ASTM A 335/A 335M P9 alloy chrome-moly pipe.

CHEMTECH ALLOYS PVT LTD is biggest stockist, suppliers and exporters of ASTM A335 P9 9-Chrome  S50400 A335/SA335 A369/SA369 seamless welded pipes in India, Japan, Europe, South Korea, Singapore, Dubai-Middle East, UAE.

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ASTM A335 Seamless Ferritic Alloy Steel Pipe for High-Temperature Service. ASTM A335 standard is issued under the fixed designation A 335/A 335M; the number immediately following the designation indicates the year of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last pre approvals. A superscript Epsilon ( ュ) indicates an editorial change since the last revision or pre approvals.

This specification covers seamless ferritic alloy-steel pipe for high-temperature service. The pipe shall be suitable for bending, flanging, and similar forming operations, and for fusion welding. The steel material shall conform to chemical composition, tensile property,  and hardness requirements. Each length of pipe shall be subjected to the hydrostatic test. Also, each pipe shall be examined by a non-destructive examination method
in accordance with the required practices. The range of pipe sizes that may be examined by each method shall be subjected to the limitations in the scope of the respective practices. The different mechanical test requirements for pipes, namely, transverse or longitudinal tension test, flattening test, and hardness or bend test are presented.

ASTM A335

Alloy Pipe Grades

ASTM A335 P2 alloy chrome-moly pipe.
ASTM A335 P5 alloy chrome-moly pipe.
ASTM A335 P9 alloy chrome-moly pipe.
ASTM A335 P11 alloy chrome-moly pipe.
ASTM A335 P22 alloy chrome-moly pipe.
ASTM A335 P91 alloy  chrome-moly pipe.
ASTM A335 P92 alloy chrome-moly pipe.

Origin.

Europe
Japan
South Korea

Sizes Range.

NPS 1/4” to NPS 24”
Wall Thickness – Schedules 40 through 160, STD, XS, XXS.
Unscheduled heavy wall pipe thicknesses available up to 4 inches.

It also enhances the corrosion resistance of steel and inhibits pitting. Chromium (or chrome) is the essential constituent of stainless steel. Any steel with 12% or more Chrome is considered stainless. Chrome is virtually irreplaceable in resisting oxidation at elevated temperatures. Chrome raises the tensile, yield, and hardness at room temperatures. The composition chrome moly alloy steel pipe make it ideal for use in power plants, refineries, petro chemical plants, and oil field services where fluids and gases are transported at extremely high temperatures and pressures.

Material Trade Name.

Trade Name 
Grade
UNS #
Pipe
Forged / Bored Pipe*
1 1/4 Chrome 
P11
K11597
A335 / SA335
A369 / SA369
2 1/4 Chrome 
P22
K21590
A335 / SA335
A369 / SA369
5 Chrome 
P5
K41545
A335 / SA335
A369 / SA369
9 Chrome 
P9
S50400
A335 / SA335
A369 / SA369
P91
P91
K91560
A335 / SA335
A369 / SA369
P92
P92
K92460
A335 / SA335
A369 / SA369

Testing Services.

When every measurement requires the highest level of precision—we leave nothing to chance.

Critical applications demand highly accurate measurements and very tight tolerances. So we maintain a range of in-house lab testing services and a close network of trusted testing contractors to provide the measurements and assurance you need. It’s just one way we help ensure the highest level of precision in all of our products—and all without slowing your projects down.

Non-Destructive
Destructive
Ultrasonic Testing (UT)
Hydro-Testing
Positive Material Identification (PMI)
X-Ray, Magnetic Particle (MP)
Liquid Penetrant (LP)
Chemical Analysis
Mechanical Testing
Flattening & Bend Tests
Photomicrographs
Metallography
Impact Testing
Hardness Testing

Material Specification

MATERIAL SPECIFICATION
ASTM ASME
CHROME- MOLY ALLOY STEEL PIPE
NOMINAL WALL
SEAMLESS
A335 Grade P5
5% Chrome;
½% Moly
SA335 Grade P5
5% Chrome;
½% Moly
CHROME- MOLY ALLOY STEEL PIPE
NOMINAL WALL
SEAMLESS
A335 Grade P9
9% Chrome;
1% Moly
SA335 Grade P9
9% Chrome;
1% Moly
CHROME- MOLY ALLOY STEEL PIPE
NOMINAL WALL
SEAMLESS
A335 Grade P11
1-1/4% Chrome;
½% Moly
SA335 Grade
P11 1-1/4%
Chrome; ½%
Moly
CHROME- MOLY ALLOY STEEL PIPE
NOMINAL WALL
SEAMLESS
A335 Grade P22
2-1/4% Chrome;
1% Moly
SA335 Grade
P22 2-1/4%
Chrome; 1%
Moly
CHROME- MOLY ALLOY STEEL PIPE
NOMINAL WALL
SEAMLESS
A335 Grade P91
9% Chrome;
1% Moly + trace
elements
SA335 P91 A335
9% Chrome;
1% Moly + trace
elements

Chemical Composition

Grade Carbon Manganese Phosphorous,max Sulfur, max Silicon Molybdenum
ASTM A335 P5 0.15max 0.30-0.60 0.025 0.025 0.50max 0.45-0.65
ASTM A335 P9 0.15max 0.30-0.60 0.025 0.025 0.25-1.00 0.90-1.10
ASTM A335 P11 0.05-0.15 0.30-0.60 0.025 0.025 0.50-1.00 0.44-0.65
ASTM A335 P22 0.05-0.15 0.30-0.60 0.025 0.025 0.50max 0.87-1.13
ASTM A335 P91 0.08-0.12 0.30-0.60 0.020 0.010 0.20-0.50 0.85-1.05
Zr 0.01 max V 0.18-0.25 N 0.03-0.07 Ni 0.40 max Al 0.02 max Cb
0.06-0.10
Ti 0.01 max

Tensile Requirements.

Tensile   Strength,
min., psi
P-5 P-9 P-11 P-22 P-91 P91 shall not have a hardness
not exceeding 250 HB/265 HV [25HRC].
ksi 60 60 60 60 85
MPa 415 415 415 415 585
Yield Strength, min., psi
ksi 30 30 30 30 60
MPa 205 205 205 205 415

Mechanical Properties.

Mechanical properties P1, P2 P12 P23 P91 P92, P11 P122
Tensile strength 380 415 510 585 620 620
Yield strength 205 220 400 415 440 400

APPROVED VENDERS MAKE & ORIGIN

ARAMCO ADMA-OPCO ADPC IPC
GASCO ADMA SAIPEM PDO
TOTAL OIEC IOOC NIOC
KOC ZADCO ADNOC SABIC
KNPC BP EIL IOCL

A335 is often called chrome moly pipe because of the chemical makeup of Molybdenum (Mo) and Chromium (Cr). Molybdenum increases the strength of steel as well as the elastic limit, resistance to wear, impact qualities, and hardenability. Moly increases the resistance to softening, restraints grain growth and makes chromium steel less susceptible to embrittlement. Moly is the most effective single additive that increases high temperature creep strength.

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