High Hardness 17-4PH Stainless Steel Tubes for Aerospace and
Industrial Alloy 630 SS Pipe
Products Specification
| Products Name | Stainless Steel Seamless Pipe |
Grade: | 304 304L 309S 310S 314 316L 316Ti 321 329 347H 410 2205 2507 904L
254SMO 17-4PH and equal grade in GB JIS EN DIN Standard |
| Standards: | ASTM A213M-94b ASTM A249M-94a ASTM A269-94a
ASTM A312M-94b,ect. |
| DIN 17456-85 DIN 17458-85 DIN 17459-92.ect |
| JIS G3446-1994 JIS G3448-1997 JIS G3459-1997 JIS G3463-1994,ect. |
| GB13296-1991 GB14975-2002 GB14976-2002,ect. |
| Size: | ND5 - DN400 |
| Length: | 6m length or cutting any length as request |
| Applications: | fluid and gas transport, structure , boiler, heat exchanger, super
heater |
1. Introduction of 17-4PH Stainless Steel Pipes
The 17 - 4PH stainless steel tube is a precipitation - hardening
stainless steel product renowned for its exceptional combination of
high strength, good corrosion resistance, and excellent mechanical
properties. This type of stainless steel tube is widely used in
various industries due to its outstanding performance and
reliability
2. Chemical Composition of 17-4PH Stainless Steel Pipes
The key chemical elements of 17 - 4PH stainless steel tube are as
follows:
- Chromium (Cr): Approximately 15 - 17.5%. Chromium is a crucial
element that provides excellent corrosion resistance to the steel
tube, forming a passive oxide film on the surface to protect it
from environmental factors such as moisture and chemicals.
- Nickel (Ni): Around 3 - 5%. Nickel enhances the toughness and
ductility of the tube, improving its ability to withstand
deformation without cracking.
- Copper (Cu): About 3 - 5%. Copper contributes to the precipitation
- hardening process, increasing the strength and hardness of the
stainless steel tube.
- Molybdenum (Mo): Up to 0.75%. Molybdenum further improves the
corrosion resistance, especially in reducing - acid environments,
and also enhances the strength of the material.
- Carbon (C): ≤0.07%. The low carbon content helps maintain good
weldability and reduces the risk of carbide precipitation, which
could otherwise affect the corrosion resistance.
3. Mechanical Properties of 17-4PH Stainless Steel Pipes
- Tensile Strength: Depending on the heat treatment condition, it can
range from 100 ksi (690 MPa) in the annealed state to over 170 ksi
(1170 MPa) in the fully hardened and aged condition. This wide
range of tensile strength makes it suitable for applications with
different load - bearing requirements.
- Yield Strength: In the annealed state, it is typically around 50
ksi (345 MPa), and in the fully aged condition, it can reach up to
150 ksi (1035 MPa). The high yield strength ensures that the tube
can resist permanent deformation under stress.
- Elongation: Usually ≥4% in the fully aged condition and ≥20% in the
annealed condition. This indicates good formability in the annealed
state and acceptable ductility even after hardening, allowing for
various manufacturing processes such as bending and flaring.
- Hardness: It can achieve a Rockwell hardness of up to HRC 44 - 48
after proper heat treatment, providing excellent wear resistance.
4. Advantages of 17-4PH Stainless Steel Pipes
- Superior Corrosion Resistance: The 17 - 4PH stainless steel tube
shows excellent resistance to a variety of corrosive media,
including atmospheric corrosion, mild chemical solutions, and some
chloride - containing environments. This makes it ideal for
applications in coastal areas, chemical processing plants, and food
processing industries.
- High Strength - to - Weight Ratio: Compared to many other
materials, it offers high strength while maintaining a relatively
low weight. This characteristic is highly beneficial in aerospace,
automotive, and structural engineering applications where weight
reduction without sacrificing strength is crucial.
- Good Heat Resistance: It can maintain its mechanical properties at
elevated temperatures, making it suitable for applications
involving moderate - temperature service, such as exhaust systems
in vehicles and heat - exchanger components.
- Excellent Machinability and Weldability: Despite its high strength,
17 - 4PH stainless steel tube can be machined using standard metal
- working techniques with appropriate tooling and machining
parameters. It also has good weldability, allowing for easy
fabrication into various complex structures.
5. Applications of 17-4PH Stainless Steel Pipes
- Aerospace Industry: Used for components such as landing gear parts,
structural members, and engine components due to its high strength,
low weight, and corrosion resistance, which are essential
requirements in aerospace applications.
- Marine Applications: In the marine environment, where corrosion is
a major concern, 17 - 4PH stainless steel tubes are employed for
shipbuilding, offshore platforms, and marine hardware, ensuring
long - term durability and reliability.
- Chemical and Petrochemical Industries: It is suitable for use in
pipelines, valves, and fittings in chemical processing plants and
refineries, as it can withstand the corrosive effects of various
chemicals and harsh operating conditions.
- Medical Equipment: Due to its biocompatibility and excellent
corrosion resistance, 17 - 4PH stainless steel tube is used in the
manufacturing of surgical instruments, orthopedic implants, and
other medical devices.
- General Engineering and Structural Applications: Widely used in
architectural structures, bridges, and mechanical components where
high strength, corrosion resistance, and good formability are
required.
6. Standards and Specifications
Our 17 - 4PH stainless steel tubes comply with international
standards such as ASTM A564/A564M and AMS 5643. These standards
ensure consistent quality, chemical composition, and mechanical
properties, meeting the strict requirements of different industries
and applications.
In conclusion, the 17 - 4PH stainless steel tube is a high -
performance material that offers a perfect balance of strength,
corrosion resistance, and other desirable properties, making it an
excellent choice for a wide range of industrial and commercial
applications.
ASTM A312 309S SS Pipe DIN 1.4833 Seamless Stainless Steel Round Pipe
