Alloy Steel T91 Tube

Material Grade

Grade T91 (UNS K91560 / Steel No. 1.4903)

Applicable Standards

ASTM A213 / ASME SA213, EN 10216-2, etc.

Outer Diameter (OD)

Approximately 6.00 mm – 2 500 mm (for seamless)

Wall Thickness (WT)

Approx. 0.3 mm – 50 mm alphanickel.com+1

Length

Standard lengths: 1 m – 12 m (single or double random)

Chemical Composition (typical)

C: 0.08-0.12 %; Mn: 0.30-0.60 %;
P: ≤ 0.020 %; S: ≤ 0.010 %;
Si: 0.20-0.50 %; Cr: 8.00-9.50 %;
Mo: 0.85-1.05 %; Ni: ≤ 0.40 %;
V: 0.18-0.25 %; Nb: 0.06-0.10 %;
N: 0.030-0.070 %.

Mechanical Properties (minimum)

Tensile Strength: ≥ 585 MPa;
Yield Strength: ≥ 415 MPa;
Elongation: ≥ 20 %.