ASTM A335 P5 Seamless Pipes Supplier and Manufacturer in India

Q: What is the difference between ASTM A335 P5 and P9?

Grade P5 contains 4 to 6 percent Cr. Grade P9 contains 8 to 10 percent Cr. P9 is selected for applications requiring higher oxidation resistance above the P5 service temperature ceiling.

Q: Is post-weld heat treatment (PWHT) mandatory for A335 P5 pipes?

Yes. PWHT is mandatory for most P5 weld joints per ASME B31.1 and B31.3 to relieve residual stress and restore toughness in the heat-affected zone.

ASTM A335 and ASME SA335 Grade P5 Chrome Moly Seamless Pipes - Certified Manufacturer and Exporter, Mumbai India

ASTM A335 P5 seamless pipes, also specified as ASME SA335 Grade P5, are ferritic chrome-moly alloy steel pipes designed for high-temperature and high-pressure service. With a controlled composition of 4.00 to 6.00 percent chromium and 0.45 to 0.65 percent molybdenum, Grade P5 delivers superior creep resistance, oxidation resistance, and long-term mechanical integrity at service temperatures up to 593 degrees C (1100 degrees F). These pipes are widely used in petroleum refineries, petrochemical plants, thermal power stations, and heat exchanger systems where standard carbon steel fails under heat and pressure. Solitaire Overseas supplies ASTM A335 P5 seamless pipes in a full range of sizes from 1/8 inch NB to 26 inch NB, across all standard schedules from SCH 20 through XXS, and in various end configurations, with EN 10204 3.1 Mill Test Certificates, NABL approved lab reports, IBR compliance, and export delivery to 60 countries from our Mumbai warehouse.

Manufacturing of Alloy Steel P5 Pipes

We manufacture ASTM A335 P5 seamless pipes using hot-rolling and cold-drawing processes, with heat treatment performed to ASTM A335 specification requirements, including normalize and temper or full anneal conditions. Custom sizes, cut-to-length, and special wall schedules are available on request.

Quality Assurance and Packing

Strict quality testing is performed on each product before dispatch. Test documents supplied include NABL approved lab reports, destructive and non-destructive test reports, chemical reports, mechanical reports, third-party inspection reports, and visual inspection reports. Certifications available include EN 10204 3.1 Mill Test Certificate, IBR, ISO 9001, NACE MR0175, and PED.

All ASTM A335 P5 seamless pipes are packed in wooden crates or plywood boxes, secured with steel straps, and individually wrapped in HDPE or bubble wrap to prevent oxidation and transit damage. Bundle ends are marked with order number, heat number, pipe dimensions, and bundle weight.

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Specification of ASTM A335 P5 Chrome Moly Seamless Pipes
ASTM A335 P5 Seamless Pipe Size, Schedule and Weight Chart
Equivalent Grades for ASTM A335 P5 Pipes
ASTM A335 P5 vs P9 — Grade Comparison
Chemical Composition of ASTM A335 Grade P5 Pipes
Mechanical and Physical Properties of ASTM A335 P5 Seamless Pipes
Heat Treatment Conditions for ASTM A335 Grade P5 Chrome Moly Pipes
Applications of ASTM A335 P5 Chrome Moly Seamless Pipes
Related Standards for ASTM A335 P5 Piping Systems
Frequently Asked Questions — ASTM A335 P5 Seamless Pipes
Related Products

Specification of ASTM A335 P5 Chrome Moly Seamless Pipes

Standard	ASTM A335 / ASME SA335
Dimensions	ASTM, ASME and API
Pipe Size (NB)	1/8 NB to 26 NB
Outer Diameter	6 mm to 2500 mm
Thickness	0.3 mm to 25 mm (0.095 inch to 1.000 inch) per ASTM A335 nominal wall range
Schedule	SCH 20, SCH 30, SCH 40, STD, SCH 80, XS, SCH 60, SCH 80, SCH 120, SCH 140, SCH 160, XXS
Types	Seamless
End	Plain End, Beveled End, Threaded
Length	Single Random, Double Random and Required Length
Form	Seamless Pipe
Heat Treatment	Normalized and Tempered / Full Annealed / Isothermal Annealed
Hardness	197 HB max (per ASTM A335 P5 specification)
Density	7.80 g/cm3
Max Service Temperature	593 degrees C (1100 degrees F) continuous service

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ASTM A335 P5 Seamless Pipe Size, Schedule and Weight Chart

Our ASTM A312 SMLS pipes and ASME SA312 seamless pipes are available in the following configurations:

NPS (Inch)	OD (mm)	Schedule	Wall Thickness (mm)	Weight (kg/m)
2"	60.3	SCH 40	3.91	5.44
2"	60.3	SCH 80	5.54	7.48
2"	60.3	SCH 160	8.74	11.1
3"	88.9	SCH 40	5.49	11.29
3"	88.9	SCH 80	7.62	15.27
3"	88.9	SCH 160	11.13	21.35
4"	114.3	SCH 40	6.02	16.07
4"	114.3	SCH 80	8.56	22.32
4"	114.3	SCH 160	13.49	33.54
6"	168.3	SCH 40	7.11	28.26
6"	168.3	SCH 80	10.97	42.56
6"	168.3	SCH 160	18.26	68.00
8"	219.1	SCH 40	8.18	42.55
8"	219.1	SCH 80	12.70	63.98
8"	219.1	SCH 160	23.01	109.90

Equivalent Grades for ASTM A335 P5 Pipes

Standard	Grade Designation
ASTM / ASME (UNS)	P5 / K41545
Werkstoff Nr.	1.7362
EN / DIN	P235GH
JIS	STPA25

ASTM A335 P5 vs P9 — Grade Comparison

Property	Grade P5	Grade P9
Chromium	4.00 to 6.00%	8.00 to 10.00%
Molybdenum	0.45 to 0.65%	0.90 to 1.10%
Tensile Strength	415 MPa min	415 MPa min
Yield Strength	205 MPa min	205 MPa min
Max Service Temp	Up to approx. 593 degrees C	Above 593 degrees C (higher oxidation resistance)
Primary Use	Refinery transfer lines, HDS piping, boiler tubes	Higher-temperature refinery and petrochemical service where greater Cr content is required

Grade P5 is the standard selection for high-temperature petroleum refinery piping up to approximately 593 degrees C. Grade P9 is specified where higher chromium content and greater oxidation resistance are required above that service threshold. Contact us to discuss which grade suits your operating conditions.

Chemical Composition of ASTM A335 Grade P5 Pipes (UNS K41545)

The table below outlines the essential physical performance metrics, including tensile and yield strength, ensuring the material meets the structural demands of high-pressure environments.

Element	Symbol	ASTM A335 P5 Range
Carbon	C	0.15% max
Manganese	Mn	0.30 to 0.60%
Phosphorus	P	0.025% max
Sulphur	S	0.025% max
Silicon	Si	0.50% max
Chromium	Cr	4.00 to 6.00%
Molybdenum	Mo	0.45 to 0.65%

Mechanical and Physical Properties of ASTM A335 P5 Seamless Pipes

Tensile Strength	415 MPa minimum
Yield Strength (0.2% Offset)	205 MPa minimum
Elongation	30% minimum
Hardness	197 HB max
Density	7.80 g/cm3
Melting Range	1425 degrees C to 1510 degrees C

Custom sizes, tight tolerances, and special finishes can be supplied on request.

Heat Treatment Conditions for ASTM A335 Grade P5 Chrome Moly Pipes

ASTM A335 P5 seamless pipes are furnished in the following heat-treated conditions as specified by the purchaser:

Full Annealed	Heated above the transformation temperature and slowly furnace-cooled to below the critical range.
Isothermal Annealed	Cooled to and held at a controlled sub-critical temperature, then air-cooled.
Normalized and Tempered	Air-cooled from the austenitising temperature, then reheated to a minimum of 675 degrees C.
Subcritical Annealed	Heated to a minimum of 675 degrees C and air-cooled (applicable for P5b and P5c sub-grades).

All heat-treated pipes are tested per ASTM A335 tensile and hardness requirements. Specify your required heat treatment condition at time of order.

Applications of ASTM A335 P5 Chrome Moly Seamless Pipes

Petroleum Refineries: FCCU risers, transfer lines, hydrodesulfurisation (HDS) reactor piping
Petrochemical Plants: High-temperature process piping, coker heater tubes, vacuum distillation transfer lines
Thermal Power Plants: Boiler tubes, superheater tubes, reheater tubes, high-pressure steam lines
Heat Exchangers: Shell and tube configurations in elevated-temperature service
Oil and Gas Industry: High-temperature and high-pressure process lines
Chemical Industry: Corrosion-resistant process piping at elevated temperatures
Paper and Pulp Industry: High-temperature process and steam piping
Fabrication Industry: Structural and pressure-containing fabrications requiring high-temperature alloy
General Purpose: High-temperature applications where standard carbon steel is insufficient
Heating Systems: High-temperature process heating and steam distribution

Related Standards for ASTM A335 P5 Piping Systems

When specifying an ASTM A335 P5 piping system, the following companion standards apply:

ASTM A234 WP5	Seamless and welded butt-weld pipe fittings including elbows, tees, reducers, and caps for high-temperature service
ASTM A182 F5	Forged flanges and fittings for high-temperature service in P5 piping systems
ASTM A387 Gr 5	Chrome-moly alloy steel plates for pressure vessel fabrication using P5 composition
ASTM A691 5CR	Welded chrome-moly alloy steel pipe, the corresponding welded product form to A335 P5

Solitaire Overseas can supply ASTM A335 P5 seamless pipe alongside A234 WP5 fittings and A182 F5 flanges for complete piping system packages. Contact our technical team to discuss your project requirements.

Get ASTM A335 P5 Pipe Prices with Full Certification from Mumbai, India

ASTM A335 and ASME SA335 P5 seamless pipes with EN 10204 3.1 MTC, NABL lab reports, and IBR certification, delivered to your site from our Mumbai warehouse.

Frequently Asked Questions — ASTM A335 P5 Seamless Pipes

What is the chromium content of ASTM A335 Grade P5 pipe?

ASTM A335 P5 contains 4.00 to 6.00 percent chromium and 0.45 to 0.65 percent molybdenum. This composition delivers strong oxidation resistance and creep strength at elevated service temperatures up to 593°C.

What is the maximum operating temperature for P5 chrome moly seamless pipe?

ASTM A335 P5 is rated for continuous high-temperature service up to approximately 593°C (1100°F). It is widely used in petroleum refineries, petrochemical plants, and thermal power stations.

What heat treatment condition is required for ASTM A335 P5?

P5 pipes are supplied normalized and tempered, full annealed, or isothermal annealed, as specified by the purchaser at the time of order. Subcritical annealing also applies for P5b and P5c sub-grades.

What is the difference between ASTM A335 P5 and P9?

Grade P5 contains 4 to 6 percent chromium, while Grade P9 contains 8 to 10 percent chromium. P5 is commonly selected for refinery piping up to 593°C, whereas P9 is preferred where higher oxidation resistance is required.

Is post-weld heat treatment (PWHT) mandatory for A335 P5 pipes?

Yes. PWHT is mandatory for most P5 weld joints under ASME B31.1 and B31.3 to relieve residual stress and restore toughness in the heat-affected zone.

What test certificates are available for ASME SA335 P5 seamless pipes?

Solitaire Overseas supplies EN 10204 3.1 Mill Test Certificates as standard. IBR certificates, NACE MR0175 compliance reports, and third-party inspection by BV, SGS, or TÜV are available on request.

What schedules are available for ASTM A335 P5 seamless pipes?

We supply ASTM A335 P5 seamless pipes in all standard schedules from SCH 20 through SCH XXS, covering nominal bore sizes from 1/8 inch NB to 26 inch NB. Cut-to-length and special wall thicknesses are available on order.

Which mills supply ASTM A335 P5 seamless pipes stocked by Solitaire Overseas?

We source ASTM A335 P5 seamless pipes from approved Indian mills including Jindal, ISMT, and MSL. All material is supplied with EN 10204 3.1 Mill Test Certificates traceable to the originating heat.