P91/ T91 Alloy Steel Pipe Tube Material Data Sheet

P91/ T91 Pipe Tube Material Data Sheet

P91/ T91 Alloy steel tubes for high-temperature service

 

Material Data Sheet

Steel designation: Name Material No.
  P91
T91
UNS Designation: K91560
K90901
  X10CrMoVNb9-1 1.4903

P91/ T91 Pipe Tube Scope

This data sheet applies for seamless tubes

P91/ T91 Pipe Tube Application

The material P91/T91 is especially suited for steam boiler, boiler parts, boiler drum, pressure vessel for the apparatus engineering and similar purposes. It can be used in permanent operation with wall temperatures up to about 650 °C (1202 °F)

P91/ T91 Pipe Tube Chemical composition (Heat analysis in %)

Name

C

Si

Mn

P

S

Al

Cr

Mo

Ni

V

N

others

P91

0,08-

0,20-

0,30-

≤0,020

≤0,010

≤0,040

8,0-9,50

0,85-

≤0,40

0,18-

0,030-

Nb 0,06-

 

0,12

0,50

0,60

 

 

 

 

1,05

 

0,25

0,070

0,10

T91

0,07-

0,20-

0,30-

≤0,020

≤0,010

≤0,02

8,0-9,5

0,85-

≤0,40

0,18-

0,030-

Nb 0,06-

 

0,14

0,50

0,60

 

 

 

 

1,05

 

0,25

0,070

0,10

X10CrMoV

0,08-

0,20-

0,30-

≤0,020

≤0,010

≤0,040

8,0-9,5

0,85-

≤0,40

0,18-

0,030-

Nb 0,06-

Nb9-1

0,12

0,50

0,60

 

 

 

 

1,05

 

0,25

0,070

0,10
Cu ≤0,30

1) NT: normalizing and tempered
2) Longitudinal test piece
3) Transverse test piece
4) For wall thicknesses ≤ 8 mm the values of the transverse testpiece apply
5) Hardness max. 25 HRC

Types of Alloy Steel Pipe Types of Alloy Steel Tube