Manufacturer, Supplier & Exporter of ASTM A335 P2 Spool

ASTM A335 P2 spools are seamless alloy-steel tubes specifically engineered for high-temperature service under pressure. The “P2” grade belongs to the ferritic chromium-molybdenum steels of the A335 family, combining elevated strength with good creep resistance. Given these characteristics, P2 is commonly used in steam lines, superheaters, reheaters, and high-temperature industrial piping systems..

In terms of manufacturing and supply, a company like Riddhi Siddhi Impex can play a crucial role in the Indian market. While global mills produce A335 P2 spools, Riddhi Siddhi Impex would act as a stockist and distributor, importing these critical components and maintaining inventory to cater to domestic demand. Their logistical presence in major Indian industrial hubs—such as Mumbai, Delhi, Bengaluru, Hyderabad, Chennai, Kolkata, Pune, Ahmedabad, Surat, and Vadodara—would make high-temperature alloy tubing more accessible and reduce lead times for project engineers..

ASTM A335 P2 spools are high-quality seamless alloy steel pipes designed for use in high-temperature and high-pressure applications. The P2 grade, part of the A335 series, is a ferritic chromium-molybdenum steel known for excellent creep strength, good toughness, and high-temperature durability. These characteristics make it suitable for superheater lines, reheaters, boilers, and power plant piping systems, where reliability under extreme conditions is essential..

Manufactured by reputed companies, these spools are typically produced under strict quality control measures, ensuring dimensional accuracy, uniform chemical composition, and consistent mechanical properties. A supplier like Riddhi Siddhi Impex specializes in sourcing and distributing ASTM A335 P2 spools to the Indian market, maintaining stocks to meet industrial demand efficiently. Their supply network ensures availability across major industrial hubs such as Mumbai, Delhi, Bengaluru, Hyderabad, Chennai, Kolkata, Pune, and Ahmedabad..

Chemically, the A335 P2 alloy is carefully formulated to balance strength and high-temperature performance. It contains carbon between 0.10–0.20%, manganese 0.30–0.61%, phosphorus and sulfur ≤0.025%, silicon 0.10–0.30%, chromium 0.50–0.81%, and molybdenum 0.44–0.65%. This chemical composition gives the spools resistance to oxidation, thermal fatigue, and stress under long-term high-temperature service..

ASTM A335 P2 Spools

Specification

Product Name	ASTM A335 P2 Spools
Manufacturer	Riddhi Siddhi Impex
Base Material	Alloy Steel (Chromium-Molybdenum)
Form	Seamless Tube / Spool
Standard	ASTM A335 / ASME SA335
Size Range	1/8" to 30" NB
Wall Thickness	SCH 20, 40, 80, 160, XS, XXS
Length	Random or Cut to Size
Pipe Ends	Plain End (PE) / Beveled End (BE)
Applications	Boilers, Heat Exchangers, Superheater Lines, Reheaters, Power Plant Piping

Chemical Composition

Element	Content (%)
Carbon (C)	0.10 – 0.20
Manganese (Mn)	0.30 – 0.61
Phosphorus (P)	≤0.025
Sulfur (S)	≤0.025
Silicon (Si)	0.10 – 0.30
Chromium (Cr)	0.50 – 0.81
Molybdenum (Mo)	0.44 – 0.65

Mechanical Properties

Property	Value
Yield Strength	≥ 205 MPa
Tensile Strength	380 – 415 MPa
Elongation	≈ 30%
Impact Test	Optional / As per Requirement

Dimension Chart (Nominal)

Nominal Pipe Size (NB)	Outside Diameter (mm)	Wall Thickness (mm)	Length
10.2	10.2	1.6 – 4.0	Random / Cut to Size
50	50	2.5 – 8.0	Random / Cut to Size
114.3	114.3	6.0 – 12.7	Random / Cut to Size
273.1	273.1	9.27 – 25.4	Random / Cut to Size
406.4	406.4	12.7 – 32.0	Random / Cut to Size
711	711	25 – 100	Random / Cut to Size

Equivalent Grades

Standard	Equivalent Grade
EN	P2 / 13CrMo4-5
DIN	13CrMo4-5
BS	1509 P2
ASTM	A335 P2 (Same)

Equivalent Standards

Standard	Description
ASTM A335	Seamless Ferritic Alloy Steel Pipe for High Temperature Service
ASME SA335	Pressure Piping Standard for Alloy Steel
DIN 17175	Seamless Steel Tubes for Pressure Boilers

Other Types of ASTM A335 Alloy Pipes

Type	Description
P1	Lower alloy steel for moderate temperature service
P5	High-strength alloy steel for elevated temperature applications
P9	Chromium-molybdenum steel for high-pressure, high-temperature service
P11	High-temperature alloy steel suitable for boilers and power plants

ASTM A335 P2 spools are often cross-referenced to ASME SA335 P2 standards and are comparable to other chromium-molybdenum steels globally. Related grades in the A335 series, such as P1, P5, P9, and P11, provide options for different temperature and pressure ratings. The P2 grade strikes a balance between moderate chromium content, high-temperature strength, and cost-efficiency, making it ideal for power generation and petrochemical applications in India..

Frequently Asked Questions (FAQs)

Q1: What are the typical applications of ASTM A335 P2 Spools?

A1: They are widely used in boilers, superheaters, reheaters, heat exchangers, and power plant piping systems where high-temperature performance is critical.

Q2: Can ASTM A335 P2 Spools be supplied in custom lengths and diameters?

A2: Yes, Riddhi Siddhi Impex provides spools in random lengths or cut-to-size dimensions with various nominal diameters and wall thicknesses.

Q3: Are ASTM A335 P2 Spools available across India?

A3: Yes, they are supplied in major industrial cities including Mumbai, Delhi, Bengaluru, Hyderabad, Chennai, Kolkata, Pune, Ahmedabad, Surat, Vadodara, Rajkot, Nagpur, Indore, Bhopal, Jaipur, and more.

Q4: What is the chemical composition of ASTM A335 P2?

A4: It contains 0.10–0.20% C, 0.30–0.61% Mn, ≤0.025% P & S, 0.10–0.30% Si, 0.50–0.81% Cr, and 0.44–0.65% Mo, providing excellent high-temperature strength.