Name: ASTM B729 Alloy20 (UNS N08020) Seamless Tube, Corrosion-Resistant for Acidic Environments
Brand: Yuhong Group Co.,Ltd
SKU: ASTM B729 N08020
Price: 150000 USD
Availability: InStock

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ASTM B729 Alloy20 (UNS N08020) Seamless Tube, Corrosion-Resistant for Acidic Environments

Product Details:

Place of Origin:	CHINA
Brand Name:	YUHONG
Certification:	ABS, GL, DNV, NK, PED, AD2000, GOST9941-81, CCS, ISO 9001-2008
Model Number:	ASTM B729 N08020

Payment & Shipping Terms:

Minimum Order Quantity:	1000 KGS
Price:	Negotiable
Packaging Details:	wooden Cases
Delivery Time:	Depends On Quantity
Payment Terms:	T/T,L/C
Supply Ability:	50 Tons/Month

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Detailed Product Description

Standard:	ASTM B729 / ASME SB729, ASTM B829	Grade:	Alloy20 (UNS N08020, EN 2.4660), Nickel-Iron-Chromium Alloy
Type:	Seamless Tube (SMLS), Hot-Finished / Cold-Worked	Process:	Hot Extrusion/Piercing, Cold Drawing/Rolling, Stabilized Annealing
Outside Diameter:	6mm – 325mm (1/4” – 12”)	Wall Thickness:	0.5mm – 30mm, SCH 5S – SCH XXS
Length:	6000mm – 12000mm, Custom Length Optional	Dimensional Tolerance:	Complies With ASTM B729, ±0.03mm (WT), ±0.5mm (OD)
Highlight:	Alloy20 seamless corrosion-resistant tube , ASTM B729 acid-resistant tube , UNS N08020 stainless steel tube

ASTM B729 Alloy20 (UNS N08020) Seamless Tube, Corrosion-Resistant for Acidic Environments

Brief Introduction

ASTM B729 Alloy20 seamless tube (SMLS TUBE) is a high-performance nickel-iron-chromium-molybdenum-copper alloy tube, strictly compliant with ASTM B729 / ASME SB729 standard, mainly made of Alloy20 (UNS N08020, EN 2.4660). It is a super austenitic alloy specially designed for corrosive service, featuring excellent resistance to sulfuric acid, phosphoric acid and chloride ion stress corrosion cracking, superior to ordinary stainless steel. With good mechanical properties, weldability and processing performance, it is a key component for conveying corrosive media in harsh industrial environments, widely used in chemical, petrochemical, pharmaceutical and other fields to ensure stable and efficient operation of pipeline systems.

Chemical Composition Analysis (wt%)

Alloy Grade	C	Cr	Ni	Mo	Cu	Mn	Si	P	S	Ti
ASTM B729 Alloy20 (UNS N08020)	≤0.07	19.0-21.0	32.0-38.0	2.0-3.0	3.0-4.0	≤2.0	≤1.0	≤0.045	≤0.035	0.6-1.2

Typical Mechanical Properties

Mechanical Property	Standard Requirement (ASTM B729)	Typical Value
Yield Strength (Rp0.2), MPa	≥240	245-320
Tensile Strength (Rm), MPa	≥550	560-700
Elongation (A), %	≥30	32-40
Hardness (HB), Brinell	≤200	140-190
Impact Toughness (KV), J (-20℃)	≥80	85-110

Product Application Scope

Industry Field	Typical Applications
Chemical Processing	Sulfuric/phosphoric acid conveying pipelines, reactors, heat exchangers, acid washing equipment, chemical reagent transfer systems
Petrochemical	Oil refining corrosive media pipelines, offshore oil platforms, flue gas desulfurization (FGD) systems, crude oil processing auxiliary pipelines
Pharmaceutical	High-purity medium conveying pipelines, sterile equipment, chemical reagent conveying tubes, pharmaceutical purification systems
Marine Engineering	Seawater treatment pipelines, marine vessel corrosive-resistant tubes, coastal industrial equipment, offshore drilling platform pipelines
Environmental Protection	Wastewater treatment pipelines, hazardous waste treatment equipment, acid-base waste conveying systems, flue gas purification pipelines
Other	Chemical laboratories, electrolytic water hydrogen production equipment, high-purity water treatment systems, pickling industry pipelines