ASTM A423, ASME SA423, Grade 1, Seamless and Electric-Welded Low-Alloy Steel Tubes, Economizer and air preheater, Sulfuric acid corrosion-resistant steel, S-TEN1, 0.3Cr-0.1Sb, ND Steel, Corten Steel Tube, Corten Steel Pipe, Weathering Steel, ASTM A423, ASME SA423, Grade 1, 09CrCuSb, 09CuPCrNi-A, 09CuPCrNi-B, Q355GNH

ASTM A423/A423M Standard Specification for Seamless and Electric-Welded Low-Alloy Steel Tubes

This is very special steel grade used by economizer and air preheater, named as weathering steel or sulfuric acid corrosion-resistant steel. China, Japan, USA all have their own industry system for this product. You can find below as details. The main difference are contents of Mn and Cr. Either Mn or Cr makes steel more harder and stronger, so it is the same usage, and 09CrCuSb is even better. US mills are out of these tubes business.

Material	09CrCuSb	1Cr18Ni9	Corten	S-TEN1
Corrision Speed	7.3	21.7	63	27.4
Times	1	2.97	8.63	3.75

Chemistry Composition

	C, %	Mn, %	P, %	S, %	Si, %	Cu, %	Cr, %	Ni, %	Mo, %	Sb, %
ASTM A423 Gr.1	0.15 max	0.55 max	0.06-0.16	0.060 max	0.10 min	0.20-0.60	0.24-1.31	0.20-0.70	-	-
S-TEN1	0.14 max	1.60 max	0.025 max	0.025 max	0.55 max	0.25-0.50	-	0.50 max	-	0.15 max
09CrCuSb	0.12 max	0.35-0.65	0.030 max	0.020 max	0.17-0.37	0.25-0.45	0.70-1.10	-	-	0.04-0.10

Mechanical Properties

	Tensile Strength, Mpa	Yield Strength, Mpa	Elongation, %
ASTM A423 Gr.1	415 min	255 min	25 min
S-TEN1	380 min	230 min	35 min
09CrCuSb	390-550	245 min	30 min

Outside Diameter & Tolerance

Outside Diameter, mm	Tolerance, mm
3.2≤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	±0.38

Wall thickness & Tolerance

Outside Diamter, mm	Tolerance, %
3.2≤OD＜38.1	+20/-0
38.1≤OD≤76.2	+22/-0

Parameter

Steel	09CrCuSb	1Cr18Ni9	Corten	S-TEN1
Corrision Speed	7.3	21.7	63	27.4
Times	1	2.97	8.63	3.75

Length: 6050mm; 6096mm; 7315mm; 11800mm; 12000mm; and so on.
Max developed length: 30 meters, also U bending can be offered.

Popular Dimensions

OD (mm)	WT (mm)	Length (mm)	OD (mm)	WT (mm)	Length (mm)
76.2	3.0	3000	60.3	3.0	3000
60.3	3.0	4800	60.3	3.0	3000

Keyword: Seamless and Electric-Welded Low-Alloy Steel Tubes, Economizer and air preheater, Sulfuric acid corrosion-resistant steel, S-TEN1, 0.3Cr-0.1Sb, ND Steel, Corten Steel Tubes, Corten Steel Pipes, Weathering Steel, ASTM A423, ASME SA423, Grade 1, 09CrCuSb

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