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双相不锈钢2205

双相不锈钢

Duplex stainless tube

· 用途：适用于原油脱盐装置中的热交换器和管道；甲醇生产制作管式反应器的催化剂管束；氯乙烯生产制作预冷凝器；纸浆和造纸工业硫酸蒸煮液预热器管束；陆上和海上油气工业的输送管道和集气管；海上石油平台的热交换器、水处理和供水系统、消防系统、喷水系统、稳水系统；化工系统加工和运输各种化学品的压力容器、管道、罐和热交换器。

· Usage：heat exchanger and tube on oil desalt device, catalyst tubebank of tubular reactor for methanol manufactering, precondenser for VCM, convey pipe and header of land/ ocean oil/ gas industry; heat exchanger, water treatment and supply system, fire extinguishing system, spraying system and water stablizing system of onsea petrol platform; pressure vessel, chanels, tanks, and heat exchanger used in chemicals process and transportation in chemical industry.

· 综合性能general characteristic

具有高的强度与韧性，综合机械性能好High intensity and tenacity, excellent mechnical performance.

良好的抗点蚀及缝隙腐蚀能力Good resistance to corrosive pitting and crevice corrosion.

良好的抗应力腐蚀破裂能力Good resistance to stress corrosion craking.

搞得抗均匀腐蚀能力Good resistance to uniform corrosion.

导热系数大，线膨胀系数小The material has bigger heat conductiovity, and smaller linear exppansibility.

良好的可焊性，热裂倾向小Good welding performance, small tendency of hot cracking.

牌号对照 grade

中国China		美国US	瑞典SW	德国DE
GB/T21833钢号	原习惯用钢号	美国US	瑞典SW	德国DE
022Cr19Ni5Mo3Si2N	00Cr18Ni5Mo3Si2	S31500	3RE60	1.4424
022Cr22Ni5Mo3N	00Cr22Ni5Mo3N	S31803	-	1.4462
022Cr23Ni5Mo3N	00Cr22Ni5Mo3N	S32205	SAF2205	-
022Cr25Ni7Mo4N	00Cr25Ni7Mo4N	S32750	SAF2507	1.4410

主要钢种（牌号）的化学成分和性能chemical composition and performance of main steel grade(trademark)

钢号 Grade	化学成分chemical composition
	C	Mn	P	S	Si	Ni	Cr	Mo	N	Cu
	W%
022Cr19Ni5Mo3Si2N	≤0.030	1.2-2.0	≤0.030	≤0.030	1.4-2.0	4.30- 5.20	18.0- 19.0	2.50- 3.00	0.05-0.10	-
022Cr22Ni5Mo3N	≤0.030	≤2.0	≤0.030	≤0.020	≤1.0	4.50- 6.50	21.0- 23.0	2.50- 3.50	0.08-0.20	-
022Cr23Ni5Mo3N	≤0.030	≤2.0	≤0.030	≤0.020	≤1.0	4.50- 6.50	22.0- 23.0	3.00- 3.50	0.14-0.20	-
022Cr25Ni7Mo4N	≤0.030	≤1.2	≤0.035	≤0.020	≤0.8	6.00- 8.00	24.0- 26.0	3.00- 5.00	0.24-0.32	≤0.5

主要钢种（牌号）的力学性能 Mechanical property of main grade（trademark）

钢号Grade	Rm(MPa)	Rp0.2(MPa)	A_[50]%	HRC
022Cr19Ni5Mo3Si2N	≥630	≥440	≥30	≤30
022Cr22Ni5Mo3N	≥620	≥450	≥25	≤30
022Cr23Ni5Mo3N	≥655	≥485	≥25	≤30
022Cr25Ni7Mo4N	≥800	≥550	≥15	≤32

物理性能Physical property

		20℃	100℃	200℃	300℃
密度density	Kg/dms	7.8	-	-	-
电阻 electric resistivity	μΩm	0.80	0.85	0.90	1.00
热导率 thermal conductivity	W/m℃	15	16	17	18
比热容 thermal capacity	J/kg℃	500	530	560	590
弹性模具 modulud of elasticity	GPa	200	194	186	180
柏松比 poissons ratio		0.3
线膨胀系数（温室-T）linear expansion（room temperature）	X10^-6/℃		13.0	13.5	14.0

金相组织 Metallographic structure

固溶状态下的金相组织为铁素体-奥氏体双相，其奥氏体含量为40~60%，不允许有σ相等脆性相析出。

Duplex of ferrite-austenite under solution condition, content of austenite is 40~60%, no brittleness precipitation of σ, etc.

产品标准standard：GB/T21833-2008，ASTM A789/ASME SA789， ASTM A789/ASME SA790企标等and enterprise standards, etc.

产品规格size：外径OD：16~219mm；壁厚WT：1~20mm