ISO 9001:2008 Registered
Hunan Standard Steel Co.,Ltd is as the one of member of Husteel Industry Group, as the professional manufacturer of steel pipe and pipe fittings,which has a complete system of production and sales serving our customers. 
Factory          Group
  

Specifications Range
Out Diameter 1/4"- 48"
Wall Thickness Schedules 40 through 160, STD, XS, XXS.

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.

Grade
UNS Designation
Composition, %
Carbon
Manganese
hosphorus (max)
Sulfur (max)
Silicon
Chromium
Molybdenum
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
0.44–0.65
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
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
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