17-4 PH Round Bar Supplier in Mumbai, India: Specifications, Properties, Applications & Buying Guide
SEO Meta Description:
Looking for 17-4 PH Round Bar in Mumbai, India? Explore UNS S17400, Type 630, ASTM A564 specifications, properties, sizes, applications and sourcing options.
URL Slug:/17-4-ph-round-bar/
17-4 PH Round Bar is a precipitation-hardening stainless steel product selected when a component needs a combination of high strength, hardness, toughness and useful corrosion resistance. Also identified as UNS S17400, Type 630 and 1.4542, 17-4 PH stainless steel is widely considered for demanding engineering components where conventional stainless steel grades may not provide the required strength level.
For buyers in Mumbai and across India, choosing the correct 17-4 PH Round Bar involves more than checking the diameter and price. The grade, material condition, heat-treatment requirement, dimensional tolerance, surface finish and inspection documentation can all affect whether the material is suitable for the intended application.
At Manan Steel & Metals, we supply industrial metal products for engineering, manufacturing and fabrication requirements. If you are looking for 17-4 PH Round Bar based on a particular diameter, length, condition or quantity, sharing your exact requirement before purchasing can help you receive a more accurate quotation.
Table of Contents
- What Is 17-4 PH Round Bar?
- 17-4 PH Stainless Steel Grade Identification
- Chemical Composition of 17-4 PH
- Important Properties of 17-4 PH Round Bar
- 17-4 PH Heat Treatment and Aging
- Available Sizes and Forms
- Applications of 17-4 PH Round Bar
- Why Material Condition Matters
- How to Select the Right 17-4 PH Round Bar
- 17-4 PH Round Bar Supplier in Mumbai
- Frequently Asked Questions
- Request a 17-4 PH Round Bar Quote
What Is 17-4 PH Round Bar?
17-4 PH Round Bar is a cylindrical bar manufactured from 17-4 precipitation-hardening stainless steel. The “PH” refers to precipitation hardening, a strengthening mechanism in which controlled heat treatment develops a high-strength metallurgical structure.
Unlike ordinary stainless steel grades that are selected primarily for corrosion resistance, 17-4 PH is often chosen when the application requires a more balanced combination of strength and corrosion resistance.
The material is commonly identified by several designations, including:
- UNS S17400
- Type 630
- AISI 630
- 1.4542
- SUS 630
The exact specification should always be confirmed against the customer’s drawing, purchase specification or applicable material standard before an order is placed.
Why Is 17-4 PH Used for Engineering Components?
One of the main reasons engineers consider 17-4 PH is its ability to achieve different combinations of strength and toughness through appropriate aging treatments.
This gives designers more flexibility when selecting material for shafts, pins, fasteners, valve components, pump parts and other precision-engineered components.
The alloy is also useful when corrosion resistance is required but the application demands considerably higher mechanical strength than many commonly used stainless steels can provide.
17-4 PH Stainless Steel Grade Identification
When searching for this material, buyers may encounter several different names.
| Designation | Identification |
|---|---|
| 17-4 PH | Common commercial designation |
| UNS S17400 | UNS designation |
| Type 630 | Stainless steel grade designation |
| AISI 630 | AISI designation |
| 1.4542 | EN/Werkstoff designation |
| SUS 630 | Japanese designation |
These designations are commonly associated with the same 17-4 PH stainless steel family, but the purchasing specification should still be checked carefully because product standards and delivery conditions can differ.
Common product standards encountered for 17-4 PH include ASTM A564 for precipitation-hardening stainless steel bars and shapes. Some aerospace and specialized applications may specify other standards such as AMS 5643.
17-4 PH Chemical Composition
The chemistry of 17-4 PH is built around chromium and nickel with copper and niobium additions that contribute to its precipitation-hardening characteristics.
A typical composition includes approximately:
| Element | Typical Range / Content |
|---|---|
| Chromium | 15–17.5% |
| Nickel | 3–5% |
| Copper | 3–5% |
| Manganese | Up to 1% |
| Silicon | Up to 1% |
| Niobium + Tantalum | 0.15–0.45% |
| Carbon | Up to 0.07% |
| Phosphorus | Up to 0.04% |
| Sulfur | Up to 0.03% |
| Iron | Balance |
Actual limits depend on the applicable material specification and product form. For critical applications, buyers should refer to the material test certificate rather than relying only on general published chemistry ranges.
Important Properties of 17-4 PH Round Bar
17-4 PH is particularly attractive because its properties can change significantly depending on the material condition and aging treatment.
Some of its important characteristics include:
High Strength
Properly aged 17-4 PH can achieve high tensile and yield strength, making it suitable for components subjected to mechanical loading.
Good Corrosion Resistance
The chromium content provides useful corrosion resistance for many industrial environments.
However, 17-4 PH should not automatically be treated as a substitute for every highly corrosion-resistant stainless steel or nickel alloy. The actual environment, temperature, chemicals and stress conditions should be evaluated.
Heat-Treatable
The precipitation-hardening mechanism allows the material to be processed into different strength conditions through controlled solution treatment and aging.
Good Dimensional Stability
The aging process can be useful for precision components because the strengthening treatment occurs at comparatively moderate temperatures.
Machinability
17-4 PH can be machined, but the machining behavior depends strongly on its supplied condition. Machining parameters should therefore be selected according to the material condition rather than treating every 17-4 PH bar identically.
17-4 PH Heat Treatment and Aging
Heat treatment is one of the most important subjects when purchasing 17-4 PH Round Bar.
The material may be supplied in a solution-treated condition and subsequently aged to obtain the required combination of strength and toughness.
Commonly referenced conditions include:
- H900
- H925
- H1025
- H1075
- H1150
- H1150M
The numbers refer to different aging treatments and therefore produce different mechanical-property combinations.
For example, an application requiring maximum strength may specify a different condition from one where higher toughness is more important.
This is why simply asking for “17-4 PH Round Bar” may not be enough for a technical quotation.
If your drawing specifies an H-condition, include it in your inquiry.
Available 17-4 PH Round Bar Sizes
17-4 PH Round Bar can be sourced in different diameters and lengths depending on stock availability, manufacturing route and customer requirements.
Depending on the requirement, buyers may request:
- Small diameter round bars
- Standard industrial diameters
- Large diameter bars
- Cut-to-length pieces
- Bright finished bars
- Machined bars
- Forged bars
Exact availability should be confirmed before placing an order because stock dimensions can vary between suppliers.
For a quotation, provide:
Grade + diameter + length + condition + quantity + required standard + inspection/documentation requirements.
For example:
17-4 PH / UNS S17400 / Ø50 mm × 1 metre / required condition / quantity
This gives a supplier much more useful information than simply asking for “17-4 bar.”
Applications of 17-4 PH Round Bar
The combination of strength, hardness and corrosion resistance makes 17-4 PH useful across several engineering sectors.
Oil & Gas
17-4 PH can be considered for selected components used in oil and gas equipment where strength and corrosion resistance are important.
Petrochemical Equipment
The material may be used for engineered components exposed to demanding operating conditions.
Pump and Valve Components
Its strength and hardness make it suitable for various shafts, stems, components and precision parts.
Aerospace Components
17-4 PH has applications in aerospace engineering where high mechanical performance and controlled material properties are required.
Chemical Processing
The grade can be selected for certain chemical-processing components depending on the specific operating environment.
General Engineering
It is also used for shafts, bushings, pins, fasteners, gears, fittings and other machined components.
The correct grade should always be selected according to the actual service environment rather than simply choosing a material because it is marketed as corrosion resistant.
17-4 PH vs 304 Stainless Steel
A common question from buyers is whether 17-4 PH can replace 304 stainless steel.
The answer depends on the application.
304 stainless steel is a widely used austenitic grade known for its general corrosion resistance and broad fabrication capability.
17-4 PH, on the other hand, is a precipitation-hardening stainless steel designed to provide substantially higher strength after suitable heat treatment.
Therefore:
| Requirement | 304 Stainless Steel | 17-4 PH |
|---|---|---|
| General corrosion resistance | Excellent for many environments | Good for many environments |
| High strength | Moderate | High after aging |
| Heat treatment for strengthening | Not precipitation hardened | Yes |
| Machined engineering components | Common | Very common |
| High-strength shafts/components | Application dependent | Often preferred |
The right choice depends on the component design and operating environment.
How to Select the Right 17-4 PH Round Bar
Before purchasing, check these seven points:
1. Grade
Confirm that the material is actually specified as 17-4 PH / UNS S17400 or the required designation.
2. Standard
Check whether your requirement calls for ASTM A564, AMS 5643 or another applicable standard.
3. Condition
Specify whether the material needs to be supplied solution treated or in a particular aging condition such as H900 or H1150.
4. Diameter
Give the exact required diameter and tolerance.
5. Length
Mention whether you require full-length bars or cut pieces.
6. Quantity
Quantity can affect both availability and quotation.
7. Documentation
If your project requires material traceability, mention the required inspection documents before ordering.
Why Buy 17-4 PH Round Bar from a Mumbai Supplier?
For customers located in Mumbai, sourcing locally can simplify communication, inspection coordination, transportation and urgent material requirements.
A supplier should be able to understand the difference between a basic material inquiry and a specification-driven industrial purchase.
At Manan Steel & Metals, customers can share their required grade, dimensions, quantity and technical requirements so that the material can be evaluated against the actual application.
For industrial purchasing, the lowest quoted price is not always the most economical option. Material grade, condition, documentation, dimensional accuracy, delivery schedule and suitability for the application can all affect the final cost of a project.
Frequently Asked Questions
Is 17-4 PH the same as Type 630?
17-4 PH is commonly associated with stainless steel Type 630 and UNS S17400. The exact material specification should still be confirmed against the applicable standard.
What is the equivalent of 17-4 PH?
Common designations include UNS S17400, Type 630, AISI 630, 1.4542 and SUS 630.
Is 17-4 PH stainless steel corrosion resistant?
Yes. 17-4 PH provides useful corrosion resistance for many industrial applications, along with significantly higher strength potential after appropriate aging.
What is H900 in 17-4 PH?
H900 is one of the commonly specified aging conditions for 17-4 PH. It is associated with a high-strength condition. The required condition should be selected according to the component’s mechanical-property requirements.
Is 17-4 PH magnetic?
Yes. 17-4 PH is a martensitic precipitation-hardening stainless steel and is generally magnetic.
Where is 17-4 PH Round Bar used?
Typical applications include shafts, valve components, pump parts, fasteners, pins, fittings, aerospace components and other engineered parts requiring high strength with corrosion resistance.
17-4 PH Round Bar Standards and Technical References
When purchasing 17-4 PH Round Bar, it is important to verify the applicable material standard rather than relying only on the commercial grade name. ASTM A564/A564M covers hot-finished and cold-finished age-hardening stainless steel bars and shapes, including Type 630 material. Buyers can verify the scope and requirements directly through the ASTM International specification for A564/A564M.
For additional material-property information, engineers can also consult independent technical databases. MatWeb’s 17-4 PH material database provides reference information for different 17-4 PH material conditions and can be useful when comparing properties.
Because 17-4 PH can achieve different mechanical properties depending on its aging treatment, the specified condition should always be confirmed before ordering. Technical data for conditions such as H900 and H925 can be reviewed through 17-4 PH material data references on MatWeb.
For critical engineering applications, the purchaser should always compare the supplier’s Material Test Certificate (MTC) with the required specification, chemical composition, mechanical properties, dimensions and heat-treatment condition before accepting the material.
Looking for 17-4 PH Round Bar in Mumbai?
Choosing the correct 17-4 PH material starts with understanding the complete requirement—not just the grade name.
If you are looking for 17-4 PH Round Bar, UNS S17400 or Type 630 for an engineering, manufacturing or industrial application, send your required diameter, length, quantity, material condition and specification to Manan Steel & Metals.
Our team can review your requirement and help you identify the appropriate material option for your application.
Request a quotation for 17-4 PH Round Bar today and share your exact size and quantity for availability and pricing.