Is 17-4 PH a stainless steel?
17-4 PH is a martensitic precipitation – hardened stainless steel. It’s known for its corrosion resistance and high levels of strength and hardness, especially when heat treated.
What is 17-4 PH condition a hardness?
17-4PH combines high strength and hardness with good corrosion resistance. The alloy is furnished in the solution annealed condition (Condition A). It should not be used at temperatures above 572°F (300°C) or for cryogenic service.
What type of steel is 17-4 PH?
martensitic precipitation hardened stainless steel
SAE Type 630 stainless steel (more commonly known as 17-4 PH, or simply 17-4; also known as UNS S17400) is a grade of martensitic precipitation hardened stainless steel. It contains approximately 15–17.5% chromium and 3–5% nickel, as well as 3–5% copper.
What does the PH stand for in 17-4 PH?
precipitation hardening
PH stainless steels are a group of alloys that are resistant to the effects of corrosion. To increase their yield strength, these alloys are subjected to heat treatment during precipitation hardening (PH) or age hardening.
What is the difference between 17-4 and 316 stainless steel?
The difference in iron content contributes to the magnetism and corrosion resistance. The 17-4 pH stainless steel is magnetic and less corrosion-resistant than 316L stainless steel. Standard 316L is slightly magnetic, but non-magnetic versions are available.
How do you heat treat 17-4 PH stainless steel?
Age hardening of 17–4 PH usually consists of two steps: solution treatment followed by quenching and subsequent aging for precipitation hardening. For 17–4 PH, the solution treatment is done at 1050 °C for 30 min while the aging temperatures range from 480 °C to 760 °C with a duration of two to four hours.
What is the yield strength of 17-4 stainless steel?
The grade combines a very high strength, hardness (up to 572°F / 300°C), and corrosion resistance. Mechanical properties can be optimized for various heat treatments. Very high yield strength up to 1100-1300 MPa (160-190 ksi) can be achieved.
What does condition a mean for 17-4 stainless steel?
17-4 PH is a martensitic precipitation hardening (age hardening) stainless steel that can provide both high strength and excellent corrosion resistance. In the annealed (solution treated condition- Condition A) the density of this material is 0.280 lb/in^3.
What are grades of stainless steel?
We offer the following grades:
- 303 Stainless Steel. Due to its sulfur and phosphorus content, 303 stainless steel is highly machinable.
- 304 / 304L Stainless Steel. 304 is the most commonly used austenitic stainless steel.
- 316 / 316L Stainless Steel.
- 321 Stainless Steel.
- 347 Stainless Steel.
How hard can you heat treat 17-4 stainless steel?
17-4 PH® is a martensitic precipitation hardening stainless steel offering high strength and hardness along with moderate corrosion resistance up to 600˚F. It has good fabrication characteristics and can be age hardened using a single heat treatment in the 900-1150˚F temperature range.
What is condition A for 17-4?
The ATI 17-4™ precipitation hardening stainless steel is furnished in the annealed condition. This is also called the solution heat treated condition, or Condition A. Annealing is conducted by heat treating at approximately 1900°F (1040°C) to 1950°F (1065°C) and cooling to room temperature.
What is the Rockwell hardness for 17-4 PH?
17-4 PH Stainless Steel Properties
| Condition | Ultimate Tensile Strength (PSI) | Hardness Rockwell |
|---|---|---|
| H900 | 190,000 | C40 |
| H1025 | 155,000 | C35 |
| H1075 | 145,000 | C32 |
| H1150 | 135,000 | C28 |
What are 3 main categories of stainless steel?
The Three Primary Types of Stainless Steel
- Austenitic stainless steel. There are two main characteristics of this type of stainless steel.
- Ferritic Stainless Steel. This type of stainless steel is the second most common type of alloy and is also magnetic.
- Martensitic Stainless Steel.
Which grade of stainless steel is the strongest?
440C stainless steel
Martensitic grades include 420 stainless steel, which is used in engineering applications like shafts and 440C stainless steel – the hardest and most abrasion resistant of all the stainless steel.
What is the hardness of 17-4 H1150?
28
On the Rockwell C scale, 17-4 H1150 Stainless Steel has a hardness of 28.
What are the 4 classification of stainless steel?
Stainless steel is generally divided into four distinct groups:
- Austenitic. The austenitic group comprises the most common types of stainless steel.
- Ferritic. Containing anywhere between 10.5% and 30% chromium, ferritic stainless steels usually have low carbon consistencies of not more than 0.1%.
- Duplex.
- Martensitic.
What is the difference between H1150 and HH1150?
HH1150 Condition A material heated 4 hours at 1150°F, air cooled, heated again for an additional 4 hours at 1150°F and air cooled. H1150-M Condition A material heated at 1400°F + 25°F for 2 hours, air cooled, then heated at 1150°F + 15°F for 4 hours and air cooled.
What are the 3 grades of stainless steel?
The general idea behind grading the metal is that stainless steel can be divided into three broad categories — austenitic, ferritic, and martensitic — based on the crystalline structure of its iron atoms.
What is the Rockwell hardness of 17-4 stainless steel?
Grade 17-4 stainless steel is the most widely used steel of the precipitation hardening grade steels. It has high toughness, strength, and corrosion resistance.
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Mechanical Properties.
| Properties | Metric | Imperial |
|---|---|---|
| Hardness, Brinell | 352 | 352 |
| Hardness, Knoop (estimated from Rockwell C) | 363 | 363 |
| Hardness, Rockwell C | 36 | 36 |
What’s the highest quality stainless steel?
18/10 Stainless Steel
This is the highest-quality flatware you can get. 18/10 offers superior corrosion resistance.