17-4 PH Round Bar Supplier for High Strength Industrial Components
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17-4 PH Round Bar Supplier is a high-intent industrial search used when engineers and procurement teams need a stainless-steel material that can combine high strength with useful corrosion resistance.
17-4 PH is a precipitation-hardening stainless steel commonly identified as:
UNS S17400
It is also widely known as:
AISI 630
The material is different from conventional stainless-steel grades because its mechanical strength can be significantly increased through controlled heat treatment.
This makes 17-4 PH particularly relevant to components where a combination of:
- High strength
- Corrosion resistance
- Hardness
- Dimensional stability
- Machinability
- Industrial durability
is required.
17-4 PH Round Bar is therefore used as raw material for components such as:
- Shafts
- Pins
- Valve components
- Pump components
- Fasteners
- Bushings
- Gears
- Aerospace hardware
- Marine components
- Precision machined parts
For a buyer, however, simply asking for “17-4 PH” is often not enough.
The condition of the material can have a major effect on its final properties.
Table of Contents
- What is 17-4 PH Round Bar?
- Why is 17-4 PH used in industry?
- What is UNS S17400?
- What is AISI 630?
- 17-4 PH material specifications
- 17-4 PH chemical composition
- 17-4 PH mechanical properties
- 17-4 PH tensile strength
- 17-4 PH yield strength
- 17-4 PH hardness
- 17-4 PH corrosion resistance
- What does PH mean in 17-4 PH?
- 17-4 PH precipitation hardening
- 17-4 PH H900
- 17-4 PH H1025
- 17-4 PH H1150
- 17-4 PH heat treatment
- 17-4 PH Round Bar specifications
- 17-4 PH Round Bar sizes
- 17-4 PH applications
- 17-4 PH shafts
- 17-4 PH valve and pump components
- 17-4 PH fasteners
- 17-4 PH aerospace applications
- 17-4 PH marine and oil & gas applications
- 17-4 PH machining
- 17-4 PH welding
- 17-4 PH testing and certification
- 17-4 PH Round Bar price
- How to buy 17-4 PH Round Bar
- 17-4 PH Round Bar Supplier in Mumbai
- Frequently asked questions
- Request a quotation
- Conclusion
What is 17-4 PH Round Bar?
17-4 PH Round Bar is a round-section stainless-steel product manufactured from 17-4 precipitation-hardening stainless steel.
The name itself gives a useful indication of its alloy chemistry:
- Approximately 17% chromium
- Approximately 4% nickel
The alloy also contains copper and other controlled elements that contribute to its precipitation-hardening capability.
The material is designed to provide a combination of:
corrosion resistance + high strength + hardness + toughness.
Round bar is commonly used as a starting material for machining industrial components.
Why is 17-4 PH Used in Industry?
Consider a shaft operating inside an industrial machine.
It may need to handle:
- Mechanical loads
- Repeated rotation
- Moisture
- Process fluids
- Wear
- Temperature changes
A conventional carbon steel may provide strength but require corrosion protection.
A conventional austenitic stainless steel may provide corrosion resistance but may not achieve the required strength.
17-4 PH is often considered when engineers want a middle ground between these requirements.
Its precipitation-hardening capability allows the material to reach significantly higher strength than many standard stainless-steel grades.
What is UNS S17400?
The commonly used UNS designation for 17-4 PH stainless steel is:
UNS S17400
When searching for material, buyers may encounter:
- 17-4 PH
- 17-4PH
- UNS S17400
- AISI 630
- Stainless Steel 630
- Grade 630
These names are frequently used to describe the same basic alloy family.
For procurement, it is still advisable to state the UNS number and applicable specification.
What is AISI 630?
17-4 PH is commonly designated as:
AISI 630
This designation is frequently used by manufacturers, stockists and engineering companies.
Therefore, Google searches such as:
“AISI 630 Round Bar Supplier”
and
“17-4 PH Round Bar Supplier”
can refer to the same material family.
Including both terms naturally within your product page helps the page address different ways industrial buyers search for the material.
17-4 PH Material Specifications
17-4 PH is covered by several specifications depending on the product form and application.
Commonly encountered specifications include:
- ASTM A564
- ASTM A693
- AMS 5643
- Other customer-specific specifications
The exact standard should be confirmed according to the required product.
For example, ASTM A564 covers hot-rolled and cold-finished age-hardening stainless-steel bars and shapes.
For standards information, buyers can consult ASTM International.
17-4 PH Chemical Composition
17-4 PH is based primarily on:
| Element | General Function |
|---|---|
| Chromium | Corrosion resistance |
| Nickel | Toughness and metallurgical balance |
| Copper | Precipitation strengthening |
| Manganese | Controlled alloying element |
| Silicon | Controlled alloying element |
| Carbon | Controlled to specification |
| Niobium/Columbium | Microstructural control |
The actual chemical limits must be checked against the applicable specification.
For industrial procurement, the material chemistry should be verified through the Material Test Certificate.
17-4 PH Mechanical Properties
One of the biggest advantages of 17-4 PH is its ability to develop different mechanical-property levels through heat treatment.
Depending on the condition, the material can offer:
- High tensile strength
- High yield strength
- High hardness
- Useful ductility
- Good toughness
This flexibility is one reason 17-4 PH is widely used in engineering components.
However, the phrase “17-4 PH” alone does not define the final mechanical properties.
The condition must also be specified.
17-4 PH Tensile Strength
17-4 PH can achieve high tensile strength after appropriate precipitation-hardening treatment.
Different aging conditions produce different combinations of:
strength ↔ hardness ↔ ductility ↔ toughness.
For example, an H900 condition is generally selected when high strength and hardness are priorities.
Other conditions can provide a different balance.
The required tensile strength should therefore be connected to the specified heat-treatment condition.
17-4 PH Yield Strength
High yield strength is one of the major reasons engineers select 17-4 PH.
It can be useful for:
- High-load shafts
- Fasteners
- Valve components
- Pump components
- Mechanical parts
- Aerospace hardware
When requesting a quotation, buyers should specify the required condition rather than simply writing:
“17-4 PH Round Bar.”
17-4 PH Hardness
17-4 PH hardness depends strongly on its aging condition.
Common conditions include:
- H900
- H925
- H1025
- H1075
- H1150
Each condition changes the relationship between strength, hardness and toughness.
For this reason, a buyer should state the required condition whenever hardness is important.
What Does PH Mean in 17-4 PH?
PH means precipitation hardening.
The alloy is strengthened through a controlled heat-treatment process.
The general concept is:
solution treatment → cooling → aging → strengthening
During aging, fine precipitates form within the metal’s microstructure.
These particles resist deformation and increase the material’s strength.
This is fundamentally different from simply increasing strength through conventional cold working.
17-4 PH Precipitation Hardening
Precipitation hardening is the feature that makes 17-4 PH particularly useful.
The material can be supplied in a solution-treated condition and subsequently aged to achieve the desired mechanical properties.
Different aging temperatures produce different performance characteristics.
That gives engineers more flexibility when choosing between:
- Maximum strength
- Better toughness
- Higher ductility
- Improved stress-corrosion performance
The final choice depends on the component and operating environment.
17-4 PH H900
H900 is one of the most commonly discussed 17-4 PH conditions.
The material is aged at approximately 900°F after solution treatment.
H900 is generally associated with:
- High strength
- High hardness
- High tensile properties
It is therefore attractive for components where maximum mechanical strength is important.
However, other aging conditions may provide better toughness or corrosion performance for specific applications.
17-4 PH H1025
H1025 involves aging at approximately 1025°F.
Compared with H900, this condition provides a different balance of:
- Strength
- Hardness
- Toughness
- Ductility
The exact properties depend on the applicable specification and processing history.
H1025 can be considered where an intermediate combination of properties is required.
17-4 PH H1150
H1150 is another commonly requested aging condition.
It involves aging at approximately 1150°F.
Compared with H900, H1150 generally provides:
- Lower strength
- Lower hardness
- Greater toughness
- Different ductility characteristics
This can make it attractive for applications where toughness is more important than maximum strength.
17-4 PH Heat Treatment
Heat treatment is central to 17-4 PH.
A simplified sequence is:
Step 1 — Solution Treatment
The alloy is heated to the specified solution-treatment temperature.
Step 2 — Cooling
The material is cooled according to the applicable procedure.
Step 3 — Aging
The material is reheated to the required aging temperature.
Step 4 — Cooling
The component is cooled to complete the treatment.
The actual temperatures and holding times should be taken from the governing specification or approved heat-treatment procedure.
17-4 PH Round Bar Specifications
A typical industrial purchase enquiry may contain:
| Requirement | Example |
|---|---|
| Grade | 17-4 PH |
| UNS | S17400 |
| AISI | 630 |
| Specification | ASTM A564 |
| Condition | H900 |
| Diameter | 50 mm |
| Length | 3000 mm |
| Finish | Bright / Ground |
| Quantity | 200 kg |
| Testing | Required |
| Certificate | EN 10204 3.1 |
This is much more useful to a supplier than simply writing:
“Need 17-4 PH.”
17-4 PH Round Bar Sizes
17-4 PH Round Bar is used in many different component sizes.
A buyer may require:
- 10 mm
- 20 mm
- 25 mm
- 40 mm
- 50 mm
- 75 mm
- 100 mm
- Larger custom sizes
The actual available range depends on the manufacturing route and supplier stock.
Specify:
diameter + length + condition + quantity + finish.
For precision-machined parts, dimensional tolerance should also be included.
17-4 PH Applications
17-4 PH is used across several industrial sectors.
Typical applications include:
- Shafts
- Valve components
- Pump components
- Fasteners
- Gears
- Bushings
- Pins
- Aerospace components
- Marine equipment
- Chemical-processing equipment
- High-strength mechanical components
Its usefulness comes from its combination of strength and corrosion resistance.
17-4 PH Shafts
Shafts can experience both mechanical loading and environmental exposure.
A 17-4 PH shaft can provide:
- High strength
- Good hardness
- Useful corrosion resistance
- Machinability in suitable conditions
Potential applications include:
- Pump shafts
- Drive shafts
- Mechanical shafts
- Marine shafts
- Industrial machinery
The selected aging condition should match the shaft’s mechanical requirements.
17-4 PH Valve and Pump Components
Valve and pump components may experience:
- Pressure
- Fluid exposure
- Mechanical loads
- Repeated operation
- Wear
17-4 PH can be considered for selected components where strength and corrosion resistance are required together.
Applications can include:
- Valve stems
- Valve components
- Pump shafts
- Pump components
- Impeller-related parts
Actual material suitability depends on the process fluid and operating conditions.
17-4 PH Fasteners
17-4 PH is commonly considered for high-strength stainless-steel fasteners.
Potential products include:
- Bolts
- Nuts
- Studs
- Screws
- Washers
- Custom fasteners
Its precipitation-hardening capability allows fasteners to achieve high strength.
For fastener procurement, specify the applicable fastener standard and required condition.
17-4 PH Aerospace Applications
Aerospace components often require:
high strength + corrosion resistance + controlled material properties.
17-4 PH has been used in selected aerospace applications because it can achieve high strength while retaining stainless-steel corrosion characteristics.
Potential applications include:
- Aircraft hardware
- Fasteners
- Shafts
- Landing-gear-related components
- Structural fittings
- Engine-related components
Aerospace purchasing generally requires strict specification control and traceability.
17-4 PH Marine and Oil & Gas Applications
Marine and oil-and-gas equipment can expose components to aggressive operating environments.
17-4 PH may be considered for selected:
- Pump components
- Valve parts
- Shafts
- Fasteners
- Mechanical components
However, corrosion performance depends on the actual environment.
For chloride-rich or severe service, the specific 17-4 PH condition and corrosion mechanism must be evaluated carefully.
17-4 PH Machining
17-4 PH machining behaviour depends strongly on the material condition.
Solution-treated material is generally easier to machine than heavily aged high-strength material.
Machining considerations include:
- Proper cutting tools
- Appropriate speeds
- Controlled feeds
- Adequate coolant
- Rigid workholding
- Avoiding excessive work hardening
For precision components, machining should be planned around the material’s final heat-treatment condition.
17-4 PH Welding
17-4 PH can be welded using suitable procedures.
However, welding may affect the material’s final mechanical properties and corrosion behaviour.
Important considerations include:
- Filler-metal selection
- Heat input
- Pre-cleaning
- Joint preparation
- Post-weld heat treatment
- Final aging condition
Critical applications should use qualified welding procedures.
17-4 PH Testing and Certification
Industrial buyers may request:
- Chemical analysis
- Tensile test
- Yield test
- Elongation
- Hardness
- PMI
- Dimensional inspection
- Heat number traceability
- Material Test Certificate
- Third-party inspection
Additional documentation can include:
- EN 10204 3.1
- EN 10204 3.2
- Heat-treatment charts
- Inspection reports
- Raw-material certificates
For critical components, testing requirements should be finalized before the order is placed.
17-4 PH Round Bar Price
17-4 PH Round Bar Price depends on several factors.
These include:
- Diameter
- Length
- Quantity
- H900/H1025/H1150 condition
- Finish
- Specification
- Testing
- Certification
- Stock availability
- Machining requirements
17-4 PH is a specialty stainless-steel grade, so its price is generally different from standard 304 or 316 stainless steel.
For an accurate quotation, send the complete material requirement.
How to Buy 17-4 PH Round Bar
A good purchase enquiry can look like this:
Material: 17-4 PH
UNS: S17400
AISI: 630
Specification: ASTM A564
Condition: H900
Diameter: ______ mm
Length: ______ mm
Quantity: ______ kg
Finish: ______
Tolerance: ______
Testing: ______
Certificate: ______
Application: ______
This gives the supplier the information required to identify the correct product.
17-4 PH Round Bar Supplier in Mumbai
If you are searching for a 17-4 PH Round Bar Supplier in Mumbai, don’t compare suppliers on price alone.
For precipitation-hardening stainless steel, verify:
- Correct grade
- UNS designation
- Applicable standard
- Heat-treatment condition
- Chemical composition
- Mechanical properties
- Heat number
- Testing
- Certification
- Dimensions
- Delivery schedule
Manan Steel & Metals supplies stainless steel, alloy steel and specialty materials for industrial procurement and manufacturing requirements.
If you require 17-4 PH Round Bar, AISI 630, UNS S17400, H900, H1025 or H1150 material, send your required size and quantity for availability and quotation.
Frequently Asked Questions
What is 17-4 PH Round Bar?
17-4 PH Round Bar is a precipitation-hardening stainless-steel round bar known for its combination of high strength and corrosion resistance.
What is the UNS number of 17-4 PH?
The UNS designation is S17400.
Is 17-4 PH the same as AISI 630?
17-4 PH is commonly designated as AISI 630 and UNS S17400.
What does PH mean in 17-4 PH?
PH means precipitation hardening, referring to the heat-treatment mechanism used to increase the alloy’s strength.
What is 17-4 PH H900?
H900 is an aging condition used to develop a high-strength and high-hardness condition in 17-4 PH stainless steel.
What is the difference between H900 and H1150?
H900 generally prioritizes higher strength and hardness, while H1150 provides a different balance with greater toughness and lower strength.
Is 17-4 PH corrosion resistant?
Yes. It provides useful corrosion resistance, although actual performance depends on the environment, heat-treatment condition and application.
Is 17-4 PH suitable for shafts?
Yes. 17-4 PH Round Bar is used for selected shafts where high strength and corrosion resistance are required.
Can 17-4 PH be machined?
Yes. It can be machined, although machining behaviour depends on its heat-treatment condition.
What is 17-4 PH Round Bar price?
Price depends on size, quantity, condition, specification, finish, testing, certification and availability.
Where can I buy 17-4 PH Round Bar in Mumbai?
Contact Manan Steel & Metals with your required diameter, length, quantity and material condition for availability and quotation.
Request a Quotation
Looking for a 17-4 PH Round Bar Supplier in Mumbai?
Send your requirement:
Material: 17-4 PH / AISI 630
UNS: S17400
Condition: H900 / H1025 / H1150 / Other
Diameter: ______ mm
Length: ______ mm
Quantity: ______ kg
Finish: ______
Specification: ______
Testing: ______
Certificate: ______
Application: ______
Phone: 7977369869
Email: manansteel@gmail.com
Manan Steel & Metals
Shop No. 2, Hira Building
97 Khetwadi Main Road (Nanubhai Desai Road)
Girgaon, Mumbai – 400004
Maharashtra, India
Phone: 7977369869
Email: manansteel@gmail.com
Conclusion
17-4 PH stainless steel is a material worth considering when a component requires more than conventional stainless-steel performance.
Its ability to achieve high strength through precipitation hardening makes it suitable for selected shafts, fasteners, valve components, pump parts, aerospace hardware and other demanding industrial components.
But one detail should never be overlooked:
17-4 PH is not one single mechanical-property condition.
H900, H1025, H1150 and other conditions can produce significantly different combinations of strength, hardness and toughness.
For this reason, industrial buyers should specify the UNS designation, applicable standard, diameter, length and heat-treatment condition when requesting 17-4 PH Round Bar.
If you are sourcing 17-4 PH Round Bar in Mumbai, send your complete requirement to Manan Steel & Metals for availability and quotation.
🔗 OUTBOUND LINKS — ADD THESE IN WORDPRESS
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1. ASTM International
Anchor text: ASTM stainless steel standards
Place under: “17-4 PH Material Specifications”
2. ASM International
Anchor text: materials engineering resources
Place under: “17-4 PH Mechanical Properties”
3. NASA Technical Reports Server
Anchor text: NASA technical research database
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4. Nickel Institute
Anchor text: nickel alloy and stainless steel resources
Place under: “17-4 PH Corrosion Resistance”
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🎯 KEYWORD COVERAGE
Commercial Searches
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Technical Searches
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- 17-4 PH Tensile Strength
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- UNS S17400
- AISI 630
Heat-Treatment Searches
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Application Searches
- 17-4 PH Shafts
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