ZYTC Alloy is an ISO 9001 and AS 9120B certified superalloy manufacturer and supplier, offering 1.4542 / 17-4 PH at factory-direct prices with full material traceability and fast global delivery. 1.4542 (UNS S17400 / 17-4PH) is a martensitic precipitation-hardening stainless steel with additions of copper (Cu), niobium (Nb), and tantalum (Ta). It combines high strength and hardness with moderate corrosion resistance. The grade is solution annealed at high temperature followed by quenching, then hardened by precipitation during aging. Its hardness can reach 43 HRC at the hardening peak of 480°C. Different heat treatment temperatures can optimize mechanical properties, with yield strength ranging from 1100 to 1300 MPa . The alloy is widely used in medical instruments, general mechanics, food industry, and automotive applications.
Product Forms & Availability – 1.4542 / 17-4 PH (UNS S17400)| Product Form | Availability |
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| Round Bar | In stock | | Flat Bar | In stock | | Sheet | In stock | | Plate | In stock | | Strip | In stock | | Forging Stock | Available |
For all stock availability, contact Sales.
Operating Conditions & Selection Criteria1.4542 / 17-4PH is specified when designers require a precipitation-hardening stainless steel with high strength, good corrosion resistance, and ease of fabrication across a wide range of applications. Service Temperature Range: Excellent properties from cryogenic temperatures up to 315°C (600°F); good oxidation resistance to 650°C (1200°F) Strengthening Mechanism: Age-hardened through precipitation of copper-rich phases and nanometric intermetallic precipitates (Ni₃Cu) Corrosion Resistance: Good resistance to atmospheric corrosion and mild chemical environments; comparable to 304 stainless; excellent resistance to stress corrosion cracking (SCC) when properly heat treated Fabrication: Good weldability; preheating and post-heating practices for standard hardenable stainless grades are not required Applications: Medical instruments, general mechanics, food industry, automotive, aerospace, oil & gas, nuclear, and marine industries
Chemical Composition | Chemical Composition (Weight %) | 1.4542 Specification |
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| Chromium (Cr) | 15.0 - 17.0 | | Nickel (Ni) | 3.0 - 5.0 | | Copper (Cu) | 3.0 - 5.0 | | Niobium (Nb) | 0.15 - 0.45 | | Carbon (C) | 0.07 max. | | Manganese (Mn) | 1.0 max. | | Silicon (Si) | 1.0 max. | | Phosphorus (P) | 0.040 max. | | Sulfur (S) | 0.030 max. | | Iron (Fe) | Balance |
| Physical Properties | Metric | Imperial |
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| Density | 7.78 - 7.81 g/cm³ | 0.281 - 0.282 lb/in³ | | Melting Point | 1400 - 1440°C | 2550 - 2625°F | | Modulus of Elasticity | 190 - 200 GPa | 27.6 - 29.0 × 10⁶ psi | | Thermal Conductivity | 16 - 18 W/m·K | 111 - 125 BTU·in/hr·ft²·°F | | Electrical Resistivity | 0.71 - 0.77 µΩ·m | 0.71 - 0.77 µΩ·m | | Coefficient of Expansion (20-100°C) | 10.8 µm/m·°C | 6.0 µin/in·°F |
Heat Treatment| Condition | Solution Treatment | Aging Treatment | Typical Tensile Strength |
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| Condition A | 1040°C, air cool or oil quench | — | 1100 MPa (max) | | H900 | 1040°C, air cool | 480°C × 1 hour, air cool | 1310 MPa (190 ksi) | | H925 | 1040°C, air cool | 595°C × 4 hours, air cool | 1240 MPa (180 ksi) | | H1025 | 1040°C, air cool | 550°C × 4 hours, air cool | 1070 MPa (155 ksi) | | H1075 | 1040°C, air cool | 580°C × 4 hours, air cool | 1000 MPa (145 ksi) | | H1100 | 1040°C, air cool | 593°C × 4 hours, air cool | 965 MPa (140 ksi) | | H1150 | 1040°C, air cool | 620°C × 4 hours, air cool | 930 MPa (135 ksi) | | H1150D (Double Aged) | 1040°C, air cool | 620°C × 4 hours + 620°C × 4 hours | 900 MPa (130 ksi) |
Mechanical Properties (Aged Conditions)| Condition | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Hardness (HRC) |
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| H900 | 1310 | 1270 | 10 | 40-45 | | H925 | 1240 | 1200 | 10 | 38-42 | | H1025 | 1070 | 1000 | 12 | 35-38 | | H1075 | 1000 | 860 | 13 | 32-36 | | H1100 | 965 | 795 | 14 | 30-34 | | H1150 | 930 | 725 | 16 | 28-32 |
Applications| Industry | Typical Applications |
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| Aerospace | Aircraft fittings, turbine blades, jet engine parts, fasteners | | Medical | Surgical instruments, orthopaedic devices, dental equipment | | Oil & Gas | Valve stems, pump shafts, wellhead components, offshore valve parts | | Nuclear | Reactor components, nuclear waste casks | | Food Processing | Processing equipment, cutting blades, slicers | | General Engineering | Gears, shafts, bushings, actuators, mixing screws, molds and dies | | Automotive | Engine components, suspension parts, high-strength fasteners |
Delivery Lead Times (after pre-payment confirmation)| Stock Status | Delivery Time |
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| Products in stock | Within 3 days | | Raw material in stock | Within 10 days | | Re-melting required | 15 – 25 days |
Contact UsRequest a quote for 1.4542 / 17-4 PH (UNS S17400) – Martensitic Precipitation Hardening Stainless Steel – High Strength & Hardness – Double Aged H1150D . Please provide: Diameter / size (round, flat, sheet, plate) Length or weight required Heat treatment condition (H1150D / H900 / H1025 / H1150, etc.) Quantity Destination port Any special certification requirements
📧 Email: daisy@zytcsteel.com
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