Grade A369 FP91 Type 1
Corresponding Standard ASTM A369/A369M-2024
Standard Specification for Carbon and Ferritic Alloy Steel Forged and Bored Pipe for High-Temperature Service
Classification Alloy Steel
A369 FP91 Type 1 Chemical Element Composition Content (%)
Component C Si Mn P S Cr Ni Mo N Ti V Nb Zr Al
Minimum Value 0.08 0.2 0.3 - - 8 - 0.85 0.03 - 0.18 0.06 - -
Maximum Value 0.12 0.5 0.6 0.025 0.025 9.5 0.4 1.05 0.07 0.01 0.25 0.1 0.01 0.02
A369 FP91 Type 1 Mechanical Properties
Tensile Strength
σb
Mpa
Yield Point
σs
Mpa
Elongation or Extension Rate
δ
%
≥585 ≥415 l: ≥20
tr:≥13
* l: Longitudinal; tr:Transverse.

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