Lean duplex 2101, UNS S32101

Duplex 2101 Stainless Steel Coil, Sheet and Plate

A lean duplex stainless steel with higher strength than 304 and much less nickel, for tanks, structural parts and cost-sensitive industrial fabrication. We support projects that need a more economical alternative to 300 series grades in suitable service environments.

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Forms

Coil, sheet, plate

Thickness

0.15–3.0 mm coil

Width

1000 / 1219 / 1240 / 1500 mm

Also known as

UNS S32101, EN 1.4162

Sizes Overview Properties Processing Compare Documents FAQ Get a quote

Is Sanmei Metal the right supplier for you?

We supply stainless steel together with the processing and technical support that projects and products need.

A good fit if you

Need a specific grade, finish or size for a project, from samples or one coil to a few containers

Want it slit, cut to size or fabricated to your drawing

Need documents: a Mill Test Report with every order, SGS testing on request

Want help choosing the right grade and finish for your application

Build products or projects: equipment housings, architectural interiors, elevator and kitchen work

When buying direct from a mill may suit you better

You need standard grades in full-mill quantities and compare on price per tonne

Not sure which applies to you? Tell us about your order and we will give you our professional advice.

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Sizes we supply in 2101.

Standard widths from stock, cut-to-length sheet, and custom slitting for strip-fed production lines.

2101 coil

Width

1000, 1219, 1240, 1500 mm, or slit to your width

Thickness

0.15–3.0 mm

Coil weight

3–10 t

2101 sheet

Width

1000, 1219, 1240, 1500 mm, or cut to size

Length

2000, 2438, 2500, 3000, 3048 mm

Thickness

0.3–3.0 mm

Every order ships with a Mill Test Report. Sample sheets and small batches are welcome. Standard mill finish: 2B finish.

Get a quote for 2101 Send a cut list or drawing

Why choose duplex 2101?

Strength and corrosion resistance with leaner alloy cost.

More predictable alloy cost

Low nickel content reduces exposure to nickel price swings compared with 300 series grades.

High strength

Much higher yield strength than 304 and 316, for more efficient structural design in suitable applications.

Corrosion resistance in suitable environments

Good resistance to localized corrosion and chloride stress corrosion cracking in moderate service: water treatment, tanks and industrial equipment.

Equivalents

UNS

S32101

EN

1.4162, X2CrMnNiN21-5-1

Trade name

LDX 2101 (an Outokumpu trademark)

Type

Lean duplex

Tell us what the part is, where it will be used and roughly how many. We confirm the grade and finish before you order.

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2101 mechanical properties and composition.

Minimum mechanical values (ASTM A240, S32101, over 5 mm thick).

Property

Metric

Yield strength, min.

65 ksi

450 MPa

Tensile strength, min.

94 ksi

650 MPa

Elongation, min.

30%

Hardness, max.

290 HBW

Chemical composition, % by weight, max. unless a range (ASTM A240)

Grade

2101

0.040

4.0–6.0

1.00

0.040

0.030

21.0–22.0

1.35–1.70

0.10–0.80

0.20–0.25

0.10–0.80

Tell us what the part is, where it will be used and roughly how many. We confirm the grade and finish before you order.

Tell us your application

Corrosion, heat and the shop floor.

How 2101 behaves in service and in fabrication.

Corrosion resistance

Good resistance to localized and uniform corrosion in moderately corrosive environments, and better resistance to chloride stress corrosion cracking than many 300 series grades. Not a universal replacement for higher-alloy duplex in severe chloride service.

Heat resistance

Chosen for strength and corrosion resistance, not as a high-temperature grade. Check elevated-temperature use against the actual service condition and fabrication standard.

Machining

Stronger than 304, so it needs controlled conditions: proper cutting speeds, rigid tooling and suitable tool materials.

Welding

Follow duplex practice: control heat input to keep the duplex structure, use a filler such as ER2209 as the procedure qualifies, and clean after welding. GTAW, GMAW and SMAW all work with a qualified procedure.

Hot working

Possible, with careful temperature control to keep the right phase balance. Follow duplex processing guidance, not austenitic assumptions.

Annealing

Follow qualified technical guidance or mill recommendations; correct heat treatment and cooling protect corrosion resistance and properties.

Have a drawing, cut list or sample photo? Upload it and we review it and send you a quote.

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Duplex 2101 or another grade?

Choose by corrosion conditions, fabrication, strength needs and budget.

2101 vs 304

304 is austenitic, easy to fabricate, with broad general corrosion resistance. 2101 is lean duplex, stronger and lower in nickel, and is replacing 304 in some projects that need strength and cost efficiency.

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304

2101 vs 2205

2205 is the higher-alloy duplex for more severe chloride conditions. 2101 is the economical choice for moderate chloride, cost-sensitive projects.

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2205

2101 vs 316L

316L, with molybdenum, has stronger general pitting resistance for demanding corrosion. 2101 suits moderate environments where structural efficiency matters more.

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316l

Not sure which grade fits?

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