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Standard: ASME SA 335  American society of mechanical engineers; ASTM A335M American society for Testing and Materials
Uses: For manufacture wall panel, economizer, reheater, superheater and steam pipeline of boilers.

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Description

Chemical Composition(%):

Grade UNS Designation Composition, %
Carbon Manganese Phosphorus, Sulfur Silicon  Chromium Molybdenum Others
max max
P1 K11522 0.10–0.20 0.30–0.80 0.025 0.025 0.10–0.50 0.44–0.65
P2 K11547 0.10–0.20 0.30–0.61 0.025 0.025 0.10–0.30 0.50–0.81 0.44–0.65
P5 K41545 0.15 max 0.30–0.60 0.025 0.025 0.50 max 4.00–6.00 0.45–0.65
P9 S50400 0.15 max 0.30–0.60 0.025 0.025 0.25–1.00 8.00–10.00 0.90–1.10
P11 K11597 0.05–0.15 0.30–0.60 0.025 0.025 0.50–1.00 1.00–1.50 0.44–0.65
P12 K11562 0.05–0.15 0.30–0.61 0.025 0.025 0.50 max 0.80–1.25 0.44–0.65
P15 K11578 0.05–0.15 0.30–0.60 0.025 0.025  1.15–1.65 0.44–0.65
P21 K31545 0.05–0.15 0.30–0.60 0.025 0.025 0.50 max 2.65–3.35 0.80–1.06
P22 K21590 0.05–0.15 0.30–0.60 0.025 0.025 0.50 max 1.90–2.60 0.87–1.13
P23 K41650 0.04–0.10 0.10–0.60 0.03 0.01 0.50 max 1.90–2.60 0.05–0.30 V 0.20–0.30
Cb 0.02–0.08
B 0.0005–0.006
N 0.030 max
Al 0.030 max
W 1.45–1.75
P91 K91560 0.08–0.12 0.30–0.60 0.02 0.01 0.20–0.50 8.00–9.50 0.85–1.05 V 0.18–0.25
N 0.030–0.070
Ni 0.40 max
Al 0.04 max
Cb 0.06–0.10
P92 K92460 0.07–0.13 0.30–0.60 0.02 0.01 0.50 max 8.50–9.50 0.30–0.60 V 0.15–0.25
N 0.03–0.07
Ni 0.40 max
Al 0.04 max
Cb 0.04–0.09
W 1.5–2.00
B 0.001–0.006