Alloy Steel Astm A335 P9 Alloy Pipe

Product Overview

ASTM A335 P9 is a chromium-molybdenum alloy steel seamless pipe grade designed for high-pressure and high-temperature applications. The chromium content improves oxidation and corrosion resistance, while molybdenum enhances creep strength and mechanical stability at elevated temperatures.

Applications

• Petrochemical industry
• Chemical processing plants
• Oil and gas industry
• Engineering and industrial piping systems
• Power generation and boiler systems

Key Features

• Excellent creep strength at elevated temperatures
• High oxidation and corrosion resistance
• Smooth surface finish
• Available in a wide range of sizes, schedules, and forms
• Custom sizes and wall thicknesses available on request

Standards & Type

• Standards: ASTM A335, ASME SA335
• Type: Seamless
• Specialization: Large diameter sizes (as specified)

Size Range & Dimensions

• Nominal size: 1/8 NB to 24 NB
• Outside diameter: 19.05 mm – 114.3 mm
• Wall thickness: 2.0 mm – 14 mm
• Schedule range: Schedule 20 to Schedule XXS (heavier on request, up to 250 mm thickness as stated)
• Length options: Single Random, Double Random, Cut Length
• Maximum length: 16000 mm

Forms & Pipe Ends

• Forms: Round, Square, Rectangular, Hydraulic
• Ends: Plain End, Beveled End, Threaded

Packing & Delivery

• Individually wrapped by hand to protect surface quality
• Plywood cases or pallet packaging recommended for safe transport
• Suitable for sea and road transportation

Marking & Traceability

• Pipes marked with heat number, size, material grade, and part number
• Identification printed along the length of each supplied pipe

Chemical Composition (%)

Element	Value
Carbon (C)	0.015 max
Manganese (Mn)	0.30 – 0.60
Phosphorus (P)	0.025 max
Sulfur (S)	0.025 max
Silicon (Si)	0.50 max
Chromium (Cr)	4.00 – 6.00
Molybdenum (Mo)	0.45 – 0.65

Mechanical Properties

Property	Value
Tensile Strength (min)	415 MPa
Yield Strength (min)	205 MPa
Elongation (min)	30%