Manufacturer, Supplier & Exporter of ASTM A335 P5 Spool

ASTM A335 P5 spools are seamless alloy-steel tubes designed for high-temperature service. The “P5” grade refers to a chromium‑molybdenum alloy (typically around 5% Cr), which gives good resistance to oxidation, creep, and thermal fatigue. These spools are widely used in boilers, superheaters, reheaters, and pressure piping systems that must operate reliably at elevated temperatures. According to SEMetalGroup, A335 P5 is specifically for high-temperature, high-pressure environments...

A company like Riddhi Siddhi Impex, acting as a domestic stockist and supplier, would import ASTM A335 P5 spools from global mills and store them in local warehouses. This enables fast access for Indian industries such as power generation, petrochemicals, and boiler manufacturers. By maintaining inventory in major industrial hubs, Riddhi Siddhi Impex can reduce lead time and ensure clients in cities like Mumbai, Delhi, Bengaluru, Hyderabad, Chennai, and Kolkata can procure material quickly..

ASTM A335 P5 spools are high-temperature, high-pressure alloy steel tubes specifically designed for demanding industrial applications. These spools belong to the chromium-molybdenum alloy steel group, which provides excellent resistance to oxidation, creep, and thermal fatigue. The P5 grade is widely used in boiler systems, superheaters, reheaters, and industrial piping where temperatures and pressures are elevated. Its seamless construction ensures uniform mechanical properties and structural integrity, making it a preferred choice for critical piping systems..

Riddhi Siddhi Impex is a recognized domestic manufacturer and supplier of ASTM A335 P5 spools in India. They source high-quality materials from certified mills and maintain stock in strategic locations to ensure prompt supply. The seamless pipes are manufactured under strict ASTM A335 standards, ensuring compliance with chemical composition, mechanical properties, and dimensional accuracy. These spools undergo rigorous quality testing, including hydrostatic tests, ultrasonic inspections, and dimensional verification, to meet international standards...

ASTM A335 P5 spools supplied by Riddhi Siddhi Impex are accessible across major Indian cities including Mumbai, Delhi, Bengaluru, Hyderabad, Chennai, Kolkata, Pune, Ahmedabad, Surat, Vadodara, Rajkot, Nagpur, Indore, Bhopal, Jaipur, Kanpur, Lucknow, Agra, Varanasi, Amritsar, Chandigarh, Mysuru, Udaipur, Jodhpur, Visakhapatnam, Coimbatore, Madurai, Kochi, Thiruvananthapuram, Mangalore, Nashik, Kolhapur, Chandrapur, Akola, Vilayat, Somnath, Dahej, Ankleshwar, Navsari, Valsad, and Rajpipla. This widespread availability ensures reduced lead times and easier procurement for industries throughout the country.

ASTM A335 P5 Spools

Specification

Product Name	ASTM A335 P5 Spools
Manufacturer / Supplier	Riddhi Siddhi Impex
Material	Chromium-Molybdenum Alloy Steel
Form	Seamless Tube / Spool
Standard	ASTM A335 / ASME SA335
OD Range	10 mm to 711 mm
Wall Thickness	1.6 mm to 100 mm
Length	Random or Cut to Size
Pipe Ends	Plain End (PE) / Beveled End (BE)
Applications	Boilers, Heat Exchangers, Superheaters, Reheaters, High-temperature Piping Systems

Chemical Composition (%)

Element	Content (%)
Carbon (C)	≤ 0.15
Manganese (Mn)	0.30 – 0.60
Silicon (Si)	≤ 0.50
Chromium (Cr)	4.00 – 6.00
Molybdenum (Mo)	0.45 – 0.65
Phosphorus (P)	≤ 0.025
Sulfur (S)	≤ 0.025

Mechanical Properties

Property	Value
Yield Strength	205 MPa (min)
Tensile Strength	415 MPa (min)
Elongation	≥ 30%
Impact Test	As per ASTM A335 requirement

Dimension Chart (Nominal)

Nominal Pipe Size (NB)	Outside Diameter (mm)	Wall Thickness (mm)	Length
10	10	1.6 – 4	Random / Cut to Size
50	50	2.5 – 8	Random / Cut to Size
114	114.3	6 – 12.7	Random / Cut to Size
273	273.1	9.27 – 25.4	Random / Cut to Size
406	406.4	12.7 – 32	Random / Cut to Size
711	711	25 – 100	Random / Cut to Size

Equivalent Grades

Standard	Equivalent Grade
EN	13CrMo4-5
DIN	13CrMo4-5 / 1.7335
BS	150M11 / 165M11
ASTM	A335 P5 (Same)

Equivalent Standards

Standard	Description
ASTM A335	Seamless Ferritic Alloy-Steel Pipe for High-Temperature Service
ASME SA335	Seamless Alloy Steel Pipe for Boiler and Pressure Applications
DIN 17175	Seamless Steel Tubes for Pressure Purposes

Other Types

Type	Description
P1	Low alloy steel for lower temperature applications
P2	Chromium-molybdenum steel for moderate temperature service
P5	Chromium-molybdenum steel for high-temperature service
P9	High chromium-molybdenum alloy for very high temperature service

The chemical composition of ASTM A335 P5 is carefully controlled to achieve high-temperature strength and durability. Typical composition includes Carbon (C) ≤ 0.15%, Manganese (Mn) 0.30–0.60%, Silicon (Si) ≤ 0.50%, Chromium (Cr) 4.00–6.00%, and Molybdenum (Mo) 0.45–0.65%. Phosphorus (P) and Sulfur (S) are limited to ≤ 0.025% each to maintain toughness and prevent brittleness. This composition ensures resistance to scaling, oxidation, and creep deformation at elevated temperatures.

Frequently Asked Questions (FAQs)

Q1: What are the main applications of ASTM A335 P5 Spools?

A1: They are used in superheaters, reheaters, boilers, power plants, petrochemical plants, and high-temperature piping systems.

Q2: Are custom sizes and lengths available?

A2: Yes, Riddhi Siddhi Impex provides ASTM A335 P5 spools in custom lengths and diameters as per client specifications.

Q3: What cities in India are covered for supply?

A3: Spools are supplied across Mumbai, Delhi, Bengaluru, Hyderabad, Chennai, Kolkata, Pune, Ahmedabad, Surat, Vadodara, and other major cities.

Q4: How is quality ensured?

A4: Each spool undergoes chemical, mechanical, and dimensional testing according to ASTM A335 standards, including hydrostatic and non-destructive inspections.