ASTM A705 Gr 630 17-4pH Forgings Manufacturer
We are professional ASTM A705 Grade 630 17-4ph Forged Forging Turbine Impeller stop rings.
We could make forged rings with diamter from 80MM to 6000MM, with weight from 10KGS to 15000KGS
Manufactured in full compliance with ASTM A705/A705M standards, our 17-4PH forgings are widely used in aerospace, marine, chemical processing, and power generation industries.
- Standard: ASTM A705 – Specification for precipitation-hardening stainless steel forgings
- Grade: 630 (17-4PH) – Most commonly used PH stainless
- UNS: S17400
- Heat Treatment: Typically H900 to H1150 (H900 = high strength)
- Condition Supplied: Solution-treated and age-hardened
What is ASTM A705 Gr. 630 / 17-4PH?
ASTM A705 Grade 630 refers to precipitation-hardening stainless steel known as 17-4PH (17% Chromium, 4% Nickel). It is heat-treatable and delivers high mechanical strength and corrosion resistance, making it ideal for critical components in high-stress applications.
Composition of Grade 630 according ASTM A705
S17400 Mechanical Property of Solution Heat treatment
S17400 Mechanical Property after age hardening heat treatment
Properties of grade 630 forging
- ✔ High strength (even at elevated temperatures)
- ✔ Excellent corrosion resistance (better than 410 / 420 series)
- ✔ Good toughness
- ✔ Dimensional stability during heat treatment
- ✔ Machinable and weldable with some precautions
Typical Forged Products of S17400
- Flanges
- Valve bodies
- Pump shafts
- Turbine parts
- Aerospace structural components
- Diameter: up to 1200 mm
- Weight: up to 2000 kg per piece
- Heat treatment: H900, H1025, H1150, double H1150, and solution-annealed (Condition A)
Testing & Documentation:
EN 10204 3.1 / 3.2 certification upon request
Ultrasonic testing (UT)
Mechanical properties (tensile, hardness, impact)
Chemical composition
Heat treatment records
Example Purchase Description
Material: ASTM A705 Grade 630 (17-4PH), Forged
Condition: H1025 (Aged)
Size: Ø120 mm x 800 mm shaft
Test: Ultrasonic + Hardness + Tensile + Chemical
Cert: EN 10204 3.1 or 3.2
