25crmo4 1.7218 Seamless Multi Rifled Boiler Steel Tubes

• Customization: Available
• After-sales Service: Technical/Sample/Quality
• Warranty: Technical/Sample/Quality
• Model NO.: 25CrMo4
• 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

25CrMo4 1.7218 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
 

Standard:

BS EN 10216 Seamless steel tubes for pressure purposes - Technical delivery conditions
Part2: Non-alloy and alloy steel tubes with specified elevated temperature properties
 

25CrMo4 1.7218 Seamless Steel Tube 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

25CrMo4

1.7218

0.22 to 0.29

≤0,40

0.60 to 0.9

0.025

0.020

0.90 to 1.20

0.15 to 0.30

≤0.30

≤0.040

≤0.30

-

-

-

-

-

 

25CrMo4 1.7218 Seamless Steel Tube Heat Treatment

Steel grade	Steel number	Heat treatment	Austenizing Temperature °C	Cooling Medium	Tempering Temperature °C	Cooling medium
25CrMo4	1.7218	+QT	860 to 900	Air or Liquid	620 to 680	air

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

25CrMo4 1.7218 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
25CrMo4	1.7218	345	345	345	-	540 to 690	18	15	40	-	-	27	-

 

25CrMo4 1.7218 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
25CrMo4	1.7218	≤60	-	315	305	295	285	265	225	185	-	-	-

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