GB/T 21833 022Cr22Ni5Mo3N Austenitic-Ferritic (Duplex) Grade Stainless Steel Seamless Tubes and Pipes, ASTM A789/A789M, ASTM A790/A790M, 022Cr19Ni5Mo3Si2N, 022Cr22Ni5Mo3N, 022Cr23Ni4MoCuN, 022Cr23Ni5Mo3N, 022Cr24Ni7Mo4CuN, 022Cr25Ni6Mo2N, 022Cr25Ni7Mo3WCuN, 022Cr25Ni7Mo4N, 03Cr25Ni6Mo3Cu2N, 022Cr25Ni7Mo4WCuN, 06Cr26Ni4Mo2, 12Cr21Ni5Ti

GB/T 21833 Austenitic-Ferritic (Duplex) Grade Stainless Steel Seamless Tubes and Pipes

Standard: GB/T 21833
Equivalent Standards: ASTM A789/A789M, ASTM A790/A790M

Material: 022Cr19Ni5Mo3Si2N
Equivalent Material: X2CrNiMoSi18-5-3, 1.4424, SAF1805

Chemistry Composition

C, %	Si, %	Mn, %	P, %	S, %	Cr, %	Ni, %	Mo	N, %
0.03 max	1.4-2.0	1.2-2.0	0.03 max	0.03 max	18.0-19.0	4.5-5.2	2.5-3.0	0.05-0.10

Mechanical Properties

Tensile Strength , MPa	Yield Strength, MPa	Elongation, %	Hardness, HB
630 min	440 min	30 min	290 max

Outside Diameter & Tolerance

Hot rolled	Outside Diameter, mm	Tolerance, mm
	OD≤101.6	+0.4/-0.8
	101.6＜OD≤190.5	+0.4/-1.2
	190.5＜OD≤228.6	+0.4/-1.6
Cold Drawn	Outside Diameter, mm	Tolerance, mm
	OD＜25.4	±0.10
	25.4≤OD≤38.1	±0.15
	38.1＜OD＜50.8	±0.20
	50.8≤OD＜63.5	±0.25
	63.5≤OD＜76.2	±0.30
	76.2≤OD≤101.6	±0.38
	101.6＜OD≤190.5	+0.38/-0.64
	190.5＜OD≤228.6	+0.38/-1.14

Wall thickness & Tolerance

Hot rolled	Outside Diameter, mm	Tolerance, %
	OD≤101.6, WT≤2.4	+40/-0
	OD≤101.6, 2.4＜WT≤3.8	+35/-0
	OD≤101.6, 3.8＜WT≤4.6	+33/-0
	OD≤101.6, WT>4.6	+28/-0
	OD>101.6, 2.4＜WT≤3.8	+35/-0
	OD>101.6, 3.8＜WT≤4.6	+33/-0
	OD>101.6, WT>4.6	+28/-0
Cold Drawn	Outside Diameter, mm	Tolerance, %
	OD≤38.1	+20/-0
	OD>38.1	+22/-0

GB/T 21833 specifies the size, shape, weight, technical requirements, test methods, inspection rules, packaging, marking and quality certificate of austenitic-ferritic (duplex) stainless steel seamless tubes and pipes. GB/T 21833 is applicable to corrosion-resistant austenitic-ferritic (duplex) stainless steel seamless tubes and pipes.
GB/T 21833规定了奥氏体-铁素体型双相不锈钢无缝钢管的尺寸、外形、重量、技术要求、试验方法、检验规则、包装、标志和质量证明书。GB/T 21833适用于耐腐蚀的奥氏体-铁素体型双相不锈钢无缝钢管。

Length: 5800mm; 6000mm; 8000mm; 10000mm; 11800mm; and so on.
Max length: 18000mm, also U bending can be offered.

Keyword: stainless steel tube, stainless steel pipe, heat exchanger steel tube, ASTM A789

Home | About Us | Product | Know How | Contact Us