904L Valve Seat Rings (UNS N08904, 1.4539, Alloy 904 L)

• Processing Object: Metal
• Molding Style: Forging
• Molding Technics: Forging
• Application: Machinery Parts
• Material: SS
• Heat Treatment: Quenching
• Model NO.: 904L
• Surface Treatment: Polishing
• Forging Tolerance: +/-0.5mm
• Standard: AISI
• Certification: SGS
• Material Grade of Valve Seat Rings: 15-5pH
• Transport Package: Plywooden Case
• Specification: CE
• Trademark: jj11
• Origin: China
• HS Code: 722840000
• Production Capacity: 5000 Tons/Year

Product Description

We are professional 904L Valve Seat Rings(UNS N08904, 1.4539, Alloy 904 L) from china


904L is a high-alloy austenitic stainless steel with low carbon content. The grade is intended for use under severe corrosive conditions. It has been application proved over many years and was originally developed to resist corrosion in dilute sulfuric acid. Structurally, 904L is fully austenitic and is less sensitive to precipitation ferrite and sigma phases than conventional austenitic grades with high molybdenum content. Characteristically, due to the combination of relatively high contents of chromium, nickel, molybdenum and copper 904L has good resistance to general corrosion, particularly in sulfuric and phosphoric conditions.
 
904L Chemical compositon:

Alloy	%	Ni	Cr	Mo	Cu	Fe	C	Mn	Si	P	S
904L	Min.	23	19	4	1	Balance
	Max.	28	23	5	2		0.02	2	1	0.045	0.035

904L Physical properties:

Density	8.0 g/cm3
Melting point	1300-1390 °C

904L Alloy minimum mechanical properties in the room temperature:

Status	Tensile strength  Rm N/mm2	Yield strength  RP0.2N/mm2	Elongation  A5 %
904L	490	216	35