. Marine and chemical industry applications benefit from the alloy’s corrosion resistance. They are also found in medical instruments, oil and gas equipment, and industrial machinery. The material can be fabricated into precision components requiring tight tolerances and excellent surface finish. Overall, 17-7 PH round bars combine durability, corrosion resistance, and high performance, making them ideal for demanding engineering environments. Its versatility ensures continued preference in industries requiring strong, corrosion-resistant stainless steel.
17-7 PH Round Bars Specifications
| Property | Value |
|---|---|
| Grade | 17-7 PH |
| Standard | ASTM A564 / AMS 5626 |
| Material Type | Precipitation Hardening Stainless Steel |
| Form | Round Bars |
| Surface Finish | Hot Rolled / Cold Drawn / Polished |
| Diameter Range | 6 mm – 150 mm (or as per requirement) |
| Length | 1000 mm – 6000 mm (standard) or custom |
| Heat Treatment | Solution Annealed, Age Hardened, or Tempered |
| Corrosion Resistance | Good, resistant to mild acids and chloride environments |
| Applications | Aerospace, Marine, Chemical, Springs, Fasteners |
Chemical Composition
| Element | Percentage (%) |
|---|---|
| Carbon (C) | 0.06 max |
| Chromium (Cr) | 16.0 – 18.0 |
| Nickel (Ni) | 6.5 – 7.5 |
| Copper (Cu) | 2.5 – 3.5 |
| Manganese (Mn) | 1.0 max |
| Silicon (Si) | 1.0 max |
| Phosphorus (P) | 0.04 max |
| Sulfur (S) | 0.03 max |
| Niobium + Tantalum (Nb+Ta) | 0.15 – 0.45 |
| Iron (Fe) | Balance |
Mechanical Properties
| Property | Solution Treated (Condition A) | Age Hardened (Condition H900) | Age Hardened (Condition H1075) |
|---|---|---|---|
| Tensile Strength (MPa) | 930 – 1100 | 1400 – 1500 | 1100 – 1200 |
| Yield Strength (MPa) | 550 – 750 | 1300 – 1400 | 950 – 1050 |
| Elongation (%) | 20 – 25 | 6 – 10 | 12 – 15 |
| Hardness (HRB / HRC) | 75 – 95 HRB | 43 – 45 HRC | 35 – 38 HRC |
| Impact Toughness (J) | 60 – 80 | 40 – 50 | 50 – 60 |
Dimensions
| Diameter (mm) | Tolerance (mm) | Standard Length (mm) | Notes |
|---|---|---|---|
| 6 – 10 | ±0.1 | 1000 – 3000 | Cold drawn / precision bars |
| 12 – 25 | ±0.15 | 1000 – 4000 | Hot rolled or cold drawn |
| 28 – 50 | ±0.2 | 2000 – 6000 | Hot rolled, straightened |
| 55 – 100 | ±0.25 | 2000 – 6000 | Structural and industrial applications |
| 110 – 150 | ±0.3 | 3000 – 6000 | Custom sizes available on request |
Equivalent Grades
| Standard | Designation / Grade |
|---|---|
| ASTM / ASME | A564 Type 630 |
| UNS | S17700 |
| EN / European | 1.4568 |
| JIS (Japanese) | SUS630 |
| Aerospace / AMS | AMS 5626 / AMS 5662 |
| Other | DIN X10CrNiCu17-7 |
Weight Chart (Approx.)
| Diameter (mm) | Weight per Meter (kg/m) |
|---|---|
| 6 | 0.222 |
| 8 | 0.395 |
| 10 | 0.617 |
| 12 | 0.888 |
| 16 | 1.580 |
| 20 | 2.470 |
| 25 | 3.850 |
| 32 | 6.320 |
| 40 | 9.870 |
| 50 | 15.40 |
| 65 | 26.30 |
| 80 | 39.50 |
| 100 | 61.60 |
| 125 | 95.40 |
| 150 | 139.0 |
The applications of our 17-7 PH round bars include oil & gas projects, chemical processing plants, desalination systems, shipbuilding, aerospace, automotive, and heavy engineering. With superior resistance to oxidation and stress corrosion cracking, our bars perform reliably in extreme environments. Whether it is for large-scale infrastructure projects in Mumbai or precision engineering in Germany and the USA, Shakti Forge India remains the first choice for industries that demand excellence.
As one of the most reliable 17-7 PH Round Bars Manufacturer, Stockist and Exporter, Shakti Forge India continues to expand its presence in domestic and international markets. Our focus on quality, timely delivery, and customer satisfaction makes us a preferred partner for leading industries across the globe. For bulk requirements or customized solutions, Shakti Forge India ensures the highest level of product integrity and service excellence.
Frequently Asked Questions (FAQs)
- Q:1What is 17-7 PH stainless steel?
- 17-7 PH is a precipitation hardening stainless steel alloy known for its high strength, excellent corrosion resistance, and good toughness. It is widely used in aerospace, marine, and chemical industries.
- Q:2What are the common applications of 17-7 PH round bars?
- They are used for springs, fasteners, shafts, aerospace components, chemical processing equipment, and other high-strength applications where corrosion resistance is important.
- Q:3What heat treatment conditions are available for 17-7 PH?
- The bars can be supplied in solution-treated (Condition A), age-hardened (H900, H1075), or tempered conditions depending on the required mechanical properties.
- Q:4How corrosion-resistant is 17-7 PH?
- It has good corrosion resistance in mildly acidic environments and is resistant to chloride-induced stress corrosion cracking, making it suitable for marine and chemical applications.
- Q:5Can 17-7 PH round bars be welded?
- Yes, they are weldable using appropriate filler materials. Post-weld heat treatment is often required to restore mechanical properties.
Cities we have supplied our products to
Mumbai, Delhi, Bengaluru(Bangalore), Hyderabad, Chennai, Kolkata, Pune, Ahmedabad, Surat, Vadodara, Rajkot, Nagpur, Indore, Bhopal, Jaipur, Kanpur, Lucknow, Agra, Varanasi, Amritsar, Chandigarh, Mysuru (Mysore), Udaipur, Jodhpur, Visakhapatnam, Coimbatore, Madurai, Kochi, Thiruvananthapuram, Mangalore, Nashik, Kolhapur, Chandrapur, Akola, Vilayat, Somnath, Dahej, Narmada, Ankleshwar, Navsari, Valsad, Rajpipla, Veraval,Kovvur, Andra Pradesh,Karwar, Karnataka,Kosamba, Gujarat, Vishakapatnam, Shahad, Pondicherry, Kakkinada, Pradesh, Nagda, Madhya Pradesh,Harihar, Karnataka, Tuticorin, Tamilnadu, Trivandrum, KeralaKurnool, Rourkela, Hindupur, Orissa, Renukoot, Uttar Morbi, Kerala ,Himachal, Dehradun, Visakhapatnam ,Jamnagar, Kozhikode, Ludhiana,Latur, Nanded, Vijaywada, Alwar, Bareilly, Bikaner, Andheri, Marol, Taloja, Turbhe, TTC (Thane-Belapur), Pimpri-Chinchwad, Chakan, Talegaon, Ranjangaon, Jejuri, Baramati, Satpur, Ambad, Sinnar, Igatpuri, Shendra, Waluj, Chikalthana, Paithan, Hingna, Butibori, Kalmeshwar, Umred, Shiroli, Kagal, Gokul Shirgaon, Akkalkot, Chincholi, Lote-Parshuram, Dombivli, Ambernath, Mahad, Roha, Palghar, Tarapur (Boisar)
Cities we have supplied our products to
South Korea, Africa, Sri Lanka, Syria, Taiwan, Tanzania, Tajikistan, Thailand, Turkey, Turkmenistan, Ukraine, United Kingdom, Arab Emirates (UAE), Uzbekistan, Vietnam, Yemen, France, Germany, Greece, Oman, Colombia, Portugal, Japan, Lithuania, Macau, Mongolia, Qatar, Ireland, Malaysia, Bangladesh, Russia, Iran, Jordan, Singapore, Bulgaria, Poland, Denmark, Nigeria, Gambia, Indonesia, Finland, Argentina, Chile, Spain, Peru, Kuwait, India, Saudi Arabia, Slovakia, Slovenia, Sweden, Switzerland, Bahrain, the Netherlands, United Kingdom, Mexico, Bulgaria, Spain, France, Germany, Colombia, Brazil, Saudi Arabia, Iraq, Iran, Sudan, Libya, Tanzania, Nigeria, New Zealand, Paris, Switzerland
Applications of 17-7 PH Round Bars
- Oil & Gas Industry – pipelines, offshore rigs, valves, and fittings
- Chemical Processing Plants – heat exchangers, reactors, and storage vessels
- Marine & Shipbuilding – propeller shafts, seawater systems, and pumps
- Aerospace – jet engines, turbine blades, and structural components
- Power Generation – nuclear plants, boilers, and steam generators
- Automotive – exhaust systems, sensors, and performance parts
- Pharmaceutical & Food Industry – equipment requiring hygiene and corrosion resistance
- Construction & Infrastructure – high-strength fasteners, joints, and supports