EPRI Creep Ductility Analysis Grade 91 Steel

Towards Development of a Predictive Equation to identify Metallurgical Risk

July 27th, 2016:

U. S. Metals is the only P91 High Energy Pipe Distributor that stocks ASME SA335 P91 Pipe to the EPRI Recommended Chemistry and Hardness. Our inventory covers from 1/2" through 36" with wall thickness up to 4" Thick.

In the latest ERPI Development, Jonathan Parker & Dr VirenKumar put forth a compelling discussion about Aberthaw Damage History, EPRI Re-emphasizes that there are Key Variables that affect Performance and cannot be Solely Remediated by Composition, Even properly heat treated Grade 91 base metal exhibits wide range of creep behavior –variability in Deformation and Ductility.

EPRI Agreed to Facilitate Further Independent Analysis of Available Data. Comparing Element Composition Distributions for High Damageand Low Damagein this ERPI document EPRI Creep Ductility Analysis Grade 91 Steel.

U. S. Metals has now added, to our globally recognized Seamless ASME SA335/ASTM A335 P91 inventory, material that will meet the requirements of the EPRI "Guidelines and Specifications for High-Reliability Fossil Power Plants". This EPRI document is a "Best Practice Guideline for Manufacturing and Construction of Grade 91 Components".



  • Trade Name
    1 1/4 Chrome
    2 1/4 Chrome
    5 Chrome
    9 Chrome
    91
    92
    Chrome Alloy Seamless Pipe
    A335
    A335
    A335
    A335
    A335
    A335
    Grade
    P11
    P22
    P5
    P9
    P91
    P92
    UNS #
    K11597
    K21590
    K41545
    S50400
    K91560
    K92460
     
    Chrome Alloy Welded Pipe
    A691
    A691
    A691
    A691
    A691
    ----
    Grade
    1 1/4CR
    2 1/4CR
    5CR
    9CR
    91
    ----
     
    Chrome Alloy Heater Tubes
    A213
    A213
    A213
    A213
    A213
    A213
    Grade
    T11
    T22
    T5
    T9
    T91
    T92
    UNS #
    K11597
    K21590
    K41545
    K90941
    K90901
    K92460
     
    Chrome Alloy Buttweld Fittings
    A234
    A234
    A234
    A234
    A234
    ----
    Grade
    WP11 / WP11W
    WP22 / WP22W
    WP5 / WP5W
    WP9 / WP9W
    WP91 / WP91W
    ----
     
    Chrome Alloy Flanges
    A182
    A182
    A182
    A182
    A182
    A182
    Grade
    F11
    F22
    F5
    F9
    F91
    F92
    Class 1 / UNS #
    K11597
    K21590
    K41545
    K90941
    K90901
    K92460
    Class 2 / UNS #
    K11572
    ----
    ----
    ----
    ----
    ----
    Class 3 / UNS #
    K11572
    K21590
    ----
    ----
    ----
    ----
     
    Chrome Alloy Forged Fittings
    A182
    A182
    A182
    A182
    A182
    A182
    Ident Symbol
    F11
    F22
    F5
    F9
    F91
    F92
    Class 1 / UNS #
    K11597
    K21590
    K41545
    K90941
    K90901
    K92460
    Class 2 / UNS #
    K11572
    ----
    ----
    ----
    ----
    ----
    Class 3 / UNS #
    K11572
    K21590
    ----
    ----
    ----
    ----
     
    Alloy Forged Valves
    A182
    A182
    A182
    A182
    A182
    A182
    Ident Symbol
    F11
    F22
    F5
    F9
    F91
    F92
    Class 1 / UNS #
    K11597
    K21590
    K41545
    K90941
    K90901
    K92460
    Class 2 / UNS #
    K11572
    ----
    ----
    ----
    ----
    ----
    Class 3 / UNS #
    K11572
    K21590
    ----
    ----
    ----
    ----
     
    Cast Alloy Steel Valves
    A217
    A217
    A217
    A217
    A217
    ----
    Grade
    WC6
    WC9
    C5
    C12
    C12A
    ----
    UNS #
    J12072
    J21890
    J42045
    J82090
    J84090
    ----
     
    Chrome Alloy Plate
    A387
    A387
    A387
    A387
    A387
    A387
    Grade
    11
    22
    5
    9
    91
    ----
    Class 1 / UNS #
    K11789
    K21590
    S50200
    K90941
    ----
    ----
    Class 2 / UNS #
    K11789
    K21590
    S50200
    K90941
    K90901
    ----
     
    Chrome Alloy Bar
    A182
    A182
    A182
    A182
    A182
    A182
    Grade
    F11
    F22
    F5
    F9
    F91
    ----
    UNS #
    ----
    ----
    ----
    ----
    ----
    ----
Information provided in this page is in accordance with the 2013 Edition of the ANNUAL BOOK OF ASTM STANDARDS
Refer to ASME B & PV Section II for non-identical A/SA requirements