What are Stainless Steel 17-7 PH Bars?
Stainless Steel 17-7 PH Bars belong to the family of precipitation-hardening stainless steels, renowned for their excellent combination of strength, corrosion resistance, and formability. They derive their name from their composition—17% chromium, 7% nickel, and a significant amount of phosphorus. These bars are often used in applications where high strength and corrosion resistance are critical.
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Features of Stainless Steel 17-7PH Bars: Stainless Steel 17-7 PH Bars are available in various sizes and dimensions to suit different applications. Commonly, these bars come in diameters ranging from small sizes, such as 1/8 inch, to larger diameters exceeding several inches. Additionally, they are available in different lengths to accommodate specific project requirements. Manufacturers often provide a range of size options to ensure versatility and compatibility with diverse industrial needs.
Sizes of Stainless Steel 17-7PH Bars:Stainless Steel 17-7 PH Bars are available in various sizes and dimensions to suit different applications. Commonly, these bars come in diameters ranging from small sizes, such as 1/8 inch, to larger diameters exceeding several inches. Additionally, they are available in different lengths to accommodate specific project requirements. Manufacturers often provide a range of size options to ensure versatility and compatibility with diverse industrial needs.
Specifications | AMS 5528, ASTM A 693 , ASME SA 693 |
Dimension Standard | EN, DIN, JIS, ASTM, BS, ASME, AISI |
Bar Diameter | 3 ~ 800mm |
Hex Bar size | 2-100mm A/F |
Flat bar size | Thickness: 2 -100mm. Width: 10 to 500mm. |
Square bar size | 4 to 100mm |
Rectangular Bars | Size: 33 x 30mm to 295 x 1066mm. Thickness: 3.0 to 12.0mm. |
Hollow Bars | 32mm OD x 16mm ID to 250mm OD x 200mm ID) |
Billet Size | 1/2 to 495mm Diameter |
Finish | Cold (bright) drawn, centreless ground, hot rolled, smooth turned, peeled, slit rolled edge, hot rolled annealed, Rough Turned, Bright, Polish, Grinding, Centreless Ground & Black |
Tolerance | H8, H9, H10, H11, H12, H13K9, K10, K11, K12 or as per clients requirements |
Bar Surface | Bright, Hot Rolled Pickled, Cold Drawn, Sand Blasting Finished, Polished, Hairline |
Rolled Bars Condition | Hardened & tempered, annealed |
Cold Rolled Bar Technique | Hot Rolled, Cold Drawn, Cold Rolled, Forged Round Bar, Rod |
Form | Round, Rod, T-Bar, Channel Bar, Precision Ground Bar, Flat Bar, Square, Blocks, Round Rod, Rings, Hollow, Triangle, Rectangle, Hex (A/F), Threaded, Half Round Bar, Profiles, Billet, Ingot, I/H Bar, Forging etc. |
Melting
The first step in the process is melting raw materials in an electric furnace. These raw materials are typically iron ore, chromium, nickel, and other elements in exact amounts.
Hot Rolling
After being heated, the billets are shaped into long, thin rods by going through a series of rolling mills. Because the metal is heated above its recrystallization temperature during this operation, it is known as hot rolling.
Pickling
The pickling process is used to the bars in order to eliminate any oxide, scale, or other surface contaminants. Usually, an acid solution is used for this.
Cutting
Lastly, shearing machines or other cutting techniques are used to cut the rods to the required length.
STANDARD | UNS | WNR. |
SS 17-7PH | S17700 | 1.4541 |
Stainless Steel 17-7 PH Bars are primarily composed of iron, chromium, nickel, and phosphorus. The exact composition typically includes approximately 17% chromium, 7% nickel, 1.5% aluminum, and 0.75% molybdenum, with trace amounts of other elements. This precise blend of elements contributes to the unique properties of the alloy, including its strength, corrosion resistance, and machinability.
Grade | C | Mn | Si | P | S | Cr | Ni |
SS 17-7PH | 0.09 | 1.0 max | 1.0 max | .04 | 0.04 | 16.0 – 18.0 | 6.50 – 7.75 |
Grade | Yeild Strength | Tensile Strength | Elongation | Rockwell Hardness |
SS 17-7PH | 140000 psi | 170000 psi | 6% | 38 |
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The versatility and superior properties of Stainless Steel 17-7 PH Bars make them well-suited for a wide range of applications across various industries. They are commonly used in aerospace components, where high strength-to-weight ratio materials are essential for aircraft structures and components. Additionally, these bars find applications in the automotive industry for manufacturing critical components like springs and washers. Their corrosion resistance and formability make them suitable for use in marine environments, such as marine shafts and fittings. Other applications include chemical processing equipment, nuclear reactors, and medical devices, where reliability, durability, and corrosion resistance are paramount.
Stainless Steel 17-7 PH Bars play a crucial role in industries requiring high-performance materials capable of withstanding demanding conditions. With their unique combination of strength, corrosion resistance, and formability, these bars continue to be a preferred choice for various critical applications.
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