Related Specifications
Surface Treatments
Certifications
- ISO 9001 - 2015 Certified
- PED 2014/68/EC
- NACE MR0175/ISO 15156-2
- NORSOK M-650
- DFAR
- MERKBLATT AD 2000 W2/W7/W10
ASTM A1082/A1082M Grade S32101 | Lean Duplex 2101 Stainless Steel
Cost-effective lean duplex steel providing high strength and good corrosion resistance
Grade S32101 (UNS S32101) is a low-nickel lean duplex stainless steel, designated as Lean Duplex 2101, containing 21% chromium, 1.5% nickel, and nitrogen strengthening to deliver roughly double the yield strength of 304L and 316L austenitic grades with comparable corrosion resistance in many environments. This lean duplex grade is engineered as a cost-stable alternative to nickel-sensitive austenitic alloys, offering superior resistance to chloride stress corrosion cracking and improved mechanical properties. S32101 is widely utilized in storage tanks, pressure vessels, civil engineering structures, desalination plants, and water treatment equipment where a combination of high structural strength and durability is required. The material maintains excellent weldability and toughness, making it ideal for large-scale fabrications and structural components.
ASTM A1082/A1082M Grade S32101 Chemical RequirementsA
| Grades | UNS Designation | Type | C | Mn | P | S | Si | Cr | Ni | Mo | N | Other ElementsB |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ASTM A1082/A1082M Duplex (Ferritic-Austenitic) Grades | S32101 | . . . | 0.040 | 4.0-6.0 | 0.040 | 0.030 | 1.00 | 21.0-22.0 | 1.35-1.70 | 0.10-0.80 | 0.20-0.25 | Cu 0.10-0.80 |
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ASTM A1082/A1082M Grade S32101 Mechanical Properties
| UNS Designation | Solution Temperature, °F [°C] (B, C) | Tensile Strength, min, ksi [MPa] | Yield Strength, 0.2% offset, min, ksi [MPa] | Elongation in 2" [50 mm] or 4D, min, % | Rockwell HRC, max | Brinell max (D) |
|---|---|---|---|---|---|---|
| S32101 | 1870 [1020] | 94 [650] | 65 [450] | 30 | 30 | 290 |
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ASTM A1082/A1082M Markings
| UNS Designation | Grade Symbol |
|---|---|
| S32101 | TB 32101 |
Frequently Asked Questions
What is Lean Duplex LDX 2101 (S32101)?
Lean Duplex LDX 2101 (S32101) is a stainless steel grade covered under ASTM A1082/A1082M for high-strength bolting in special-purpose applications such as pressure vessels. UNS designation S32101. Available as bolts, studs, screws and nuts manufactured by TorqBolt for global oil/gas/nuclear/power/marine sectors.
What are the mechanical properties of Lean Duplex LDX 2101 (S32101) per ASTM A1082?
Mechanical property requirements for S32101 are defined in ASTM A1082 Table 2 (PH grade solution treatment) or Table 4 (duplex annealed condition). Properties vary by treatment condition - refer to the bolting specification for the H-condition (PH) or annealed yield/tensile/elongation/hardness requirements applicable to your order.
Is Lean Duplex LDX 2101 (S32101) suitable for sour service (NACE MR0175)?
Refer to NACE MR0175 / ISO 15156 Tables A.16-A.19. Most A1082 duplex grades are permitted at ≤28 HRC; PH grades require condition-specific qualification (typically H1150 for 17-4 PH at 28 HRC). TorqBolt supplies sour-service certified product on request with full PMI + hardness traceability.
What ASME / ISO dimensional standards can Lean Duplex LDX 2101 (S32101) be supplied to?
This grade is available across the full ASME and ISO bolting dimensional standards covered on this site - ASME B18.2.1 (hex bolts, hex cap screws, lag screws), B18.2.2 (hex nuts, square nuts, lock nuts), B18.3 (socket head cap screws), B18.31.2 (clamping studs), B16.5 (flange stud bolts), ISO 4032 / 4033 / 4035 (metric nuts), and metric B18.2.3.xM / B18.2.4.xM series.
References & Standards
- ASTM A1082 / A1082M - Standard Specification for High-Strength Precipitation-Hardening and Duplex Stainless Steel Bolting for Special-Purpose Applications (current edition 2016, active)
- ASTM A962 / A962M - General Requirements for Special-Purpose Bolting Materials
- ASTM A370 - Mechanical Testing of Steel Products
- NACE MR0175 / ISO 15156 - Sour-service hardness limits for petroleum & natural gas industries
- ASME B18 series - Dimensional standards for bolts, screws, nuts, studs
- ISO 4032 / 4033 / 4035 - Metric hexagon nut dimensional standards
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