ASTM A564
Characteristics
High Strength: ASTM A564 stainless steel exhibits excellent mechanical properties, including high tensile strength and yield strength, making it suitable for applications requiring strength and durability.
Corrosion Resistance: ASTM A564 materials are resistant to corrosion, rust, and degradation in various environments, including harsh chemicals, acidic solutions, and marine environments.
Heat Resistance: ASTM A564 stainless steel maintains its strength and integrity at elevated temperatures, making it suitable for high-temperature applications such as heat exchangers, turbines, and exhaust systems.
Versatility: ASTM A564 covers a wide range of alloy compositions and grades, providing versatility for diverse applications in industries such as aerospace, oil and gas, power generation, and chemical processing.
Machinability: Depending on the specific grade and condition, ASTM A564 stainless steel can exhibit good machinability, allowing for ease of fabrication and machining into complex shapes and components.
Weldability: ASTM A564 materials are weldable using various welding processes, allowing for the fabrication of welded assemblies and structures in critical applications. However, proper welding procedures and post-weld heat treatment may be required to maintain mechanical properties and corrosion resistance.
ASTM A564 Data Sheet
Steel Grade
Dimensions and Tolerances
Equivalent Grades
Chemical Composition
Mechanical Properties
Fabrication and Welding
Steel Grade
ASTM A564 630
Also known as 17-4 PH stainless steel, this grade offers high strength, excellent corrosion resistance, and good mechanical properties. It is widely used in aerospace, defense, and marine applications, as well as in the manufacturing of shafts, gears, and valves.
ASTM A564 660
Known as 660 stainless steel or A286, this grade offers high strength, creep resistance, and excellent corrosion resistance in high-temperature environments. It is commonly used in aerospace, automotive, and power generation industries for critical components subjected to elevated temperatures and aggressive environments.
ASTM A564 904L
Stainless steel grade with high corrosion resistance, particularly in acidic and chloride-rich environments. ASTM A564 904L is commonly used in chemical processing, pharmaceutical, and petrochemical industries for equipment and piping systems requiring superior corrosion resistance.
ASTM A564 17-7PH
This grade offers a combination of high strength, good corrosion resistance, and excellent formability. ASTM A564 17-7PH is often used in aerospace, automotive, and medical applications for springs, fasteners, and components requiring precise dimensional control and mechanical performance.
Dimensions and Tolerances
Shape
The available shapes are round, square, hexagonal, and flat.
Diameter (Round Bars)
The diameter starts at 1/8 inch (3.175 mm) and above.
Width (Flat Bars)
The width starts at 1/4 inch (6.35 mm) and above.
Thickness (Flat Bars)
The thickness starts at 1/8 inch (3.175 mm) and above.
Length (Bars)
The length is specified as per customer requirements.
Tolerances
The tolerances for diameter, width, and thickness are ±0.005 inches (±0.13 mm). The tolerance for length is ±1/8 inch (3.2 mm) or as specified.
Equivalent Grades
United States
AISI/SAE 630 (17-4 PH), AISI/SAE 660 (A286), and AISI/SAE 904L.
United Kingdom
BS 970-1 Grade 630, BS 970-1 Grade 660, and more.
Japan
JIS G4303 Grade SUS630, JIS G4303 Grade SUS660, and JIS G4304 SUS904L.
European Union
EN 10088-3 Grade X5CrNiCuNb16-4, EN 10088-3 Grade X5CrNiMo17-12-2, and EN 10088-3 Grade X1NiCrMoCu25-20-7.
Chemical Composition
Carbon (C)
ASTM A564 630 (17-4 PH): 0.07% max
ASTM A564 660 (A286): 0.08% max
ASTM A564 904L: 0.02% max
Manganese (Mn)
ASTM A564 630 (17-4 PH): 1.00% max
ASTM A564 660 (A286): 2.00% max
ASTM A564 904L: 2.00% max
Phosphorus (P)
ASTM A564 630 (17-4 PH): 0.04% max
ASTM A564 660 (A286): 0.03% max
ASTM A564 904L: 0.045% max
Sulfur (S)
ASTM A564 630 (17-4 PH): 0.03% max
ASTM A564 660 (A286): 0.03% max
ASTM A564 904L: 0.035% max
Silicon (Si)
ASTM A564 630 (17-4 PH): 1.00% max
ASTM A564 660 (A286): 1.00% max
ASTM A564 904L: 1.00% max
Chromium (Cr)
ASTM A564 630 (17-4 PH): 15.00–17.50%
ASTM A564 660 (A286): 15.00–17.00%
ASTM A564 904L: 19.00–23.00%
Nickel (Ni)
ASTM A564 630 (17-4 PH): 3.00–5.00%
ASTM A564 660 (A286): 24.00–27.00%
ASTM A564 904L: 23.00–28.00%
Copper (Cu)
ASTM A564 630 (17-4 PH): 3.00–5.00%
ASTM A564 660 (A286): 1.50–2.50%
ASTM A564 904L: 1.00–2.00%
Molybdenum (Mo)
ASTM A564 630 (17-4 PH): 0.15–0.45%
ASTM A564 660 (A286): 1.00–1.50%
ASTM A564 904L: 4.00–5.00%
Nitrogen (N)
ASTM A564 630 (17-4 PH): Not specified
ASTM A564 660 (A286): Not specified
ASTM A564 904L: 0.10% max
Iron (Fe)
ASTM A564 630 (17-4 PH): Balance
ASTM A564 660 (A286): Balance
ASTM A564 904L: Balance
Mechanical Properties
Tensile Strength
ASTM A564 630 (17-4 PH): 110 ksi (760 MPa) min
ASTM A564 660 (A286): 130 ksi (896 MPa) min
ASTM A564 904L: 75 ksi (515 MPa) min
Yield Strength
ASTM A564 630 (17-4 PH): 105 ksi (724 MPa) min
ASTM A564 660 (A286): 105 ksi (724 MPa) min
ASTM A564 904L: 35 ksi (240 MPa) min
Elongation
ASTM A564 630 (17-4 PH): 15% min
ASTM A564 660 (A286): 20% min
ASTM A564 904L: 35% min
Reduction of Area
ASTM A564 630 (17-4 PH): 45% min
ASTM A564 660 (A286): 45% min
ASTM A564 904L: 45% min
Hardness (HRC)
ASTM A564 630 (17-4 PH): HRC 32 max
ASTM A564 660 (A286): HRC 32 max
ASTM A564 904L: Not specified
Fabrication and Welding
Fabrication
Cutting
Use conventional cutting methods such as sawing, shearing, or abrasive cutting to cut ASTM A564 stainless steel bars, billets, or forgings to the desired length.
Forming
ASTM A564 stainless steel can be formed using cold working techniques such as bending, coiling, and drawing. However, due to its high strength and work hardening characteristics, forming operations may require higher forces compared to carbon steels.
Machining
ASTM A564 stainless steel exhibits good machinability in annealed or solution-treated conditions. Use sharp tools, low cutting speeds, and ample coolant to minimize work hardening and tool wear.
Welding
Welding: Stainless steel bars, billets, and forgings covered by ASTM A564 can be welded using various welding processes such as gas tungsten arc welding (GTAW), gas metal arc welding (GMAW), and shielded metal arc welding (SMAW). Preheating, post-weld heat treatment, and specific heat treatments may be necessary to reduce the risk of cracking and ensure adequate corrosion resistance.
Finishing
ASTM A564 stainless steel bars, billets, and forgings can be finished using processes such as grinding, polishing, and buffing to achieve the desired surface finish and appearance.
Preparation
Ensure proper fit-up and joint preparation to achieve full penetration and minimize distortion. Clean the weld area to remove any contaminants or surface impurities.
Welding
Consumables
Choose welding consumables, including electrodes and filler metals, compatible with the base material to ensure proper weld quality and mechanical properties.
Welding Parameters
Control welding parameters such as heat input, travel speed, and inter-pass temperature to minimize distortion, prevent overheating, and achieve adequate fusion.
Post-Weld Treatment
Perform post-weld heat treatment as necessary to restore mechanical properties and improve corrosion resistance. This may include annealing, stress relieving, or solution heat treatment.
Inspection
Conduct appropriate non-destructive testing (NDT) to detect weld defects such as cracks, porosity, or incomplete fusion. Follow relevant codes and standards for inspection procedures.
Availability and Supply Chain
Wide Availability: ASTM A564-compliant stainless steel materials are widely available in the market through various suppliers, distributors, and manufacturers. Major steel producers and service centers often stock a range of grades and product forms to meet customer demand.
Global Supply Chain: The production and distribution of ASTM A564 materials are supported by a robust global supply chain network. Raw materials, such as alloying elements and stainless steel ingots, are sourced from reputable suppliers worldwide, while finished products are distributed globally to meet customer requirements.
Lead Times and Availability Issues: While ASTM A564 materials are generally available, lead times may vary depending on factors such as grade, size, and quantity. Certain grades or product forms may have longer lead times due to specific manufacturing processes or limited production capacity. Customers should communicate closely with suppliers to manage expectations and address any potential availability issues proactively.
