Seamless Alloy Steel Pipe Introduction

Alloy pipe is a kind of seamless steel pipe. Alloy pipe is divided into structural seamless pipe and high-pressure heat-resistant alloy pipe. It is mainly different from the production standard and industry of alloy tubes. The mechanical properties of alloy tubes are changed by annealing and tempering. Achieve the required processing conditions. Its properties are higher than those of seamless steel tubes, which contain more Cr in the chemical composition of alloy tubes and have high temperature, low temperature and corrosion resistance. There is no alloy or very little alloy in seamless carbon pipe.
The reason why alloy pipe is widely used in petroleum, aerospace, chemical industry, electric power, boiler, military industry and other industries is that the mechanical properties of alloy pipe are well adjusted due to the variety of mechanical properties.
 
Application:   In Petroleum, Aerospace, Chemical, Power, Boilers, Military Industry
Size:  OD: 1/8'' ~ 26''
   WT: SCH 30, 30, 40, 60, 80, 120, 140, 160, XS, XXS, STD
   LENGTH: Single Random, Double Random, Cut Length max to 23m
Standard GB/T 3091 Q195/Q215/Q235/Q345, BS 1387, EN 39, EN 1139 S235JR/S275JR, ASTM A53 GR. A/B/C, JIS G3444 STK 400/STK 500
End Plain End, Beveled End, Thread End
Zinc Coating  10~50 g/m2
Packing Bundled with Hemp Rope/In Bulk

Specification

Product SEAMLESS / ERW / SAW ALLOY STEEL PIPE
Dimension 6 mm - 1080 mm
Thickness 1mm - 135 mm
Length 3 m - 12 m or according to the requirements of clients
Standard ASTM GB DIN
Steel grade A106/53/179/214/192/210 A/B/C
ST37.2/35.4/35.8/52/52.3/52.4/42/45
10# 20# 45#
P2, P12, P11, P22, P5, P9, P91 
T2, T11,T5,T9,T22, 4140, 12CrMo, 15CrMo, 12Cr2Mo, 1Cr5Mo, 2CrMo4, 1Cr9Mo, 
10CrMo910, etc.  
Trade terms FOB/CIF/CFR
Payment terms T/T, L/C
Delivery port Tianjin, China
Delivery time 10 or according to the real quantity of the tubes
   
Surface treatment Black painting
Varnish painting
3PE
Hot galvanized
or other coating according to your requirements
Bare tube
End of tubes Beveled, plain, thread, plastic caps
Inspection Ultrasonic examination, eddy inspection, hydrosttic testing etc.
Package Bundles, lossen or according to your requirements
Certificate API 5L/5CT, ISO, PED etc.
Application
Alloy steel seamless pipe is ideally suitable for chemical, petrochemicals and other energy-related applications. It has characteristics of high corrosion resistance and can be used in a wide range of industrial sectors.
- Chemical industries
- Petrochemical industries
- Energy-related applications

Chemical  Composition
C, % Mn, % P, % S, % Si, % Cr, % Mo, %
0.05-0.15 0.30-0.60 0.025 max 0.025 max 0.50-1.00 1.00-1.50 0.44-0.65
Yield Strength
Tensile Strength, MPa Yield Strength, MPa Elongation, %
415 min 205 min 30 min
Outside Diameter & Tolerance
ASTM A450 Hot rolled Outside Diameter, mm Tolerance, mm
OD≤101.6 +0.4/-0.8
101.6＜OD≤190.5 +0.4/-1.2
190.5＜OD≤228.6 +0.4/-1.6
Cold Drawn Outside Diameter, mm Tolerance, mm
OD＜25.4 ±0.10
25.4≤OD≤38.1 ±0.15
38.1＜OD＜50.8 ±0.20
50.8≤OD＜63.5 ±0.25
63.5≤OD＜76.2 ±0.30
76.2≤OD≤101.6 ±0.38
101.6＜OD≤190.5 +0.38/-0.64
190.5＜OD≤228.6 +0.38/-1.14
ASTM A530 & ASTM A335 NPS Outside Diameter, inch Tolerance, mm
1/8≤OD≤1-1/2 ±0.40
1-1/2＜OD≤4 ±0.79
4＜OD≤8 +1.59/-0.79
8＜OD≤12 +2.38/-0.79
OD>12 ±1%
Wall thickness & Tolerance
ASTM A450 Hot rolled Outside Diameter, mm Tolerance, mm
OD≤101.6 +0.4/-0.8
101.6＜OD≤190.5 +0.4/-1.2
190.5＜OD≤228.6 +0.4/-1.6
Cold Drawn Outside Diameter, mm Tolerance, mm
OD＜25.4 ±0.10
25.4≤OD≤38.1 ±0.15
38.1＜OD＜50.8 ±0.20
50.8≤OD＜63.5 ±0.25
63.5≤OD＜76.2 ±0.30
76.2≤OD≤101.6 ±0.38
101.6＜OD≤190.5 +0.38/-0.64
190.5＜OD≤228.6 +0.38/-1.14
ASTM A530 & ASTM A335 NPS Outside Diameter, inch Tolerance, mm
1/8≤OD≤1-1/2 ±0.40
1-1/2＜OD≤4 ±0.79
4＜OD≤8 +1.59/-0.79
8＜OD≤12 +2.38/-0.79
OD>12 ±1%

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