1.7779 20crmov13-5-5 Seamless Multi Rifled Boiler Steel Tubes

• Customization: Available
• After-sales Service: Technical/Sample/Quality
• Warranty: Technical/Sample/Quality
• Model NO.: 1.7779
• Technique: Hot Rolled
• Material: Carbon/Alloy/Stainless
• Surface Treatment: Black
• Usage: Boiler Pipe
• Section Shape: Round
• Feature: Multi Rifled
• Keywords: Boiler Steel Pipe
• Standard: DIN/ASTM/ISO/JIS
• Inspection: PED
• Transport Package: Wooden Case
• Specification: MAX 200MM
• Trademark: SHUNFU
• Origin: China

Product Description

Product Description

1.7779 20CrMoV13-5-5 Seamless Multi Rifled Boiler Steel Tubes

Application
The rifled tubes are served in super/ultra super critical water wall panels over 300,000KW of boiler, chemical, electricity industries. This has a groove on its inside surface which functions to raise thermal efficiency by distrubing the fluid within the tube, featuring an extremely high thermal conduction property.


Certificate
ISO9001: 2000, PED(Pressure Equipment Directive), TS16949, DNV, KR
 

Chemical component

Steel name

Steel number

C

Si

Mn

P max

S max

Cr

Mo

Ni

Al

Cu

Nb

Ti max

V

Cr+Cu+Mo+Ni

Others

20CrMoV13-5-5

1.7779

0.17 to 0.23

0.15 to 0.35

0.30 to 0.5

0.025

0.020

3.00 to 3.30

0.50 to 0.6

≤0.30

≤0.040

≤0.30

-

-

0.45 to 0.55

.

-

 

Seamless Steel Tube Heat Treatment

Steel grade	Steel number	Heat treatment	Austenizing Temperature °C	Cooling Medium	Tempering Temperature °C	Cooling medium
20CrMoV13-5-5	1.7779	+QT	980 to 1030	Air or Liquid	680 to 730	air

  +QT = Quenching +Tempering (air or liquid), 
 

20CrMoV13-5-5 1.7779 Seamless Steel Tube Mechanical Property

Steel name	Steel number	Tensile properties at room temperature				Tensile Strength MPa	Elongation A min.%		Impact properties  Minimum avornge absorbed energy KV J
		T≤16	16<T≤40	40<T≤60	60<T≤100				l		t
		MPa	MPa	MPa	MPa		I	t	20	0	-10	20	0
20CrMoV13-5-5	1.7779	590	590	590	-	740 to 8S0	16	14	40	-	-	27	-

 

20CrMoV13-5-5 1.7779 Seamless Steel Tube Minimum proof strength at elevated temperature

Steel name	Steel number	Wall thickness mm	Minimum proof strength MPa at temperature of ºC
			100	150	200	250	300	350	400	450	500	550	600
20CrMoV13-5-5	1.7779	≤60	-	575	570	560	550	510	470	420	370	-	-

Inspections

Chemical Composition,Mechanical Properties, Dimension and Surface Inspection,Inner Organization, Grain Size, UT Test
 

Size

OD 22-83mm
WT 4.5-18mm
Number of Ribs: 4-14

Package
Hexagonal bundles, strapped, both ends protected with plastic net Or wooden boxes according to length and destination Oiled inside / outside
Marking,oil-coating,varnish,end-protection by plastic caps to be confirmed.
 

Detailed Photos