Pdf ((new)) — Astm A564

Good weldability and can be machined in the solution-annealed condition. Accessing the Full PDF

According to the ASTM A564 specification, the material is generally supplied in the solution-annealed condition. After machining or forming, it can be subjected to various aging temperatures (H900, H1025, H1150, etc.) to achieve the desired balance of strength and toughness. For example, Type 630 (17-4PH) can be aged to achieve: Maximum strength and hardness. H1150 Condition: Maximum toughness and ductility. Industries and Applications

The standout feature of the steels covered by this specification is their ability to be (also known as precipitation hardening). This process involves heat treating the metal to significantly increase its yield strength and hardness without the risk of cracking or distortion that often plagues other high-strength steels. Popular Grades Under ASTM A564

A "ferrite-free" version of 17-4 PH, providing better transverse toughness. Typical Applications

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The most prominent grade covered is Type 630 , commonly known as 17-4 PH (UNS S17400). Other grades include Types 631, 632, and XM-25.

Due to their unique ability to combine high strength with moderate to high corrosion resistance, ASTM A564 stainless steels are extensively used in: Landing gear parts, structural components. Oil & Gas: Valve stems, pump shafts, blowout preventers.

Pumps, agitators, and heat exchanger parts exposed to corrosive chemical solutions.

The ASTM A564 standard covers standard requirements for age-hardening (precipitation-hardening) stainless steel bars, wires, and shapes. These materials are unique because they combine the excellent corrosion resistance of stainless steel with ultra-high mechanical strength achieved through heat treatment. Key Characteristics Covered: Good weldability and can be machined in the

It is important to note that Types 631 and 632 contain a large amount of ferrite in their microstructure, which can lead to low ductility in forgings and larger-diameter bars. Their applications should therefore be limited to small-diameter bars.

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Due to their robust mechanical profiles, materials produced to the ASTM A564 standard are vital across several critical industries:

The number represents the hardening temperature (e.g., 900∘F900 raised to the composed with power F 1150∘F1150 raised to the composed with power F For example, Type 630 (17-4PH) can be aged

The ASTM A564 specification encompasses several distinct metallurgical grades. The most widely utilized commercial grades include: Grade 630 (17-4 PH)

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“Types 631 and 632 contain a large amount of ferrite in the microstructure and can have low ductility in forgings and larger diameter bars. Applications should be limited to small diameter bar.”

| Feature Category | Details | |----------------|---------| | | Precipitation-hardening (age-hardening) stainless steels (e.g., 17-4 PH, 17-7 PH, 15-5 PH) | | Product Forms | Hot-rolled bars, cold-finished bars, and structural shapes | | Conditions | Various heat-treated conditions (Condition A, H900, H1025, H1075, H1150, etc.) | | Mechanical Properties | Tensile strength, yield strength, elongation, reduction of area, hardness | | Chemical Composition | Limits for C, Mn, Si, P, S, Cr, Ni, Cu, Nb, Al, etc. per grade | | Heat Treatment | Solution treatment + age hardening temperatures and times | | Applications | Aerospace, marine, chemical processing, oil & gas, high-strength fasteners, pump shafts |