Product Overview40mm Base Valve Shocks Absorber Part With Steam Treatment and
density more than 6.5
This 40mm precision sintered base valve (foot valve) is engineered
from FC-0208 Fe-C-Cu powder metallurgy material with a guaranteed
density exceeding 6.5 g/cm³. Designed for automotive shock absorber
applications, it delivers strong hardness (65HB) and consistent
hydraulic damping performance. Steam-treated for enhanced surface
durability and corrosion resistance, this component is manufactured
by XIAYI under ISO 9001:2008 certified quality systems with
comprehensive testing capabilities including CMM, material
analysis, and durability validation.
With many years of working experience as industrial design and
quality engineers, XIAYI excels at Powder Metallurgy process,
casting, machining technology and quality management. We are also
familiar with TS16949 system and clean production. To fulfill OEM
outsourcing parts requirements from customers worldwide, we share
our professional technology and quality management experience — our
aim is to optimize customer design and reduce cost based on
different process technology.
Technical SpecificationsMaterial | Iron base steel |
Brass base steel |
According to customer drawing |
Surface Treatment | Sand Blasting |
Zinc/Chrome Plating |
Rust-preventive treatment (steaming treating) |
Painting |
Electrophoresis |
Powder Coating |
Key Parameters- Product Name: Foot Valve (Base Valve)
- Model Number: XYJD-PM1223-B
- Material Grade: FC-0208 (Fe-C-Cu)
- Valve Diameter: 40mm
- Sintered Density: >6.5 g/cm³
- Hardness: 65HB
- Press Machine: 80-150T
- Surface Treatment: Steam treatment (standard)
- Sample Time: 25 days
- Service: OEM / ODM
Material OptionsXIAYI offers a comprehensive range of powder metallurgy materials
to meet diverse application requirements:
- P/M Copper and Copper Alloys
- P/M Iron and Carbon Steel
- Iron and Carbon Steel
- Iron-Copper and Copper Steel
- Iron-Nickel and Nickel Steel Low Alloy Steel
- Commix Low Alloy Steel
- Sinter Hardened Steel
- Diffusion Alloyed Steel
- Copper Infiltrated Iron
Manufacturing ProcessEvery foot valve follows XIAYI's systematic production flow with
quality inspection at each stage:
- Material Receiving (IQC inspection)
- Powder Mixing — Precise blending of metal powders with lubricants
- Compacting — High-pressure forming on 80-150T presses
- Sintering — Controlled atmosphere furnace for metallurgical bonding
- Post Treatment — Steam treatment, sizing, deburring
- QC Inspection — Dimensional, density, and hardness verification
- Package and Delivery — Protective packaging for safe transit
Much of our modern day equipment is carried out by computer
numerical control (CNC), in which computers are used to control the
movement and operation of mills, lathes, and other cutting machines
— ensuring consistent precision across every production batch.
Measuring & Testing Equipment- Carbon sulfur determinator — Material chemistry verification
- Metallurgic microscope — Grain structure and porosity analysis
- Hydraulic universal material tester — Mechanical strength
validation
- Hardness testers — Rockwell/Brinell hardness verification
- Pneumatic measuring instrument — Non-contact precision measurement
- Measuring projector — Optical profile inspection
- Gear testing instrument — Gear geometry verification
- Electrical profilometer — Surface roughness analysis
- CMM (Coordinate Measuring Machine) — 3D dimensional accuracy
Product DescriptionSinter foot valve, strong hardness 65HB Fe-C-Cu material used in
car shock absorbers. XIA YI produces different kinds of powder
metal parts. They can be used in different areas such as
automobile, motorcycle and various industries.
Sintered Parts Capabilities:
- Powder Metallurgy, oil impregnated for self-lubrication
- Iron, copper, iron copper, bronze material options
- Professional Fe/Cu based powder metallurgy parts manufacturer
- Complete process flow: Material → IQC → Mixing → Compacting →
Sintering → Post Treatment → QC → Package and Delivery
ApplicationsXIAYI powder metallurgy components serve a wide range of industries
worldwide:
- Automotive Shock absorber parts, transmission gear, structural components
- Motorcycle Suspension parts, engine components, brake system parts
- Power Transmission Spur gear, bevel gear, helical gear, timing pulley, rotor and
stator
- Bearings & Bushings Sintered bronze bearing, copper sleeve, sleeve bearing, bushing,
bush, pulley
- Agricultural Machinery Durable wear-resistant components for heavy-duty equipment
Competitive AdvantageAdvanced Testing & Validation: XIAYI's comprehensive testing laboratory features specialized
equipment for complete product validation — ensuring every
component meets your performance requirements before shipment.
Testing Equipment | High-low temperature equipment |
Vibration test stand |
Durability test |
Performance simulation test bench |
X-ray material testing equipment |
Hardness testing |
Roughness testing |
Other special customized testing equipment for powder metallurgy
parts |
Our integrated approach combines industrial design expertise,
quality engineering management, and ISO 9001:2008 certified
processes to deliver components that optimize your designs and
reduce total costs.
Frequently Asked QuestionsWhat is a 40mm base valve and what is its function in a shock
absorber?
The 40mm base valve (also called foot valve) is a critical
component located at the bottom of the shock absorber's inner
working cylinder. With a 40mm diameter, it precisely regulates
hydraulic oil flow between the reservoir and compression chamber.
During compression, it controls oil passage to generate consistent
damping force, directly influencing vehicle handling stability and
ride comfort. The 40mm size is a common standard used in passenger
car and light truck shock absorbers.
What materials are available and which is recommended?
We offer 9 material options: P/M Copper and Copper Alloys, P/M Iron
and Carbon Steel, Iron and Carbon Steel, Iron-Copper and Copper
Steel, Iron-Nickel and Nickel Steel Low Alloy Steel, Commix Low
Alloy Steel, Sinter Hardened Steel, Diffusion Alloyed Steel, and
Copper Infiltrated Iron. Our standard recommendation is FC-0208
(Fe-C-Cu), which provides 65HB hardness with density exceeding 6.5
g/cm³ — an optimal balance of strength, wear resistance, and cost
for automotive shock absorber applications.
What quality certifications does XIAYI hold?
XIAYI is ISO 9001:2008 certified with extensive familiarity with
TS16949 (now IATF 16949) quality management systems. Our quality
control process spans incoming material inspection (IQC),
in-process monitoring, and final QC. Our testing laboratory
features 9 categories of precision instruments including CMM,
carbon sulfur determinator, metallurgic microscope, universal
material tester, and specialized durability/vibration test stands
for complete product validation.
What is the minimum order quantity (MOQ)?
The standard MOQ is 1,023 pieces. Sample development time is
approximately 25 days for custom designs, with delivery time of
around 30 working days for new sample orders after technical
details are confirmed. Our monthly supply capacity is 50,000
pieces.
What surface treatments are available and which is best for shock
absorber valves?
Six surface treatments are available: sand blasting, zinc/chrome
plating, rust-preventive steam treatment, painting,
electrophoresis, and powder coating. For shock absorber base
valves, steam treatment is the recommended standard. It creates a
durable magnetite (Fe₃O₄) surface layer through controlled
oxidation, which enhances surface hardness, improves wear
resistance, provides corrosion protection, and has the advantage of
no dimensional change — critical for precision-fit components.
Can XIAYI customize the base valve to our specifications?
Yes. XIAYI provides full OEM and ODM services. We can produce base
valves according to your drawings or samples with our experienced
industrial design and quality engineering team. Our aim is to
optimize your design and reduce costs based on our cross-process
technology expertise — covering powder metallurgy, casting, and CNC
machining. We will review your requirements and provide material
recommendations, process optimization suggestions, and a sample
timeline.
What testing and validation does each product undergo?
We operate a comprehensive testing facility with high-low
temperature chambers, vibration test stands, durability test rigs,
performance simulation test benches, X-ray material testing,
hardness and roughness measurement, and specialized customized
testing equipment for powder metallurgy parts. Combined with 9
categories of precision measurement instruments, every production
batch is validated for material chemistry, mechanical properties,
dimensional accuracy, and functional performance before shipment.
What is the typical delivery time for bulk production orders?
For ongoing production orders, delivery is typically within 30
working days. For new custom designs, sample development takes
approximately 25 days with subsequent production delivery of 30
working days after sample approval. Packaging uses individual
plastic box protection within cartons with standard export
packaging to ensure safe international transit.
What are the advantages of powder metallurgy compared to
traditional machining?
Powder metallurgy offers several advantages for shock absorber
components: (1) Near-net-shape production minimizes material waste
and secondary machining; (2) Controlled porosity enables oil
impregnation for self-lubrication; (3) Consistent density and
hardness distribution throughout the component; (4) High-volume
cost efficiency — our 80-150T presses produce 50,000+ pieces
monthly; (5) Excellent repeatability with tight tolerances
maintained across production batches; (6) Ability to create complex
geometries with integrated features that traditional machining
cannot achieve cost-effectively.
What payment terms do you accept and where do you export?
We accept T/T (Telegraphic Transfer) and . Pricing is negotiable
based on order quantity and specifications. XIAYI exports powder
metallurgy components to customers worldwide, with established
supply relationships across Asia, America, and other international
markets. All products are shipped in standard export packaging with
individual product protection for secure delivery.