Seamless Steel Pipe ASTM A335

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