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ASTM A335 P91 High Pressure Boiler Tube Alloy Steel 56'' OD 1422 X 100mm Size

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ASTM A335 P91 High Pressure Boiler Tube Alloy Steel 56'' OD 1422 X 100mm Size

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Brand Name :	NEW FORCE
Model Number :	56''
Certification :	MTC
Payment Terms :	L/C, T/T
Supply Ability :	200000 tons per month
Delivery Time :	5~10 weeks

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ASTM A335 P91 High Pressure Boiler Tube Alloy Steel 56'' OD 1422 X 100mm Size

ASTM A335 P91 High Pressure Boiler Tube Alloy Steel 56'' OD 1422 X 100mm Size

Grade 91 contains 9 % Chromium and 1 % Molybdenum compared to 2.5 % Chromium in the next best P22 grade. Chromium improves high temperature strength and increases oxidation resistance. Molybdenum increases the creep resistance. Also present are smaller quantities of Nickel and Manganese which increase the hardenability of the steel.

More important than the alloying elements is the formation of this alloy steel. The steel is formed by normalizing at 1050 °C, air cooling down to 200 °C. It is then tempered by heating to 760 °C. The temperatures and the cooling rates are very important. This produces the microstructure that results in the high creep strength properties.

1. Standards

ASTM A106 ——Standard Specification for Seamless Carbon Steel Pipe for High-Temperature Service

ASTM A335 ——Standard Specification for Seamless Ferritic Alloy-Steel Pipe for High-Temperature Service

2. Application

For the high-pressure boiler and steam pipes, and the petrochemical industry pipes;
Power plant; Chemical Fertilizer; Petrochemicals; Offshore Oils; Gas Productions; Refineries and etc.

3. Steel pipes No. of main production:

ASTM A335 Grade P5, P9, P11, P12, P22, P91, P92

ASTM A106 Grade B, C

4. Dimensional Tolerance

Pipe types	OD (mm)	Tolerance	WT (mm)	Tolerance
High Pressure Boiler Tube	219~457	±1.0％	≤20	-10% ~ +12.5%
	219~457	±1.0％	20~40	-10% +10%
	457~1422	±0.9％	＞40~70	-7％, +9％
	457~1422	±0.9％	＞70~20	-6％, +8％

5. Chemical Composition:

High Pressure Boiler Tube Chemical Requirements
Standard	Grade	UNS Designation	Composition, %
Standard	Grade	UNS Designation	C	Mn	P	S	Si	Cr	Mo	Ni	V	Others
ASTM A335	P5	K41545	0.15max	0.30-0.60	0.025	0.025	0.50max	4.00-6.00	0.45-0.65			...
	P9	S50400	0.15max	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			...
	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			...
	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	0.4	0.18-0.25	N 0.030-0.070
												Al 0.02max
												Cb 0.06-0.10
												Ti 0.01 max
												Zr 0.01max
	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	0.4	0.15-0.25	N 0.03-0.07
												Al 0.02 max
												Cb 0.04-0.09
												W 1.5-2.00
												B 0.001-0.006
												Ti 0.01 max
												Zr 0.01 max
ASTM A106	Grade B		0.3	0.29–1.06	0.035	0.035	0.1	0.4	0.15	0.4	0.08
ASTM A106	Grade C		0.35	0.29–1.06	0.035	0.035	0.1	0.4	0.15	0.4	0.08

6. Mechanical Properties

Standards	Steel pipes No.	Tensile strength	Yield strength	Elongation	Impact energy	Hardness
Standards	Steel pipes No.	(Mpa)	(Mpa)	(%)	(J)	Hardness
ASTM A335	P5	≥415	≥205	≥22	≥35	≤187HB
	P9	≥415	≥205	≥22	≥35
	P11	≥415	≥205	≥22	≥35	≤163HB
	P12	≥415	≥220	≥22	≥35	≤163HB
	P22	≥415	≥205	≥22	≥35	≤163HB
	P91	585～760	≥415	≥20	≥35	≤250HB
	P92	≥620	≥440	≥20	≥35	≤250HB
ASTM A106	Grade B	≥415	≥240	≥22	≥35	/
ASTM A106	Grade C	≥485	≥275	≥20	≥35	/

7. Available Size Range:

OD		Thickness
mm	inch	mm	SCH
88.9~1422	3''~ 56''	2.11~140	≥SCH10
*If the steel grades and size you are looking for are not listed above, please contact us for further information.

ASTM A335 P91 High Pressure Boiler Tube Alloy Steel 56'' OD 1422 X 100mm Size

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ASTM A335 P91 High Pressure Boiler Tube Alloy Steel 56'' OD 1422 X 100mm Size