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17-4PH Stainless Steel Bar - High Corrosion Resistance Aerospace Grade Seamless Round Bar

Basic Properties
Place of Origin: Other
Brand Name: Factory Direct Supply
Certification: ISO 9001
Model Number: 17-4PH
Trading Properties
Minimum Order Quantity: 1
Price: negotiable
Payment Terms: T/T
Supply Ability: Adequate production
Product Summary
17-4PH stainless steel bars offer high strength (1310MPa+), excellent corrosion resistance, and good machinability. ASTM standard, ISO 9001 certified, with custom sizes and processing services for aerospace and industrial applications.

Product Details

Highlight:

Precipitation Hardening Stainless Steel Bar

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Stainless Steel Bar 15-5PH

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Stainless Steel Bar 17-4PH

Product Name: 17-4PH Stainless Steel Bar
Standard: ASTM
Color: Silver
Shape: Round
Type: Seamless
Grade: Stainless Steel
Section Shape: Round
Advantage: High Corrosion Resistance
Product Description
Precipitation Hardening Stainless Steel Bar 15-5PH 17-4PH 17-7PH For Aerospace Field
Product Overview

17-4PH stainless steel bars, plates, round steel, and materials are supplied in pre-hardened state with factory hardness of approximately 37-40HBW.

Product Name 17-4PH Stainless Steel Bar Size Customized
Tolerance ±1% WT Customers' Request
Certification ISO 9001 Length Customers' Request
Keyword Stainless Steel Special Use Valve Steels
Standard ASTM Grade 410, 316Ti, 316L, 310S, 321, 430, 304, 304L
Welding Line Type Seamless Application Industry
Delivery Time 8 ~ 14 days Surface Annealing
Specifications Round Shape Round
Model Number 17-4PH Technique Cold Rolled Hot Rolled
Place of Origin Other Advantage High strength, good impact toughness and good overall and local stress corrosion resistance
Material Status Large stock or fast new production Package Standard Package
Processing Service Bending, Welding, Punching, Cutting Payment T/T30% Deposit+70% Advance
17-4PH Stainless Steel Bar product image
Product Description

17-4PH is the American ASTM standard grade. 17-4PH Stainless Steel Bar is a precipitation hardening martensitic stainless steel composed of copper, niobium and columbium. The steel has excellent compressive strength, excellent corrosion resistance, excellent machinability and high material hardness. The compressive strength of the steel can reach 1100-1300MPa. In addition, the corrosion resistance of the steel is comparable to 304 and 430 stainless steels.

Physical Properties
  • Melting temperature range: 1400-1440℃
  • Specific heat capacity: 502J/(kg/℃)
  • Density: 7.78kg/m³
  • Hardness: Available in various specifications
Welding Performance

17-4PH can be welded by any method in the solid solution, aging or over-aging state. No preheating is required before welding. If the weld strength is required to be close to the strength of the steel after aging hardening, it must be re-solidified and aged after welding. This steel is also suitable for brazing, and the best brazing temperature is the solid solution treatment temperature.

Heat Treatment Process

17-4PH solid solution temperature 1020-1060℃, aging temperature 480-620℃, 4h, with aging temperature depending on specific use requirements.

Performance Characteristics
  • High strength: After appropriate heat treatment, tensile strength can reach over 1310MPa
  • Good corrosion resistance: Comparable to 304 stainless steel in most media
  • Good machinability: Can be formed by various processing methods including cutting, forging, and welding
  • Welding performance: Good weldability with post-weld heat treatment required to restore properties
Application Areas
  • Aerospace field: Engine parts, aircraft rudders, aircraft chassis
  • Petrochemical industry: Pipes, valves, pump bodies
  • Medical device field: Various medical instruments and equipment
  • Marine engineering field: Offshore platforms and seawater-resistant equipment
  • Other fields: Papermaking, food processing, and general metal processing industries
Overall Rating
5.0
★★★★★
★★★★★
Based on 50 reviews recently
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All Reviews
  • D
    D*r
    Canada Aug 7.2026
    ★★★★★
    ★★★★★
    The Grade 630 stainless steel bars exceeded our expectations in both machining performance and mechanical properties. The precision tolerance was excellent, and every shipment arrived on schedule. We will continue working with this supplier.
  • R
    Robert Johnson
    United States Aug 2.2026
    ★★★★★
    ★★★★★
    We sourced ASTM A564 17-4PH stainless steel bars for aerospace components requiring high strength and excellent dimensional stability. The material quality was outstanding, with consistent hardness and complete mill test certificates. A highly dependable supplier.
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