17-4PH Round bars

SS 17-4 PH Stockiest, Supplier, Exporter, Trader, Dealer.

Alloy 17-4 Stockiest, Supplier, Exporter, Trader, Dealer.

UNS S17400 Stockiest, Supplier, Exporter, Trader, Dealer.

17-4PH Stockiest, Supplier, Exporter, Trader, Dealer.

SAE / AISI 630 Stockiest, Supplier, Exporter, Trader, Dealer.

General Properties of 17-4PH SS, Alloy 17-4 PH, Stainless Steel 17-4 PH

SAE type 630 stainless steel (more commonly known as 17-4 PH; also known as UNS 17400) is a grade of martensitic precipitation hardened stainless steel. It contains approximately 15–17.5% (17) chromium and 3–5% (4) nickel, as well as 3–5% copper.

SS 17-4 is a chromium-copper precipitation hardening stainless steel that is used for applications requiring high strength and a moderate level of corrosion resistance. It is one of the most widely used precipitation hardening grades, as it has high strength hardness up to about 572°F while demonstrating good corrosion resistance in all heat treated conditions. Alloy 17-4 PH has adequate resistance to atmospheric corrosion or in diluted acid salts where its corrosion resistance is equivalent to Alloy 304 or 430. Alloy 17-4PH can be heat treated to a variety of temperatures to develop a wide range of properties. Its mechanical properties can be optimized with heat treatment where very high yield strength up to 180 ksi can be achieved. Alloy 17-4 should not be used at temperatures above 572°F or at very low temperatures.

Here are some benefits of 17-4 PH round bars. Listed below:

• High tensile strength and toughness
• Excellent corrosion resistance
• It is best suited for forging and welding
• Machinability operations
• Oxidation resistance
• Have a good resistance to sulphide stress cracking

Stainless Steel 17-4 PH / UNS S17400 Round Bars Specifications :

Applications of SS 17-4 PH / UNS S17400:

SS 17-4 PH is commonly used for applications requiring high strength and a moderate level of corrosion resistance. Some applications that frequently use Alloy 17-4 include:

Standards of SS 17-4 PH / UNS S17400 :

• ASTM/ASME: UNS S17400
• EURONORM: X5CrNiCuNb16.4
• AFNOR: Z6CNU17-04
• DIN: 1.4542
• S17400
• AISI 630
• NACE MR 0175
• ASTM A484/ A564
• AMS 2303/5643
• ASME SA564
• 4542
• X5CrNiCuNb16-4

Properties of SS 17-4 PH / UNS S17400 :

• Alloy 17-4 PH is a martensitic stainless steel having Cu and Nb/Cb in addition.
• A grade is its high strength.
• Hardness up to 300 degrees Celsius.
• Corrosion resistance.
• Optimized with heat treatment.
• High yield strength up to 160-190 ksi.

Corrosion Resistance of SS 17-4 PH / UNS S17400 :

• Withstands corrosive attacks better than any of the standard hardenable stainless steels.
• Comparable to Alloy 304 in most media.
• Corrosion resistant in some chemical, petroleum, dairy, and food process industries.
• Subject to crevice or pitting attack if exposed to stagnant sea water for any length of time.

Weldability of SS 17-4 PH / UNS S17400 :

• Successfully welded by most common fusion and resistance methods.
• Should not be joined by oxyacetylene welding.
• Generally no pre-heating required.
• Inter-pass temperature must be limited to 248°F.
• Better toughness is obtained in the weld after a complete heat treatment.

Processing – Hot Forming of SS 17-4 PH / UNS S17400 :

• To forge, heat uniformly to 2150 / 2200°F and hold for half hour per inch.
• Preferred temperature range for hot forming is at 650-900°F, while the steel is still austenitic.
• To ensure the best condition for the hardening operations, the forgings must be re-heat treated at 1875-1925°F.
• Cool forgings to below 90°F to ensure grain refinement.

Processing – Cold Forming of SS 17-4 PH / UNS S17400 :

• Alloy 17-4 is limited to mild operations since in the annealed (solution treated) condition the material is hard.
• For severe cold working the material should be heat treated to condition H1150. This will help prevent possible cracking.
• Bend radius in excess of 7T is often required.
• To improve stress corrosion resistance after cold forming, re-aging at the precipitation-hardening temperature is recommended.

Machinability of SS 17-4 PH / UNS S17400 :

• Can be machined in both solution-treated and precipitation-hardening conditions.
• Machining conditions may vary with hardness of material.
• High-speed tools or preferably carbide tools with standard lubrication are normally used.

Types of Available Products ASME, ASTM, EN, BS, GB, SS 17-4 PH Round Bars :