What is ASTM A 565 GR 616 material?
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What is ASTM A 565 GR 616 material?
ASTM A565 Grade 616 (commonly referred to as AISI 422, UNS S42200, or 1.4935) is a hardenable martensitic stainless steel specifically designed for high-temperature service conditions up to 1200°F (650°C). Possessing excellent tensile strength, creep resistance, and corrosion resistance, it is an ideal choice for the manufacture of turbine blades, high-temperature bolts, and aircraft components.
What is ASTM A565 gr 616 equivalent ?
616 stainless steel (AISI 616) is primarily equivalent to AISI 422 stainless steel (UNS S42200). It is a martensitic high-temperature alloy frequently utilized in the power generation and aerospace sectors; its primary equivalent grades include ASTM A-565 Grade 616, WNr 1.4935, and X20CrMoWV12-1. This alloy is widely employed in components that require the retention of high strength at temperatures reaching up to 1200°F, such as steam turbine blades, bolts, and jet engine parts.
Chemical Composition of 616 Stainless Steel
| Element | Fe | Cr | Mo | W | V | C | Mn | Si | P | S | Ni |
| wt (%) | 81.9-85.8 | 11.0-12.5 | 0.9-1.25 | 0.9-1.25 | 0.2-0.3 | 0.20-0.25 | 0.5-1.0 | 0-0.5 | 0-0.025 | 0-0.025 | 0.5-1.0 |
Mechanical Properties of 616 Stainless Steel
| Property | Typical Value |
| Tensile Strength | 910-1080 MPa (130-160 ksi) |
| Yield Strength | 670-870 MPa (97-130 ksi) |
| Brinell Hardness | 260-330 |
| Rockwell Hardness | 21 |
| Vickers Hardness | 223 |
| Elongation | 15-17% |
| Elastic Modulus | 200 GPa (28 x 10⁶ psi) |
Physical Properties of 616 Stainless Steel
| Property | Metric Value | Imperial Value |
| Density | 7.9 g/cm³ | 490 lb/ft³ |
| Melting Point | 1480-1510 °C | 2700-2750 °F |
| Thermal Conductivity | 24 W/m·K | 14 BTU/h·ft·°F |
| Thermal Expansion | 10 µm/m·K | – |
| Electrical Conductivity | 4.7% IACS | 5.3% IACS for specific weight |
| Magnetic Properties | Ferromagnetic | Ferromagnetic |
ASTM A565 Gr 616 Stainless Steel Heat Treatment
ASTM A565 Grade 616 (AISI 422) is a martensitic stainless steel, hardened by quenching (1000–1065°C) in oil or air, followed by tempering (540–650°C) to achieve high strength, creep resistance, and toughness for turbine components. Annealing is done at 790–850°C, with stress relieving recommended at 200-300°C or 28°C below tempering.
ASTM A565 Gr 616 vs. 316: Corrosion Resistance
In contrast, ASTM A565 Grade 616 is a precipitation-hardening stainless steel designed more for high strength and hardness rather than corrosion resistance. It contains lower nickel and lacks sufficient molybdenum, resulting in a lower PREN value (typically below 20). As a result, its resistance to chloride-induced corrosion and pitting is noticeably weaker than that of 316. In practical environments such as saltwater exposure or chemical processing, 316 stainless steel can exhibit up to 30%–50% lower corrosion rates compared to Grade 616, along with better resistance to stress corrosion cracking and long-term oxidation stability.
Is ASTM A565 Gr 616 stainless steel similar to 422 stainless steel?
Yes, ASTM A565 Grade 616 stainless steel is effectively the same material as 422 stainless steel (UNS S42200). They are often used interchangeably in high-temperature, high-stress applications like turbine blades and bolting. AISI 616 is a martensitic stainless steel equivalent to UNS S42200 and often specified under ASTM A565 or AMS 5655.
If you have project requirements for A565 Gr 616 stainless steel bars, we invite you to place an order. GNEE maintains a substantial inventory of popular products for you to choose from. These materials can be processed into various practical product forms-including plates, bars, wires, and more. For detailed chemical composition specifications or to request free samples, please contact our factory immediately. We offer competitive pricing and exceptional service.Email: info@gneestainless.com
| Product Type | Size Range | Surface Condition / Finish |
|---|---|---|
| Hot Rolled Round Bar | Φ10 mm – Φ300 mm | Black / Peeled |
| Forged Round Bar | Φ300 mm – Φ600 mm | Rough Machined |
| Precision Cold Drawn Bar | Φ5 mm – Φ50 mm | Bright / Cold Drawn |
| Centerless Ground Bar | Φ10 mm – Φ100 mm | Ground (h8/h9 Tolerance) |
| Fixed Length | 1000 mm – 6000 mm | Cut-to-Size Available |
