17-4 PH Stainless Steel Round Bars, Sheets and Plates: Sizes, Standards and Procurement Guide
17-4 PH Stainless Steel 17-4 PH stainless steel is a precipitation-hardening stainless steel used in industrial and engineering applications requiring high strength, hardness and corrosion resistance. Also identified as UNS S17400 and commonly known as Type 630, this grade is available in different product forms depending on the manufacturing process and application.
For procurement teams, selecting the correct 17-4 PH stainless steel involves more than specifying the material grade. Product form, dimensions, heat-treatment condition, applicable ASTM standard and material documentation must all be considered before placing an order.
Manan Steel & Metals deals in specialty metals and alloys, including 17-4 PH stainless steel. Buyers can share their technical requirements for a product enquiry.
17-4 PH Stainless Steel Product Forms
17-4 PH is used in different product forms depending on the component design and manufacturing requirements.
1. 17-4 PH Stainless Steel Round Bars
17-4 PH round bars are used as starting material for machined and engineered components.
Common applications include:
- Precision-machined components
- Pump and valve parts
- Shafts and mechanical components
- Industrial equipment hardware
- Specialised engineering components
When purchasing round bars, specify the required diameter, length, quantity, material condition and surface finish.
2. 17-4 PH Stainless Steel Sheets
17-4 PH sheets may be used for selected fabricated and machined components where a flat product with precipitation-hardening properties is required.
Potential applications include:
- Industrial fabricated parts
- Precision components
- Specialised equipment panels
- Machined flat components
- Engineering assemblies
Specify thickness, width, length, quantity and surface requirements.
3. 17-4 PH Stainless Steel Plates
17-4 PH plates are considered for heavier flat sections and components manufactured through machining or fabrication.
Potential applications include:
- Industrial equipment components
- Machined plates
- Specialised engineering parts
- Fabricated assemblies
- Heavy-duty mechanical components
Buyers should clearly mention plate thickness, width, length, material condition and applicable standard.
17-4 PH Stainless Steel Sizes: What Should Buyers Specify?
There is no single universal size range that applies to every manufacturer or supplier. Available dimensions depend on product form, manufacturing route, material condition and supplier capability.
Use the following checklist when preparing an enquiry:
| Product form | Dimensions to specify |
|---|---|
| Round bar | Diameter and length |
| Sheet | Thickness, width and length |
| Plate | Thickness, width and length |
In addition to dimensions, buyers should provide:
- Grade: 17-4 PH stainless steel
- UNS designation: S17400
- Required heat-treatment condition
- Applicable material specification
- Quantity
- Surface-finish requirements
- Inspection and documentation requirements
- Delivery location
Complete specifications help suppliers understand the requirement and prepare an accurate quotation.
ASTM Standards for 17-4 PH Stainless Steel
The applicable material standard depends on the product form.
ASTM A564/A564M – Bars and Shapes
ASTM A564/A564M is a commonly referenced specification covering age-hardening stainless steel bars and shapes.
It is relevant when specifying 17-4 PH bar products, subject to the exact grade, product requirements and applicable edition.
ASTM A693 – Plate, Sheet and Strip
ASTM A693 covers precipitation-hardening stainless steel plate, sheet and strip.
When purchasing flat 17-4 PH products, buyers should confirm that the ordered grade, condition and dimensions meet the relevant specification.
Confirm the Applicable Specification
Before releasing a purchase order, verify:
- Correct UNS designation
- Product form
- Applicable ASTM specification
- Required heat-treatment condition
- Current specification edition
- Supplementary testing or inspection requirements
Reference: ASTM International
Understanding 17-4 PH Heat-Treatment Conditions Before Ordering
One of the most important procurement details for 17-4 PH stainless steel is its heat-treatment condition.
Commonly specified ageing conditions include:
| Condition | Nominal ageing temperature |
|---|---|
| H900 | 900°F |
| H1025 | 1025°F |
| H1075 | 1075°F |
| H1100 | 1100°F |
| H1150 | 1150°F |
These are condition designations rather than separate material grades.
Each condition provides a different combination of strength, hardness and toughness. The appropriate condition must be selected according to the component’s design and service requirements.
Do not order only by writing “17-4 PH” if a particular heat-treatment condition is required.
Documents to Check When Purchasing 17-4 PH Stainless Steel
Material documentation is important for maintaining quality and traceability.
1. Mill Test Certificate
Request the applicable Mill Test Certificate and check the grade, heat number, chemical composition and mechanical test results.
2. Chemical Composition
Verify that the reported chemical analysis meets the limits of the applicable specification.
3. Mechanical Test Results
Check tensile strength, yield strength, elongation and hardness where required by the purchase specification.
4. Heat-Treatment Condition
Confirm that the material has been supplied in the specified condition and that the supporting documentation identifies it correctly.
5. Heat Number and Traceability
Ensure that material identification and traceability meet the purchase order requirements.
6. Dimensional and Surface Inspection
Check dimensions, tolerances and surface finish against the agreed requirements.
For critical engineering applications, additional inspection or testing may be required.
How to Select the Right 17-4 PH Product Form
The appropriate product form depends on the manufacturing process and component design.
| Requirement | Product form to consider |
|---|---|
| Turned and machined cylindrical components | Round bar |
| Thin flat fabricated components | Sheet |
| Heavier flat machined or fabricated components | Plate |
The final selection should also consider the required mechanical properties, machining allowance, dimensional tolerances and applicable material standard.
Common Procurement Mistakes to Avoid
Buyers can reduce material-selection errors by avoiding these common mistakes:
- Ordering only by the name 17-4 PH without confirming UNS S17400.
- Not mentioning the required heat-treatment condition.
- Confusing ASTM A564/A564M with ASTM A693.
- Providing incomplete dimensions.
- Not checking the MTC and chemical analysis.
- Ignoring heat-number traceability.
- Assuming that every product form is available in the same dimensions.
- Selecting a material without reviewing the actual service environment.
A detailed purchase specification helps avoid unnecessary clarification and material discrepancies.
Frequently Asked Questions About 17-4 PH Stainless Steel Sizes and Standards
1. What is the UNS number of 17-4 PH stainless steel?
The UNS designation is S17400. It is also commonly known as Type 630 stainless steel.
2. Which ASTM standard applies to 17-4 PH round bars?
ASTM A564/A564M is commonly referenced for age-hardening stainless steel bars and shapes. Confirm the exact product requirements and applicable edition before ordering.
3. Which ASTM standard covers 17-4 PH sheets and plates?
ASTM A693 covers precipitation-hardening stainless steel plate, sheet and strip. Confirm the grade and required condition against the applicable specification.
4. Are 17-4 PH round bars available in different diameters?
17-4 PH round bars are specified in different diameters and lengths. Actual supply dimensions depend on supplier capability and material availability. Share your required dimensions for confirmation.
5. What heat-treatment conditions are available for 17-4 PH?
Commonly referenced ageing conditions include H900, H1025, H1075, H1100 and H1150. The required condition should be specified according to the application.
6. What documents should I request when purchasing 17-4 PH?
Depending on the purchase specification, request an MTC, chemical analysis, mechanical test results, heat-treatment details and heat or lot identification.
Enquire About 17-4 PH Stainless Steel at Manan Steel & Metals
Looking for 17-4 PH stainless steel round bars, sheets or plates for an industrial or engineering requirement?
Manan Steel & Metals deals in specialty metals and alloys, including 17-4 PH stainless steel, and welcomes product enquiries from manufacturers, engineering companies and procurement teams.
Share the following details:
- Material: 17-4 PH / UNS S17400
- Product form: Round Bar, Sheet or Plate
- Required dimensions
- Heat-treatment condition
- Applicable ASTM standard
- Quantity
- Documentation requirements
- Delivery location
Manan Steel & Metals
Website: https://manansteel.com/
Email: sales@manansteel.com
Phone: +91 98198 76962
For product and pricing enquiries, visit our Contact Us page.
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