17-4 PH Stainless H900
VerifiedmetalUNS S17400· AISI 630· 17-4PH· 630 SS
17-4 PH is a precipitation-hardening martensitic stainless steel that combines high strength with corrosion resistance through controlled heat treatment (H900 condition represents the fully hardened state). It is widely used in aerospace, defense, and oil & gas industries where components must withstand demanding mechanical loads in corrosive or marine environments while maintaining dimensional stability. Engineers select 17-4 PH when they need a good balance of strength, toughness, and corrosion resistance in fasteners, pump shafts, valve bodies, and structural components—offering superior performance to standard austenitic stainless steels in applications requiring higher hardness and fatigue resistance.
aerospace fasteners and fittingspump shafts and impellersvalve bodies and actuatorsmarine hardwareoil & gas downhole toolsprecision instrument components
Compliance & Regulations
?Conflict Free?RoHS?REACH?TSCA?Prop 65
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Fracture Toughness(KIC) | — | ksi·√in | — | — | |
Hardness (Vickers)(HV) | — | HV | — | — | |
Poisson's Ratio(ν) | — | - | — | — | |
Yield Strength (0.2% offset)(σy) | — | ksi | H900 | — | |
Young's Modulus(E) | — | ksi | — | — |
Verified Unverified Low confidence (<80%) Link to source
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Thermal Conductivity(k) | — | BTU/(hr·ft·°F) | — | — |
Verified Unverified Low confidence (<80%) Link to source
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Density(ρ) | — | lb/in³ | — | — |
Verified Unverified Low confidence (<80%) Link to source
Regulatory Screening
Environmental
Quality & Standards
Industry-Specific
RoHS, REACH, and Prop 65 statuses are validated against official substance lists (ECHA SVHC Candidate List, OEHHA Prop 65, RoHS Annex II). Other regulations are estimated from composition and material classification. All screening is a starting point for due diligence — always verify with your supplier before making compliance decisions.