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WSG P91

TIG welding rods for creep resisting steel

Quality WSG P91
Classification DIN EN ISO 21952-A W CrMo91
Material No. 1.4903
Classification AWS A5.28 ER90S-B9
Approvals TÜV 11950, CE
Characteristics and application TIG/GTAW rod for high temperature, creep resistant, modified 9%Cr-1%Mo martensitic steel (T91/P91). T91/P91 steel is commonly used at service temperatures up to 600°C. V, Nb and N additions provide this ‘creep strength enhanced ferritic’ (CSEF) alloy with improved high temperature creep resistance compared to standard CrMo creep resistant alloys. Alloy T91/P91 is widely used in the power generating industry for fossil fuel ultra-super-critical (USC) power plant boilers and turbines; the alloy is also finding applications in the chemical and oil and gas industries.
Base materials For matching P91, 9%Cr-1%Mo modified, creep resisting martensitic steels.
X10CrMoVNB 9 1
ASTM: A182/A336 F91, A213 T91, A217 C12A, A234 WP91, A335 P91, A387 91
Typical analysis in %
C: 0,10
Si: 0,32
Mn: 0,50
Cr: 8,70
Ni: 0,60
Mo: 1,00
V: 0,20
Nb: 0,04
Yield strength in Mpa ≥ 520
Tensile strength in Mpa ≥ 620
Elongation in % 4d/5d: ≥16
Charpy-V-Value (ISO-V) in J RT ≥ 47
Typical heat treatment Preheat temperature: 200°C
Interpass temperature: max. 300°C
PWHT: 760°C
Other products SAW UP-P91
MIG/GMAW ED-SG P91