ASME SA209 Alloy Steel Pipe

ASTM A209 specifies the requirements for various grades of minimum wall thickness seamless carbon-molybdenum alloy steel tubes. These grades include T1, T1a, and T1b, which are different in terms of their chemical composition and mechanical properties.

standard:ASTM

Surface :1. Galvanized 2. Black and Color Painting

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introduction

What is ASTM A209 Steel Pipe?

ASTM A209 tubing is a carbon molybdenum alloy steel Seamless Tubing used in boilers, boiler flues, super heaters, ASME SA209 is available in A209 Grade T1, A209 Grade T1A, and A209 Grade T1B.

ASME SA209 Grade T1a Alloy Steel Seamless Tubes are Carbon Steel Tubes with subsequent addition of chromium, molybdenum and sometimes vanadium are known as chrome moly Tubes.

The three stainless steel alloys ASTM/ASME A/SA209 T1, T1a and T1b have slightly different compositions and mechanical properties and are commonly used in different applications.
ASTM/ASME A/SA209 T1 alloy contains at least 1.00% chromium and 0.18% molybdenum. It has good high-temperature strength and pressure resistance and is often used in applications that require high temperature and pressure resistance, such as thermal equipment, boilers and nuclear power plants.
In comparison, ASTM/ASME A/SA209 T1a is a variation of ASTM/ASME A/SA209 T1 with a slightly different composition, containing at least 1.25% chromium and 0.44% molybdenum. This compositional variation may result in different mechanical properties, providing specific advantages in certain applications.
Likewise, ASTM/ASME A/SA209 T1b is a variation of ASTM/ASME A/SA209 T1 and contains at least 0.50% chromium and 0.25% molybdenum. However, ASTM/ASME A/SA209 T1b is designed to have specific properties that may be beneficial in certain high temperature environments.

Technical Data

Chemical Composition Of SA 209 Steel Pipe, A209 Grade T1, T1a & T1b

Grade	Mo	Cr	Mn	P	S	C	Si
T1	0.44-0.65	/	0.30-0.80	≤0.025	≤0.025	0.10-0.20	0.10-0.50
T1a	0.44-0.65	/	0.30-0.80	≤0.025	≤0.025	0.15-0.25	0.10-0.50
T1b	0.44-0.65	/	0.30-0.80	≤0.025	≤0.025	0.14max	0.10-0.50

Mechanical Properties Of ASTM A209 Steel Pipe

Grade	T1	T1a	T1b
Tensile Strength min Ksi(Mpa)	55(380)	60(415)	43(365)
Yield Strength Min Ksi(Mpa)	30(205	32(220)	28(195)
Elongation in 2in or 50mm min%	30	30	30

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