Table of Contents
- 17-4PH Stainless Steel Round Bars Overview
- Technical Specifications
- Mechanical Properties & Chemical Composition
- Types of 17-4PH Stainless Steel Round Bars
- Key Advantages of UNS S17400 Round Bars
- Key Applications of 17-4PH SS Round Bars
- Quality Testing & Inspection
- Global Export Markets
- Frequently Asked Questions
- Contact Aurum Overseas
17-4PH Stainless Steel Round Bars Supplier & Exporter
Aurum Overseas is a leading 17-4PH Stainless Steel Round Bars Supplier offering ready-to-ship UNS S17400 Round Bars engineered for high-load reliability. Our 17-4PH SS Round Bars eliminate component failure under heavy stress—reducing downtime and extending service life in critical industrial machinery.
As a trusted 17-4PH Stainless Steel Round Bars Exporter, we stock certified ASTM A564 UNS S17400 Round Bars with EN 10204 3.1 Mill Test Certificates. Our stock includes centerless ground 17-4PH Bright Bars, heavy open-die 17-4PH Forged Bars, and custom cut-to-length options across all heat-treated conditions (Condition A, H900, H1025, H1075, H1150).
We deliver high-grade 17-4PH SS Round Bars worldwide with rapid dispatch to major industrial hubs across North America, Europe, the Middle East, and Asia-Pacific, including the USA, Germany, UAE, Saudi Arabia, Singapore, and Australia.
Technical Specifications
| Technical Parameter | Stainless Steel 17-4PH (UNS S17400) |
|---|---|
| Material Designation | 17-4PH / AISI 630 / UNS S17400 / Werkstoff 1.4542 |
| UNS Number | UNS S17400 |
| Werkstoff Number | 1.4542 |
| Manufacturing Standards | ASTM A564, AMS 5643, ASME SA564 |
| Diameter Capability | 3 mm to 500 mm (1/8" to 20" NB) |
| Length Specifications | 3 Meters, 6 Meters, Cut-to-Length |
| Dimensional Tolerances | ISO h8, h9, h10, h11, DIN 1013 |
| Delivery Conditions | Solution Treated (Condition A) or Aged (H900, H1025, H1075, H1150, H1150-M, H1150-D) |
Mechanical Properties & Chemical Composition
Equivalent Grades of 17-4PH Round Bars
| Standard | Werkstoff Nr. | UNS | EN Standard |
|---|---|---|---|
| SS 17-4PH | 1.4542 | S17400 | X5CrNiCuNb16-4 |
Chemical Composition of 17-4PH Round Bars
| Chemical Element | Composition Range (%) |
|---|---|
| Chromium (Cr) | 15.00 – 17.50 |
| Nickel (Ni) | 3.00 – 5.00 |
| Copper (Cu) | 3.00 – 5.00 |
| Niobium (plus Tantalum) | 0.15 – 0.45 |
| Manganese (Mn) | 1.00 max |
| Silicon (Si) | 1.00 max |
| Carbon (C) | 0.07 max |
| Phosphorus (P) | 0.04 max |
| Sulfur (S) | 0.03 max |
| Iron (Fe) | Balance |
Mechanical Properties of SS 17-4 PH Round Bars
| Condition | Ultimate Tensile Strength (PSI) | Yield Strength 0.2% (PSI) | Elongation (%) | Hardness (Rockwell C) |
|---|---|---|---|---|
| H900 (Peak Hardness) | 190,000 | 170,000 | 10 | C40 |
| H1025 | 155,000 | 145,000 | 12 | C35 |
| H1075 | 145,000 | 125,000 | 13 | C32 |
| H1150 | 135,000 | 105,000 | 16 | C28 |
| H1150-M | 115,000 | 75,000 | 18 | C24 |
| H1150-D | 125,000 | 105,000 | 16 | C24–C33 |
Types of 17-4PH Stainless Steel Round Bars
Aurum Overseas supplies ASTM A564 UNS S17400 Round Bars in precision bright and heavy forged conditions for aerospace and valve service.
17-4PH Bright Bars
17-4PH Forged Bars
Key Advantages of UNS S17400 Round Bars
3x the Strength of 304
Reaches ultra-high tensile strength up to 190,000 PSI via simple low-temperature heat treatment (Condition H900) to handle extreme mechanical loads.
304-Level Corrosion Resistance
Delivers robust protection against atmospheric exposure and mild chemicals, matching standard 304 stainless steel with vastly higher load capacity.
Zero Scaling or Distortion
Single-step thermal aging at low temperatures (480°C–620°C) prevents post-treatment warping, ensuring strict dimensional precision.
Easy Machinability
Easily machined in the soft solution-annealed state (Condition A) before final hardening, saving tooling wear and production time.
Key Applications of 17-4PH SS Round Bars
| Industry Sector | Typical Components | Operating Conditions |
|---|---|---|
| Pump & Valve Manufacturing | High-pressure pump shafts, valve stems, and impellers | High dynamic torque, fluid erosion, and continuous mechanical wear |
| Aerospace & Defense | Structural fasteners, landing gear pins, and actuator rods | High strength-to-weight ratios, cyclical fatigue, and flight stresses |
| Chemical Processing | Agitator shafts, reactor components, and mixer stems | Mild acidic exposure, elevated temperatures, and mechanical shock |
| Paper & Pulp Mills | Processing equipment shafts, cutter blades, and rolls | High moisture, mild chemical fluids, and severe mechanical loads |
| Energy & Power Generation | Turbine blades, nuclear reactor rod couplings, and drive shafts | High rotational speeds, thermal cycling, and high-tensile fatigue |
Quality Testing & Inspection
Every shipment of 17-4PH SS Round Bars supplied by Aurum Overseas undergoes strict quality verification:
- Positive Material Identification (PMI): XRF analysis verifies precise chemical balance, including chromium (15.0–17.5%), nickel (3.0–5.0%), and copper (3.0–5.0%).
- Mechanical Strength Verification: Hardness and tensile testing ensure full compliance with target heat-treatment conditions (Condition A, H900, H1025, H1150).
- Hardness Profile Testing: Rockwell C and Brinell hardness testing confirm uniform precipitation hardening across the bar cross-section.
- Ultrasonic Examination: Volumetric ultrasonic scanning per ASTM A388 verifies complete internal soundness free from forging cracks or inclusions.
Global Export Markets
As an established 17-4PH Stainless Steel Round Bars Exporter, Aurum Overseas supplies fully certified UNS S17400 Round Bars to global energy and aerospace engineering centers:
USA
Canada
Mexico
Germany
United
Kingdom
France
Italy
Netherlands
Belgium
Spain
Poland
UAE
Saudi
Arabia
Qatar
Kuwait
Oman
Bahrain
Frequently Asked Questions
17-4PH can be age-hardened to achieve tensile strengths up to 190,000 PSI—nearly three times that of standard 304 stainless steel—while maintaining comparable corrosion resistance in mild environments.
We stock 17-4PH round bars in Solution Annealed Condition A, as well as age-hardened conditions including H900, H1025, H1075, H1150, H1150-M, and H1150-D.
Yes. 17-4PH is easily machined in Solution Annealed Condition A and can then be age-hardened via a single low-temperature heat treatment without dimensional distortion.
We stock diameters from 3 mm to 500 mm in centerless ground bright finishes and hot-forged conditions, available in standard lengths or custom cut-to-size options.
Yes. Every order ships with complete EN 10204 3.1 Mill Test Certificates detailing heat chemistry, mechanical properties, and heat treatment compliance.
Contact Aurum Overseas
Aurum Overseas provides fully certified 17-4PH Stainless Steel Round Bars engineered for high-strength machinery and structural components.
Contact our technical sales team for stock availability, cut-to-size pricing, or instant quotes: