17-4PH Forged Ring & Hollow Bar – ASTM A705 / A564 / AMS 5643 Certified
Product Details
| Grade: | 17-4PH UNS S17400 W.Nr. 1.4542 | Standard: | STM A705 / ASME SA-705 AMS 5643，ASTM A564 / ASME SA-564 |
|---|---|---|---|
| OD: | Ring O.D.: 100 – 3,000 Mm (custom)Hollow Bar O.D.: 6 – 600 Mm | Thickness: | Ring Thickness: 20 – 500 Mm，Hollow Bar Wall Thickness: 0.5 – 100 Mm |
| Height: | Per Drawing | Delivery Conditions: | Solution Annealed (Condition A) + Aged Per H900 / H1025 / H1075 / H1150 / H1150M Or As-forged Per Drawing |
Product Description
Product Highlights
- 17‑4PH (Type 630) copper‑niobium precipitation‑hardening martensitic stainless steel ring & hollow bar, UNS S17400 / W.Nr 1.4542, conforms to ASTM A705 forging and AMS 5643 industry‑aerospace specifications
- Cu‑Nb strengthened martensitic PH grade; multiple aging tempers H900 / H1025 / H1075 / H1150 / H1150M to balance strength, toughness and transverse impact performance
- Moderate corrosion resistance comparable to 304 stainless steel; good resistance to atmospheric, freshwater and mild‑chloride industrial environments, fully magnetic in final aged condition
- Minimal dimensional distortion during low‑temperature precipitation aging; ideal for precision ring‑hollow‑bar components requiring tight tolerances after heat‑treatment
- Supplied in solution‑annealed Condition A soft forging blank for full‑range CNC turning, boring, groove‑machining before aging heat‑treatment
- Custom OD, ID, wall‑thickness, height / length; full‑scope CNC processing strictly per customer CAD/PDF drawings
- Premium raw stock for valve‑body ring forgings, pump‑component hollow sleeves, high‑strength fastener preforms, offshore hardware and mechanical‑equipment wear‑ring blanks
Product Overview
This series of 17‑4PH rings and hollow bars are manufactured by hot forging / hot‑piercing extrusion, followed by solution annealing and air quenching to obtain homogeneous martensitic matrix microstructure. Standard delivery is solution‑annealed Condition‑A soft blank ready for rough‑and‑finish CNC machining. Target mechanical properties are achieved by subsequent low‑temperature single‑stage or double‑aging precipitation hardening heat‑treatment.
17‑4PH (UNS S17400 / 1.4542, also known as Type 630) is the most widely‑used copper‑niobium martensitic precipitation‑hardening stainless steel. Strength originates from Cu‑rich precipitates formed during aging treatment. It combines high tensile strength, hardness and acceptable corrosion performance. Multiple aging tempers can be selected: H900 for maximum hardness / wear‑resistance; H1150M double‑aging for optimized toughness and stress‑relief. Widely processed into seamless rolled rings, hollow‑bar sleeves, wear‑ring forgings, valve‑component preforms and high‑strength fastener blanks for oil‑gas, chemical‑processing, general‑mechanical‑equipment and aerospace industries.
Material Grade Characteristics – 17‑4PH (UNS S17400 / 1.4542 Type 630)
- Martensitic precipitation‑hardening stainless steel; strength developed by copper‑niobium precipitate phases after aging; non‑functional in as‑forged state
- Multiple standardized aging tempers (H900 / H1025 / H1075 / H1150 / H1150M) for flexible strength‑toughness tuning for ring‑hollow‑bar components
- Corrosion performance similar to 304 austenitic stainless steel; suitable for atmosphere, fresh‑water and mild‑chloride conditions; not for heavy‑acid severe‑corrosion service
- Very low part distortion upon aging heat‑treatment, great advantage for precision‑tolerance forged ring‑hollow‑bar parts
- Good machinability in Condition‑A solution‑annealed state; welding is possible, post‑weld full solution‑anneal plus aging is required to restore full mechanical‑properties
- Fully magnetic after aging; good wear‑resistance for rotating wear‑ring and bushing‑type hollow‑bar applications
Chemical Composition (Weight %)
| Grade | EN No. | C ≤ | Si ≤ | Mn ≤ | P ≤ | S ≤ | Cr | Ni | Cu | Nb+Ta | Fe |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 17‑4PH(Type630) | 1.4542 | 0.07 | 1.00 | 1.00 | 0.040 | 0.030 | 15.0‑17.5 | 3.0‑5.0 | 3.0‑5.0 | 0.15‑0.45 | Balance |
Mechanical Properties (ASTM A705 / AMS 5643 Heat‑Treatment States)
| Delivery State | Min Tensile MPa | Min Yield MPa | Min Elongation % | Hardness HB Reference |
|---|---|---|---|---|
| Condition A (Solution Annealed) | ≤1100 | ≤895 | ≥10 | ≤363 HB |
| H900 Aged (482 °C) | ≥1310 | ≥1170 | ≥10 | 388 HB / HRC40‑47 |
| H1025 Aged (552 °C) | ≥1205 | ≥1035 | ≥12 | 352 HB / HRC36‑43 |
| H1075 Aged (579 °C) | ≥1070 | ≥1000 | ≥13 | 331 HB / HRC33‑40 |
| H1150 Aged (621 °C) | ≥1000 | ≥860 | ≥16 | 302 HB / HRC30‑37 |
| H1150M Double‑Aged | ≥930 | ≥725 | ≥18 | 285 HB / HRC28‑34 |
Unified Base Delivery Standard: Hot Forged / Hot Pierced, Solution Annealed(Condition A), Air Quenched, Stress‑Relieved, Pickled
Related Material Grades
- PH Stainless Steel:17‑4PH,15‑5PH,17‑7PH
- Martensitic Stainless Steel: 410,420,431,440C
- Duplex / Super Duplex: 2205, S32750, S32760
- Super‑Austenitic: 904L, 254SMO
- Inconel Series: 600,601,625,718,X‑750
- Incoloy Series: 800H/800HT,825,925
- Hastelloy Series:C‑4,C22,C276,B3
- Heat‑Resistant Stainless:253MA,310S
- Alloy Steel:4140,F22,F91,A105
Key Advantages
Multiple standard aging tempers from H900 up to H1150M double‑aging; freely balance high‑hardness wear‑resistance versus impact‑toughness for ring‑hollow‑bar forgings according to component‑design‑requirements.
Low‑temperature precipitation aging produces very small dimensional shift; excellent choice for precision‑machined ring‑hollow‑bar parts that require tight tolerances after final heat‑treatment.
Delivers far higher strength than conventional austenitic stainless steel, with corrosion performance comparable to 304 for atmospheric and fresh‑water service scenarios.
High hardness after H900 / H1025 aging makes it well‑suited for wear‑rings, bushing hollow‑bar and high‑load ring‑shaped mechanical‑equipment parts.
Widely‑qualified material for valve, pump, mechanical‑transmission and general‑industrial forging‑component‑projects with abundant real‑world application data.
Typical Applications
- Oil‑Gas & Valve Industry: Forged valve‑body ring segments, downhole‑tool hollow‑bar sleeves, high‑strength fastener‑preform blanks
- Mechanical‑Equipment: Rotating wear‑ring forgings, bushing‑type hollow‑bar components, high‑load retaining‑ring preforms
- Chemical‑Processing Equipment: Mild‑corrosion pump‑component ring‑hollow‑bar blanks, agitator‑hardware forgings
- Aerospace & General‑High‑Strength Hardware: Structural‑ring forgings, high‑strength hollow‑bar pre‑forms for non‑severe‑corrosion service
- Fluid‑Handling Machinery: Pump‑housing ring‑shaped parts, sealing‑ring forgings for moderate‑corrosion industrial systems
Processing Service
We provide integrated hot‑forging / hot‑pierced hollow‑bar & seamless rolled‑ring production, full custom CNC machining per customer CAD/PDF drawings:
- Cut‑to‑length / ring‑height sizing, facing, centering, OD turning, ID boring, chamfering
- Precision threading, internal‑external groove‑machining, cylindrical grinding & surface polishing for ring‑hollow‑bar parts
- Custom multi‑temper aging heat‑treatment service: H900 / H1025 / H1075 / H1150 / H1150M
- Pickling, passivation anti‑corrosion surface finishing
We supply 17‑4PH ring forgings, hollow‑bar blanks and fully‑machined components for valve‑manufacturing, oil‑gas, mechanical‑equipment and global industrial clients.
Quality Assurance
- 100% UT ultrasonic + eddy‑current inspection for forging / piercing internal segregation, inclusion and surface crack defects
- Full‑batch tensile, yield, elongation & hardness mechanical‑property testing for each heat lot & aging temper
- Spectrometer full‑spectrum chemical‑composition verification per heat number (strictly check Cu‑Nb key precipitation‑forming elements)
- Metallographic martensitic‑matrix & copper‑rich precipitate microstructure inspection after aging heat‑treatment
- High‑precision micrometer & CMM inspection for OD, ID, wall‑thickness, height / length and dimensional‑tolerance control
Mill Test Certificate EN 10204 3.1 / 3.2 can be issued and delivered together with shipment documents before delivery.
Packing & Delivery
Packing ‑ Inner: Independent anti‑rust plastic sleeve + waterproof film full wrap for ring / hollow‑bar surface scratch protection ‑ Outer: Reinforced fumigated wooden pallet / wooden case with separation blocks to avoid collision & deformation ‑ Custom heavy‑duty export packaging for large‑diameter rings & heavy‑wall hollow bars available upon request
Lead Time
Normally 20‑60 working days after receiving advance payment. Exact lead time depends on ring / hollow‑bar dimension, wall‑thickness, order quantity and custom‑aging‑heat‑treatment / machining demands.
Request Custom Quotation
Please specify part type (ring / hollow bar), required aging temper(H900/H1025/H1075/H1150/H1150M), OD‑ID‑wall‑thickness dimension and engineering drawings. Our precipitation‑hardening‑stainless‑steel metallurgy team will provide competitive factory price within 24 hours. Free aging‑temper‑selection technical consultation for your ring‑hollow‑bar service‑conditions!
Product Highlights
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