17-4 stainless steel equivalent


17-4 PH is also known as stainless steel grade 630. The advantage of precipitation hardening steels is that they can be supplied in a “solution treated” condition, which is readily machinable.


What are the useful properties of stainless steel?

What are the properties of stainless steel?

  • Corrosion resistance. The corrosion resistance of stainless steel is mostly a result of the chromium content. …
  • Mechanical properties. As the term stainless steel encompasses a wide range of materials, the mechanical properties, of course, are quite diverse.
  • Electric & Magnetic properties. Stainless steel is a relatively poor conductor of electricity. …

Is 17 4 material magnetic?

Just as all martensitic metals, 17-4 is magnetic. 17-4 stainless steel can reach large levels of hardness, durability, and strength through heat treatment. 17-4 PH resists corrosion superior to any of the basic stainless steels that can be hardened. It is resistant to industries where the steel may be exposed to petroleum and most foods.

What is stainless steel and how is it made?

What is in stainless steel made of? Stainless steel is a metal alloy, made up of steel mixed with elements such as chromium, nickel, molybdenum, silicon, aluminum, and carbon. Iron mixed with carbon to produce steel is the main component of stainless steel. Chromium is added to make it resistant to rust. Click to see full answer.

What is the difference between stainless steel and zinc steel?

Zinc is cheaper than chromium, and therefore, in general, zinc alloys are relatively less expensive than compared to stainless steel. Though more expensive, stainless steel is a strong, tough material noted for its corrosion resistance. Though some Zinc alloys can be very strong, overall stainless steel is stronger.


What kind of steel is 17-4?

hardening martensitic stainless steel17-4 PH Stainless Steel is a precipitation hardening martensitic stainless steel. Typical usage is seen in applications requiring high strength and a modest level of corrosion resistance. Strength and toughness desired can be manipulated by temperate range in the heat treatment process.

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.

What is the hardness of 17-4 stainless steel?

The mechanical properties of annealed grade 17-4 stainless steel are displayed in the following table….Mechanical Properties.PropertiesMetricImperialPoisson’s ratio0.27-0.300.27-0.30Hardness, Brinell352352Hardness, Knoop (estimated from Rockwell C)363363Hardness, Rockwell C36363 more rows•Sep 26, 2012

Does 17-4 stainless steel contain cobalt?

Manganese-1.00% Sulphur-0.03% Tantalum and Colombium-0.15-0.45% Chromium-15-17.50%

Which is better SS 304 or 316?

For instance, 316 stainless steel is more resistant than 304 to salt and other corrosives. So, if you are manufacturing a product that will often face exposure to chemicals or a marine environment, 316 is the better choice.

How hard is 17-4 PH stainless steel?

17-4PH Stainless Steel High strength is maintained to approximately 600 degrees Fahrenheit (316 degrees Celsius). Alloy 17-4 PH is a precipitation hardening martensitic stainless steel with Cu and Nb/Cb additions. The grade combines high strength, hardness (up to 572°F / 300°C), and corrosion resistance.

Can 17-4 be hardened?

17-4 PH® (UNS S17400) It has good fabrication characteristics and can be age hardened using a single heat treatment in the 900-1150˚F temperature range. This grade has been used for a variety of oil field and chemical process equipment, as well as fittings and fasteners.

What is the hardness of 17-4 Condition A?

363Mechanical Composition TableGradeTensile Min (psi)Hardness BHN17-4Cond-A*363 MaxCond- H900190,000233 MinCond- H1025155,000331 Min3 more rows

How do you heat treat 17-4 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.

Why is cobalt added to stainless steel?

The presence of Co in the steel improves its durability and hardness at higher temperatures, reduces the fall in hardness of austenite and ferrite under the influence of temperature increase, and therefore is used as a supplement to some grades of high speed steels and tool steels.

Will 17 4PH rust?

Heat treatment in the 900°F (482°C) range produces the highest strength. The corrosion resistance of Alloy 17-4PH is comparable to 304 stainless steel in most environments, and is generally superior to the 400 series stainless steels.

What is Inconel made out of?

nickelComposition. Inconel alloys vary widely in their compositions, but all are predominantly nickel, with chromium as the second element.

What is a 17-4 precipitation hardener?

17-4 Precipitation Hardening also known as Type 630 is a chromium-copper precipitation hardening stainless steel used for applications requiring high strength and a moderate level of corrosion resistance. High strength is maintained to approximately 600 degrees Fahrenheit (316 degrees Celsius).

What is 17-4 PH?

Alloy 17-4 PH is a precipitation hardening martensitic stainless steel with Cu and Nb/Cb additions. The grade combines high strength, hardness (up to 572°F / 300°C), and corrosion resistance.

What temperature should chloride be at?

If there are potential risks of stress corrosion cracking, the higher aging temperatures then must be selected over 1022°F (550°C), preferably 1094°F (590°C). 1022°F (550°C) is the optimum tempering temperature in chloride media.

Is 304L a corrosion resistant alloy?

The alloy is subject to crevice or pitting attack if exposed to stagnant seawater for any length of time. It is corrosion resistant in some chemical, petroleum, paper, dairy and food processing industries (equivalent to 304L grade).

Is 17-4 PH a good corrosion resistance?

It has adequate resistance to atmospheric corrosion or in diluted acids or salts where its corrosion resistance is equivalent to Alloy 304 or 430. Alloy 17-4 PH withstands corrosive attacks better than any of the standard hardenable stainless steels and is comparable to Alloy 304 in most media.

What is 17-4 stainless steel?

17-4 Stainless is suitable for a wide variety of applications in the commercial, oil and gas, aerospace, and nuclear industries. It’s suitable for intricate parts requiring corrosion resistance and high strength that can be heat treated and welded with minimal distortion due to its precipitation hardening capabilities.

What is AMS 5643?

Bars, Wire, and Forgings are usually a single-melt product offered to AMS 5643 for aerospace applications. A CEVM (Consumable Electrode Vacuum Melt) or VAR (Vacuum Arc Remelt) product is specified in AMS 5622. Both specifications require that bars and forgings be restricted to 8” Diameter or less, or 8” least distance between parallel sides. A provision is included to allow larger sizes, provided that the Buyer and Seller agree upon mechanical properties for the size in question.

Is stainless steel weldable?

It is readily weldable by commercial processes without being preheated or post-heated, as usually done for 400-Series Stainless grades.

What is 17-4 alloy?

Type 17-4 is the most common grade of martensitic precipitation hardenable (PH) alloys. 17-4 provides an outstanding combination of high strength, good mechanical properties at temperatures up to 600°F (316°C), and short-duration, low-temperature heat treatments that minimize warpage and scaling. Its good corrosion resistance, formability …

What temperature is 17-4?

Below is a sampling of standard heat treatments for Condition A 17-4 material: Condition. Heat To (+/- 15°F / 8.4°C) Time at Temperature (h) H900. 900°F / 482°C. 1.

Is 17-4 stainless steel corrosive?

Type 17-4 PH stainless steel withstands corrosive attack better than any of the standard hardenable (martensitic) stainless steels and is comparable to Type 304 in most media . The alloy exposed to seacoast atmosphere will gradually develop overall light rusting and pitting in all heat-treated conditions. In common with other stainless steels, 17-4 material is subject to crevice attack if exposed to stagnant seawater for any length of time.

What is grade 17-4 stainless steel?

They are a combination of austenitic and martensitic steels. 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.

What grade of stainless steel is mildly formed?

Grade 17-4 stainless steel can be formed mildly.

What is stainless steel?

Stainless steels are known as high-alloy steels. They contain about 4-30% of chromium. They are further divided into martensitic, austenitic, and ferritic steels. Another group of stainless steels are known as precipitation-hardened steels. They are a combination of austenitic and martensitic steels.

How long to soak 17-4 stainless steel?

Grade 17-4 stainless steel is soaked at 1038°C (1900°F) for 30 min and cooled below 16°C (60°F) for complete martensite transformation in the condition A. The condition A material is treated at 482°C (900°F) for 1 h followed by cooling. Solution treated material is soaked for 4 h at specific temperature in H925, H1025, H1075, H1100, and H1150 conditions followed by cooling in air.

Can stainless steel be cold worked?

Grade 17-4 stainless steel can be cold worked using common techniques in spite of its high initial yield strength.

Can 17-4 stainless steel be machined?

Grade 17-4 stainless steel can be machined in the annealed condition. This alloy has long and gummy chips. Before final hardening, post machining solution treatment is needed if it is machined in the H1150M condition.

What is 17-4PH?

17-4PH is a widely-used martensitic precipitation-hardening stainless steel with a high concentration of chromium and nickel. It has many favorable properties, including excellent strength, good corrosion resistance, and excellent mechanical properties up to 600 °F (316 °C).

What temperature is 17-4PH?

Stainless Steel 17-4PH is available in the solution annealed condition at 1900 °F (1038 °C) and then air-cooled to 90 °F (32 °C).

Can AMS 5643 be welded?

Moreover, it can be welded using all standard techniques, including gas tungsten arc, gas metal arc, shielded metal arc, and plasma arc. To achieve desired mechanical properties, pre-weld and post-weld heat treatments are recommended. For the best results, we recommend the AMS 5643 wire.

Can 17-4PH be cold formed?

The alloy can also be cold-formed in limited form, primarily to plates in the annealed condition. However, stress corrosion resistance can be improved with re-aging. Furthermore, 17-4PH can be cut using mechanical operations, such as abrasive waterjets, machining, bandsaw, and shearing.

What is 17-4 stainless steel?

17-4 stainless steel, also known as SAE Type 630, is a common and exceptionally durable type of steel used in a diverse variety of industries and applications. The numbers “17-4” refer to its composition: ≈17% chromium and ≈4% nickel. It also can include between 3 and 5% copper.

What is the carbon content of 316L stainless steel?

316L stainless steel is defined by its low carbon content: no more than 0.03% carbon. In general, its composition is between 16-18% chromium and between 10-14% nickel (as well as trace amounts of manganese, silicon, phosphorus, sulfur and nitrogen).

What is SS steel?

Stainless steel (SS) comes in all shapes, sizes, and compositions. It’s an alloy comprised of several different elements such as iron, nickel, and chromium with superior corrosion resistance compared to its constituent parts. Different applications require different material properties.

Why is 316L SS used?

316L SS is favored in many industrial applications for its resistance to corrosion, especially when in prolonged contact with hydrogen. Hydrogen is used as a process medium across many different applications and can cause other materials to deteriorate over time — a process called hydrogen embrittlement.


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