BS 3059 Gr 360 Carbon Steel Heat Exchanger Tubes for Steel Boiler and Superheater Tubes

 

Product Name:BS 3059 Steel boiler and superheater tubes 

Carbon ,alloy and austenitic Stainless Steel Tubes with specified elevated temperature properties

 

Size

Diameter   5-420mm 

Wall thickness    0.5-50mm 

Length        Upon request

 

Application : for boiler and superheater

 

Produce method: seamless ,welded

 

Delivery condition: hot finished, cold finished 

CHEMICAL COMPOSITION %  max
Steel Grade	C	Si	Mn	P	S	Cr	Mo	Ni	others
360	0.17	0.10-0.35	0.40-0.80	0.035	0.035	-	-	-	-
440	0.12-0.18	0.10-0.35	0.90-1.20	0.035	0.035	-	-	-	-
243	0.12-0.20	0.10-0.35	0.40-0.80	0.035	0.035	-	0.25-0.35	-	Al 0.012
620-460	0.10-0.15	0.10-0.35	0.4-0.7	0.03	0.03	0.7-1.10	0.45-0.65	-	Al 0.020
622-490	0.08-0.15	0.5	0.4-0.7	0.03	0.03	2.00-2.50	0.90-1.20	-	Al 0.020
629-470	0.15	0.25-1.00	0.30-0.60	0.03	0.03	8.00-10.00	0.90-1.10	-	Al 0.020
629-590
762	0.17-0.23	0.50	1.00	0.03	0.03	10.00-12.50	0.80-1.20	0.30-0.80	vanadium 0.25-0.35
Note:243,620-460,622-490,629-470,629-590 the following remained elements shall not exceed  Ni,0.30%;Cu ,0.25%;Sn,0.03%

  

MECHANICAL PROPERTIES min
Steel Grade	Tensile Strength Mpa	Yeild point or proof stress Mpa	Elongation %
360	360-500	235	24
440	440-580	245	21
243	480-630	275	22
620-460	460-610	180	22
622-490	490-640	275	20
629-470	470-620	185	20
629-590	590-740	400	18
762	720-870	470	15

 

Delivery condition	steel grade	Final supply condition	Temperature of heat treatment
	360,440(seamless hot finished)	hot finished	-
	360,440(seamless cold finished)	normalized	880-940
	243(all manufacturing condition)	normalized	900-960
	622-490(seamless)	normalized+tempered	normalized900-960 tempered680-750
	629-470(seamless)	annealed	850-950
	629-590(seamless)	normalized+tempered	normalized900-1000 tempered700-800
	762(seamless)	normalized+tempered	normalized1020-1070 tempered730-780

Processing:

RAW MATERIAL

↓

INCOMING INSPECTION

↓

STORAGE → CUTTING→HAMMERING → PICKING LUBRICATION → CLEANING → PHOSPHORI CLEAN

↓

ENDS CUTTING←STRAIGHTENING←HEAT TREATMENT↔MIDDLLE CHECK↔ COLD DRAWING ← LUBRICATING

↓

FINAL INSPECTION→BUNDING→STORAGE

Widely used in the field of:High pressure boiler

1~ Incoming Raw Material Inspection
2~ Raw Material Segregation to avoid steel grade mix-up
3~ Heating and Hammering End for Cold Drawing
4~ Cold Drawing and Cold Rolling, on line inspection
5~ Heat Treatment, +A, +SRA, +LC, +N, Q+T
6~ Straightening-Cutting to specified length-Finished Measuring Inspection
7~ Machanical Testing in own labs with Tensile Strength, Yield Strength, Elongation, Hardness, Impact, Mictrostruture etc
8~ Packing and Stocking.

100% of our steel tubes are dimensionally checked
100% of our steel tubes are visually checked to assure they have a perfect surface condition and no surface defects.
100% eddy current test and ultrosonic test to eliminate longitudinal and transversal defects.