ASTM A335 P92 Seamless Ferritic Alloy-Steel Pipe
ASTM A335 P92 Seamless Ferritic Alloy-Steel Pipe for High-Temperature Service.has a 30% higher endurance strength at 600 ℃. In order to improve the thermal efficiency of modern coal-fired generating units, the generating units must be oper

Description

ASTM A335 P92 Seamless Ferritic Alloy-Steel Pipe

Standard:ASTM A335/A 335M
Standard Specification for Seamless Ferritic Alloy-Steel Pipe for High-Temperature Service

ASTM A335 P92 Seamless Ferritic Alloy-Steel Pipe for High-Temperature Service

P92 Steel
A335 P92 alloy tube, P92 material is American steel number ASTM A335 P92, which is martensitic heat-resistant steel.
92 steel is based on P91 steel, and the content of Mo element is appropriately reduced. At the same time, a certain amount of W is added to increase the molybdenum equivalent (Mo + 0.5W) of the material from 1% of P91 steel to about 1.5%. The steel is also added with a small amount of boron. After the above alloying improvement, compared with other commonly used heat-resistant steels of 9% Cr series, its high temperature corrosion resistance and oxidation resistance are similar, but the high temperature strength and creep performance are greatly improved. Improvement.

Compared with P91 steel, P92 steel has a 30% higher endurance strength at 600 ℃. In order to improve the thermal efficiency of modern coal-fired generating units, the generating units must be operated at higher temperature and pressure parameters, and a large number of P92 seamless steel pipes are required.

 

ASTM A335 P92 Seamless Alloy Steel Pipe Chemical Composition(%)

Grade C Mn P S Si Cr Mo V N Ni Al Nb W B
A335 P92 0.07-0.13 0.3-0.6 ≤0.02 ≤0.01 ≤0.5 8.5-9.5 00.3-0.6 0.15-0.25 0.03-0.07 ≤0.4 ≤0.04 0.04-0.09 1.5-2.0 0.001-0.006

ASTM A335 P92 Seamless Alloy Steel Pipe Mechanical & Physical Properties

Tensile Strength(MPa) Yield Strength(MPa) Elongation(%)
≥620 ≥440 ≥20

Size Tolerances of ASTM A335 P92 Alloy Steel Pipe

Tolerance Of Outside Diameter 

ASTM A450 Hot rolled Outside Diameter(mm) Tolerance(mm)
OD≤101.6 +0.4 / -0.8
101.6＜OD≤190.5 +0.4 / -1.2
190.5＜OD≤228.6 +0.4 / -1.6
Cold Drawn OD＜25.4 ±0.10
25.4≤OD≤38.1 ±0.15
38.1＜OD＜50.8 ±0.20
50.8≤OD＜63.5 ±0.25
63.5≤OD＜76.2 ±0.30
76.2≤OD≤101.6 ±0.38
101.6＜OD≤190.5 +0.38 / -0.64
190.5＜OD≤228.6 +0.38 / -1.14
ASTM A530,ASTM A335 NPS Outside Diameter(inch) Tolerance(mm)
1/8≤OD≤1-1/2 ±0.40
1-1/2＜OD≤4 ±0.79
4＜OD≤8 +1.59 / -0.79
8＜OD≤12 +2.38 / -0.79
12＜OD ±1%

Tolerance Of Wall Thickness

ASTM A450 Hot rolled Outside Diameter(mm) Tolerance(%)
OD≤101.6,WT≤2.4 +40 / -0
OD≤101.6,2.4＜WT≤3.8 +35 / -0
OD≤101.6,3.8＜WT≤4.6 +33 / -0
OD≤101.6,4.6＜WT +28 / -0
101.6＜OD,2.4＜WT≤3.8 +35 / -0
101.6＜OD,3.8＜WT≤4.6 +33 / -0
101.6＜OD,4.6＜WT +28 / -0
Cold Drawn OD≤38.1 +20 / -0
OD＞38.1 +22 / -0
ASTM A530 NPS Outside Diameter(inch) Tolerance(%)
1/8≤OD≤2-1/2 +22 / -12.5
3≤OD≤18,WT/OD≤5% +22.5 / -12.5
3≤OD≤18,WT/OD＞5% +15 / -12.5
20≤OD,WT/OD≤5% +22.5 / -12.5
20≤OD,WT/OD＞5% +15 / -12.5