Stainless Steel 17-4 PH Machining
A Guide to 17-4 PH CNC Machined Parts: Properties, Applications and Design Considerations
What is 17-4 PH?
Heat Treated Conditions
Main Attributes of 17-4 PH
17-4 PH Machining Service
Reasons to Choose Penta
Components, Applications and Industries
Machinability
Other Names
Technical Properties
Chemical Composition
Further Reading
What is 17-4 PH?
17-4 PH is a precipitation hardening martensitic stainless steel. It is an American aerospace grade that contains 4% copper. It can be supplied in the annealed condition (condition A - although it should not be used in the annealed condition) or heat treated.
Heat treated conditions:
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Main Attributes of 17-4 PH:
- High tensile strength
- High yield strength
- Excellent hardness
- Good corrosion resistance - on par with the more readily available stainless 304
- Outstanding wear resistance
- Good mechanical properties up to 316°C
- Good welding characteristics
17-4 PH Machining Service - 17-4 PH Milling & Turning
Penta Precision supplies highly accurate 17-4 PH machined parts throughout the UK. Customers turn to us when they have had quality and delivery issues with their existing suppliers and need a reliable precision machining partner.
We communicate well with customers, we take care with the projects placed with us and we are consistent in our service delivery. See our Proven Process page to find out more about our winning formula.
"Penta Precision provide an excellent service to us. They offer a helpful, professional and friendly service. I would recommend anyone looking for sub-contracting machining use them." Peter - Business Development Manager
Penta Precision provides the following 17-4 PH machining services:
- CNC milling – prototypes & large batch runs
- CNC turning – prototypes & large batch runs
- Insert installation
- Part marking
- Manual milling
- Manual turning
- Machining design advice
- Machining drawing service
Reasons to Choose Penta:
- ISO 9001:2015 quality assurance
- Consistent high quality machined parts
- Reliable delivery dates - our track record speaks volumes
- Exceptional customer service and communication
- Machining design advice
- Extensive experience in our field
We are regularly machining 17-4 PH for customers all over the UK. Our customers depend on our machining expertise as well as our outstanding delivery performance, to machine the highest quality parts. If you'd like to discuss how we can help you with your 17-4 PH machining requirements, here's a list of ways to get in touch with us.
17-4 PH Components, Applications & Industries
Here are some examples of the industries and components for which 17-4 PH is appropriate. This is by no means an exhaustive list. Please do get in touch if you are considering using 17-4 PH and we can talk through your project with you.
Typical Components & Applications:
- Fasteners
- Valve parts
- Spindles
- Turbine blades
- Undercarriage components
- Missile and rocket fittings
- Springs
- Screws
- Bolts
- Gears
- Bushes
- Wear rings
- Chemical process components
Industry Examples:
- Aerospace
- Defence
- Chemical
- Petrochemical
- Food processing
- Marine
- Oil and gas
Stainless steel 17-4 PH has good machinability in the annealed condition - similar to that of stainless 304. Machining does become more difficult after hardening heat treatment.
Carbide or high speed steel tools should be used along with standard lubrication.
Similar or obsolete designation and trade names
You may also see 17-4 PH referred to as:
- 1.4542
- UNS S17400
- Grade 630
- S17400
- AISI 630
- NACE MR 0175
- ASTM A484
- ASTM A564
- AMS2303
- AMS5643
- AMS5643H1150
- ASME SA564
- X5CrNiCuNb16-4
17-4 PH Stainless Steel Physical Properties
|
Physical Properties |
Value |
|---|---|
| Density | 7.75 g/cm³ |
| Thermal Expansion | 10.8 x10^-6 /K |
| Modulus of Elasticity | 196 GPa |
| Thermal Conductivity | 18.4 W/m.K |
| Electrical Resistivity | 0.08 x10^-6 Ω .m |
Bar - Solution Annealed - Up to 100mm Dia / Thickness - Spec: EN 10088-3:2005
|
Mechanical Properties |
Value |
|---|---|
| Tensile Strength | 1200 MPa |
| Hardness Brinell | 360 Max HB |
Bar - at P800 - Up to 100mm Dia / Thickness - Spec: EN 10088-3:2005
|
Mechanical Properties |
Value |
|---|---|
| Proof Stress | 520 Min PA |
| Tensile Strength | 800 to 905 MPa |
| Elongation A | 18 Min % |
Bar - at P930 - Up to 100mm Dia / Thickness - Spec: EN 10088-3:2005
|
Mechanical Properties |
Value |
|---|---|
| Proof Stress | 720 Min PA |
| Tensile Strength | 930 to 1100 MPa |
| Elongation A | 16 Min % |
Bar - at P960 - Up to 100mm Dia / Thickness - Spec: EN 10088-3:2005
|
Mechanical Properties |
Value |
|---|---|
| Proof Stress | 790 Min PA |
| Tensile Strength | 960 to 1160 MPa |
| Elongation A | 12 Min % |
Bar - at P1070 - Up to 100mm Dia / Thickness - Spec: EN 10088-3:2005
|
Mechanical Properties |
Value |
|---|---|
| Proof Stress | 1000 Min PA |
| Tensile Strength | 1070 to 1270 MPa |
| Elongation A | 10 Min % |
Typical 17-4 PH Stainless Steel Chemical Composition (weight %)
|
Weight (%) |
Manganese |
Iron (Fe) |
Carbon (C) |
Phosphorous (P) |
Silicon (Si) |
Sulphur (S) |
Chromium (Cr) |
Nickel (Ni) |
Copper (Cu) |
Molybdenum (Mo) |
Niobium (Columbium) (Nb) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| min. | 0.00 | Bal | 0.00 | 0.00 | 0.00 | 0.00 | 15 | 3.00 | 3.00 | 0.00 | 0.00 |
| max. | 1.50 | Bal | 0.07 | 0.04 | 0.70 | 0.03 | 17 | 5.00 | 5.00 | 0.60 | 0.45 |
External links for further reading about 17-4 PH
