S32101 1.4162 2101LDX Duplex Stainless Steel Pipe and Tube

Stainless steel grade Duplex S32101 1.4162 2101 LDX is a low-alloyed, general-purpose duplex. This steel possesses high tensile strength as well as high fatigue strength. Its high mechanical strength is same as other duplex grades, and its good corrosion resistance is equal to most standard stainless steel grades. All these properties are utilized to design products with strength, low maintenance, durability and long-term cost efficiency.

Stainless Seamless Fluid Pipe Quality Control

1. Raw materials pipe blank quality classification: high quality, medium, economical
2. Raw materials inspection after receive in factory
3. After pickled, tube will be grinded careful to less defect
4. Multiple cold drawn/rolled process for precision dimension
5. Standard heat-treated of continuous annealed/solution for better property, intergranular corrosion
6. Full Inspection: ET, UT, Hydraulic Test, Penetration Test, Grinded, Sand Blast, Print Making

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We also can supply other kinds of:

• Seamless Stainless Steel Pipe & Tube
• Welded Stainless Steel Pipe & Tube
• U Type Stainless Steel Pipe & Tube
• Coil Type Stainless Steel Pipe & Tube(Max 300meter), seamless or welded
• Annealed Pickled AP Stainless Steel Pipe & Tube (Ra ≤5μm)
• Bright Annealed BA Stainless Steel Pipe & Tube (Ra ≤8μm)
• Mechanical Polished MP Stainless Steel Pipe & Tube (Ra ≤8μm)
• Electro Polished EP Stainless Steel Pipe & Tube (Ra ≤25μm)
• Sanitary Stainless Steel Pipe & Tube
• Capilllary Stainless Steel Pipe & Tube
• Instrument Stainless Steel Pipe & Tube

Typical applications

• Storage tanks
• Household heaters
• Structural components for floodgates and bridges or rebar for concrete structures
• Pulp and paper industry applications
• Flanges and valves

Features

• High resistance to chloride stress corrosion cracking (SCC)
• High strength
• Good fatigue strength
• Chloride pitting resistance comparable to type 316L stainless
• Good general corrosion resistance
• Good machinability and weldability
• Useful up to 600°F

Equvialent

UNS	DIN	EN
S32101	1.4162	X2CrMnNiN21-5-1

Chemical composition %  

C	Si	Mn	Ni	P	S	Cr	Mo	N	Cu
max   0.04	max   1	4 – 6	1.35 – 1.7	max   0.04	max   0.015	21 – 22	0.1 – 0.8	0.2 – 0.25	0.1 – 0.8

Mechanical Properties

		Minimum values	Typical values
0.2% Offset Yield Strength	ksi	65	69
Tensile Strength	ksi	94	101
Elongation	%	30	38
Hardness (Brinell)	HB	290 (max)	225

Stainless Steel Tube & Pipe Sizes:

Outsider Diameter OD : 6-630mm ; WT 3-60mm ; L max 16meter

Stainless Steel Tube Delivery Condition:

• Solution Treatment

Stainless Tube Surface:

Acid pickling – pre-passivation process of treating stainless steel parts with an acid solution, typically hydrochloric or sulfuric acid, which can remove oxide scale and heat tint while dissolving steel flecks embedded in the part.

Polishing – P grade sandpaper: P150, P200, P250, P300, P400, P500, P600, P700, P800

Stainless Pipe Inspection and Testing:

Chamical analysis / Tensile test at room temperature / flattening test / ring tensile test / drift expemdomg test / ring expanding test / leak tightness test / Tensile test at elevated temperature / impact test at room temperature / impact test at low temperature / eddy current test / ultrasonic test / magnetic flux leakage test

Stainless Tube Marking and Packages:

In addition to the marking prescribed in specification as client’s request.

Bare / Nylon / Plastic / Wooden Case

Heat Treatment
Solution annealing at 1020 – 1100°C followed by water quenching.

Corrosion Properties

The corrosion resistance of LDX 2101 is generally better than 304L and comparable to 316L making it suitable for use in a wide variety of industries and applications.

Chloride Pitting Resistance

The pitting resistance of an austenitic stainless steel can be related directly to alloy composition, where chromium, molybdenum and nitrogen are a weight %. The Pitting Resistance Equivalent Number (PREN) uses the following formula to measure an alloy’s relative pitting resistance – the higher the number, the better the pitting resistance.

PREN = %Cr + 3.3Mo + 30N

Stress-Corrosion Cracking Resistance

Chloride stress-corrosion cracking (SCC) is one of the most serious forms of localized corrosion. Higher temperatures and reduced pH will increase the probability of SCC. The onset of SCC is one of the most common reasons for stainless equipment failure. Because of its duplex structure LDX 2101 offers excellent resistance to SCC.

General Corrosion

General corrosion is characterized as a uniform attack on a surface in contact with a corrosive medium. The resistance to uniform corrosion in sulfuric acid is shown below. LDX 2101 is superior to 304L and in some cases comparable to 316L.