Product Highlights

1. Material compliance: ASTM B564 / ASME SB564, AMS 5644, AMS 5604; equivalent designation: 17‑4PH, Alloy 630, UNS S17400, DIN 1.4542 (X5CrNiCuNb16‑4)
2. Multiple forging forms available: open‑die / closed‑die forgings, forged blocks, discs, hubs, rolled rings, cylinders & sleeves, shafts, step shafts, gear blanks, flanges, custom shaped forgings
3. Large dimension capability: Forged blocks up to 27 inch width; discs/hubs max OD 50 inch, weight up to 20000 lbs; rolled rings max OD 84 inch; shafts maximum length 144 inch
4. Adjustable mechanical properties via aging heat‑treatment: Condition A (solution annealed), H900, H925, H1025, H1075, H1100, H1150 condition; retains good mechanical performance up to 316℃ (600℉)
5. Balanced comprehensive performance: high strength, good toughness, moderate corrosion resistance comparable to 304 stainless steel, good weldability and machinability in solution‑annealed state
6. Strict forging process control: hot forging, stress relieving, full non‑destructive inspection; MTC 3.1 / 3.2 material test certificate provided for export projects
7. Flexible order support: custom per customer drawings, accept prototype small‑batch trial orders and large‑volume industrial project procurement
8. One‑stop service: forging + heat‑treatment + rough / finish machining, deliver semi‑finished or fully‑machined forging components

Product Overview

17‑4 PH (UNS S17400 / 1.4542 / Alloy 630) is martensitic copper‑niobium precipitation‑hardening stainless‑steel forging stock. After solution annealing followed by different aging heat‑treatment, forgings can achieve adjustable tensile strength, yield strength and hardness, combining high mechanical strength, acceptable toughness and moderate atmospheric corrosion resistance.

We produce diversified 17‑4PH forgings by open‑die and closed‑die hot forging technology, including blocks, discs, hubs, rolled rings, cylinders, sleeves, various shafts, gear blanks and special custom shapes. The material maintains reliable mechanical properties for long‑term service below 316°C. Good machinability in solution‑annealed condition, and acceptable welding performance for forging assemblies.

Our forgings are widely supplied for aerospace, defense, oil‑gas, offshore, energy, paper‑making, medical and heavy‑duty mechanical equipment. We can provide raw forged blanks or finished machined parts according to customer drawings.

Material Grade Characteristics

17‑4 PH (Alloy 630, UNS S17400, 1.4542) Precipitation‑Hardening Martensitic Stainless Steel

• Martensitic precipitation‑hardening stainless steel with chromium, nickel, copper and niobium alloying elements. Strength and hardness are significantly improved after aging heat‑treatment (H900 / H925 / H1025 / H1075 / H1100 / H1150).
• Retains good strength and toughness up to 316 °C (600 °F); both base metal and welded joints exhibit decent toughness.
• Corrosion resistance is comparable to AISI 304 stainless steel, suitable for atmospheric, fresh‑water and mild corrosive environments; not recommended for heavy chloride‑rich marine environment without extra protection.
• Condition A (Solution‑annealed state): Limited formability; hot forming is preferred. Excellent machinability; customers can machine first and then perform aging treatment to minimize component dimensional distortion.
• Available in multiple forging configurations: open‑die, upset forging, closed‑die forging, mandrel‑forged rolled rings.

Chemical Composition (Weight %)

Note: Chemical composition conforms to ASTM B564, AMS 5644, AMS 5604 specification.

Typical Mechanical Properties (AMS 5643 Bar / AMS 5604 Sheet‑Plate)

17‑4PH Bar / Forging (AMS 5643)

17‑4PH Sheet & Plate (AMS 5604, thickness＜0.1874 inch)

Note: Actual values depend on product form, thickness and production lot, refer to official mill test report for final data.

Related Material Grades

1. Precipitation‑Hardening Stainless Forgings: 17‑4PH(630), 15‑5PH, 17‑7PH
2. Martensitic Stainless Forgings: 410, 420, 440C
3. Austenitic Stainless Forgings: 304, 316L, 321
4. Duplex & Super‑Duplex Forging: 2205, 2507(S32750)
5. High‑Strength Alloy Forgings: Inconel 718, Incoloy 825, Hastelloy C276
6. Carbon & Alloy Steel Forgings: 4130, 4140, A105, F22

Key Advantages

Tunable Mechanical Properties via Aging Treatment

Select H900 for highest hardness & strength; H1150 for maximum toughness and impact resistance; also support intermediate H1075 / H1100 condition, to satisfy different load‑bearing design requirements.

Good Combination of Strength‑Toughness‑Corrosion Resistance

High mechanical strength after aging, good toughness of base metal & weld joints, corrosion performance close to 304 stainless for general industrial environments.

Large‑Size Complex‑Shape Forging Capacity

Support open‑die / closed‑die forging for blocks, discs, rings, hubs, shafts and custom special forgings, covering small blanks up to heavy large‑size forgings.

Low‑Distortion Processing Route

Machine components in soft solution‑annealed Condition‑A state, then conduct aging heat‑treatment, effectively reduce finished‑part deformation risk.

Complete Forging & Inspection System

Hot forging, stress‑relieving, UT ultrasonic inspection, mechanical property test, spectral composition verification; full material traceability with official MTC documents.

One‑Stop Forging‑Machining Solution

From raw forging blanks to rough‑machined or fully‑finished components, reduce customers’ secondary‑processing workload.

Typical Applications

• Aerospace & Defense: Aircraft structural components, high‑strength fasteners, weapon‑system parts (compliant with AMS5604 / AMS5643 specification)
• Oil & Gas / Off‑shore Industry: Valve parts, drill‑equipment components, high‑pressure shaft blanks, offshore mechanical fittings
• Energy & Power Generation: Nuclear auxiliary equipment components, power‑plant high‑strength structural forgings
• Paper‑making Industry: Wear‑resistant mechanical shaft and equipment components
• Heavy‑Duty Machinery: Gear blanks, high‑strength connectors, bolts & nuts, measuring‑instrument parts
• Medical Equipment: High‑strength medical instrument forging blanks
• Chemical & Food‑processing: Equipment components under mild corrosive working‑conditions
• General Industry: Custom hubs, flanges, sleeves, cylinder forgings under medium‑corrosion working‑conditions

Processing Service

We provide integrated forging and precision machining services, and can produce finished components strictly according to customer drawings: Turning, milling, planing, drilling, boring, grinding Gear cutting, CNC precision machining Sizing cutting, surface treatment and finishing

We have supplied a wide range of forged and machined parts including shafts, cylinders, hollow bars, pistons, tube sheets, rings and disc bearings to customers worldwide.

Quality Assurance

We have a professional QC inspection team and complete testing equipment to ensure stable and reliable product quality: Ultrasonic testing (UT) for internal defects Tensile and hardness testing for mechanical properties High‑precision dimensional measurement Spectrometer for chemical composition verification Metallographic microstructure inspection

Every batch of products undergoes strict inspection before delivery to meet the quality requirements of various engineering projects.

Packing & Delivery

Packing

Inner packaging: waterproof polybag for moisture and dust protection Outer packaging: reinforced wooden case / wooden pallet, suitable for long‑distance international transportation Custom packaging solutions available upon request Extra protection: Separated cushioning; anti‑collision protection for large heavy forgings; clear heat‑number and part‑mark labels on each bundle / piece.

Lead Time

Normally 10 – 45 days after receipt of advance payment Exact delivery time depends on order quantity, specification complexity and machining requirements Standard 17‑4PH forging blanks: 15‑35 working‑day lead‑time.