A106 Seamless Steel Pipe

ASTM A106 (equivalent to ASME SA-106) is the core standard for seamless carbon steel tubing for high-temperature applications in the United States. Its key characteristics include: **Seamless-only:** This standard covers only seamless steel tubing and does not include welded tubing.

*Delivery condition:** Typically delivered in hot-rolled condition; if cold-drawn, heat treatment (such as normalizing or stress-relief annealing) is required.

*Rigorous testing:** The standard mandates hydrostatic testing, and supplementary tests such as Charpy V-impact testing (low-temperature toughness) and metallographic examination can be added upon customer request.

PRODUCT DESCRIPTION

Product name	ASTM A106 Seamless Pipe
Product standard	ASTM A106/ A53 / API 5L
Product material	Grade B / X 42 / X 52 / X 60
Outer diameter	1/2 " --- 60 "
Wall thickness	SCH 10 --- SCH 160
Processing	Grooved / Bevelled / Plain end
Surface treatment	Black painting / Galvanized/Red painting/epoxy
Price term	FOB / CIF / EXW
Payment term	30% TT advance and Balance 70% against copy of BL / LC at sight

ASTM A106 Seamless Pipe	Grade A	Grade B	Grade C
Chemical Composition (max, %)	Carbon (C): ≤ 0.25 Manganese (Mn): 0.27–0.93 Silicon (Si): ≥ 0.10 Phosphorus (P): ≤ 0.035 Sulfur (S): ≤ 0.035	Carbon (C): ≤ 0.30 Manganese (Mn): 0.29–1.06 Silicon (Si): ≥ 0.10 Phosphorus (P): ≤ 0.035 Sulfur (S): ≤ 0.035	Carbon (C): ≤ 0.35 Manganese (Mn): 0.29–1.06 Silicon (Si): ≥ 0.10 Phosphorus (P): ≤ 0.035 Sulfur (S): ≤ 0.035
Mechanical Properties (min)	Tensile Strength: ≥ 330 MPa Yield Strength: ≥ 205 MPa Elongation: approx. 20% – 35%*	Tensile Strength: ≥ 415 MPa Yield Strength: ≥ 240 MPa Elongation: approx. 20% – 30%*	Tensile Strength: ≥ 485 MPa Yield Strength: ≥ 275 MPa Elongation: approx. 20% – 30%*
Application Scenarios	Low stress, high weldability requirements	Most commonly used grade, suitable for general high-temperature process piping	High pressure, thick-wall applications; preheating required for welding
Maximum Service Temperature	Approx. 427°C (800°F)	Approx. 427°C (800°F)	Approx. 427°C (800°F)

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