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Duplex Stainless Steel Pipe

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Duplex Stainless Steel Pipe

Biphase stainless steel has two phase structure, which makes it the best stainless steel with high strength and corrosion resistance. Generally, in the case of low C, the Cr content is 18%~28% and the Ni content is 3%~10%. Some steels also contain Mo, Cu, Nb, Ti, N and other alloy elements.

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Specifications

(super) Duplex Stainless Steel

Compared with ferrite, plasticity and toughness is higher, there is no room temperature brittleness, intergranular corrosion resistance and welding performance were significantly increased, while maintaining a ferritic stainless steel of 475 ℃ brittleness and high thermal conductivity, has the characteristics of super plasticity. Compared with austenitic stainless steel, yield strength is improved, intercrystalline corrosion resistance, stress corrosion, corrosion fatigue and abrasion performances are improved.

Major Brands:	S31803/S32250, S32750, S32760, S31500, S31500, 32001, S32003, S32304
Common Standards(part):	ASTM A789 (ASME SA789) General purpose seamless and welded ferrite/austenitic stainless steel pipe
	ASTM A790 (ASME SA790) Seamless and welded ferrite/austenitic stainless steel nominal pipe
	ASTM A928 (ASME SA928) Standard specification for filler metal electro fusion welding ferrite/austenite (duplex) stainless steel tubing
	GB/T 21832-2008 Austenite - ferritic double - phase stainless steel welded steel pipe
	GB/T 21833-2008 Austenitic - ferritic dual - phase stainless steel seamless steel pipe
Performance Features:	1. Excellent comprehensive corrosion resistance and partial corrosion resistance, especially stress corrosion resistance, pitting corrosion resistance, crevice corrosion resistance, corrosion fatigue resistance and abrasion resistance
	2. Good weldability
	3. Good comprehensive mechanical properties
	4. Good intercrystalline corrosion resistance
	5. High cost performance and long service cycle

双相钢/超级双相钢（
国标新牌号	国标统一数字代号	美标牌号	美国UNS代码	欧标代码	国外公司商业牌号
022Cr23Ni4MoCuN	S23043	S32304	S32304	1.4362	SAF2304 (Sandvik)
022Cr22Ni5Mo3N	S22253	S31803	S31803	1.4462	-
022Cr23Ni5Mo3N	S22053	S32205	S32205	1.4462	SAF2205 (Sandvik)
022Cr25Ni7Mo4N	S25073	S32750	S32750	1.441	SAF2507(Sandvik)
022Cr25Ni7Mo3WCuN	S22583	S31260	S31260	-	-
03Cr25Ni6Mo3Cu2N	S25554	S32550	S32550	1.4507	UR52+
022Cr25Ni7Mo4WCuN	S27603	S32760	S32760	1.4501	Zeron100
00Cr27Ni7Mo5N	-	S32707	S32707	-	SAF2707(Sandvik)