What is the availability of the X10CrMoVNb9-1 Alloy seamless Pipes pipe

What is the availability of the X10CrMoVNb9-1 Alloy seamless Pipes and tubes 

Alloy Boiler Steel : X10CrMoVNb9-1 

X10CrMoVNb9-1 :  DESIGNATIONS​ 

ASTM / ASME plate  :  A/SA 387 gr.91

ASTM / ASME bar :  A/SA 182 F91

ASTM / ASME pipe :  A/SA 335 P91

W.stoff no:    1.4903

X10CrMoVNb9-1  APPLICATION:  Martensitic, high temperature steel. Main fields are for example powerplants, pressure valves and oil-, gas-, chemical industries. Excellent resistance to high working temperatures up to appr. 650°C 

X10CrMoVNb9-1  DELIVERY PROGRAMME

Our plates are always according to EN 1.4903/X10CrMoVNB9-1 / ASTM A 387 / ASME SA 387 with ultrasonic-test acc. to both EN 10160 S2/E3 and ASTM A578 level C. The material is tempered at 770°C

DIMENSION:  Plate : 6-60mm

Round Bar : 20-700mm

Forging : Yes 

Pipe : Yes 

X10CrMoVNb9-1   CHEMICAL COMPOSITION  : 

Al        min. 0,040 

C         0,08 - 0,12  

Cr        8,00 - 9,50 

Cu       max. 0,30

Mn        0,30 - 0,60

Mo        0,85 - 1,05

N          0,030 - 0,070 

Nb          0,06 - 0,10

Ni          max. 0,30 

P           max. 0,020

S           max. 0,005 

X10CrMoVNb9-1 MECHANICAL PROPERTIES : 

Yield :   min. 435 N/mm² 

Tensile :   580 - 760 N/mm² 

KV :  +20°C / 40J