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660

660

660

STAINLESS STEEL 660

660

What is 660?

660 is a Fe-25Ni-15Cr type high-temperature alloy. It exhibits high yield strength and endurance and creep strength below 650℃, and also possesses good processing ductility and satisfactory welding performance.

Heat Treatment:(660 Class A.B.C.D)

Class A Solution treatment, at 900 ± 14°C for at least 2 hours, followed by liquid quenching; Hardening treatment , at 720 ± 14°C for at least 16 hours, then air-cooled.
Class B Solution treatment , at 980 ± 14°C for at least 1 hour, then liquid quenched; Hardening treatment, at 720 ± 14°C for at least 16 hours, then air-cooled
Class C Solution treatment, at 980 ± 14°C for at least 1 hour, then oil quenched; Hardening treatment, at 775 ± 14°C for at least 16 hours, then air-cooled, followed by holding at 650 ± 14 °C for at least 16 hours, then air-cooled
Class D Solution treatment, at 900 ± 14°C for at least 2 hours, liquid quenched or at 980 ± 14°C for at least 1 hour, then liquid quenched; Hardening treatment, at 720 ± 14°C for at least 16 hours, air-cooled. If performance is required, secondary aging is performed at 650 ± 14 °C for at least 16 hours, then air-cooled

660 Austenitic Stainless Steel Chemical Composition

660-2.jpg

660 Austenitic Stainless Steel Mechanical Properties

660 Austenitic Stainless Steel Applications

1-Thermal-Processing

Thermal Processing

2Welding

Welding

3

Oil & Gas

4Power-&-Energy

Power & Energy

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