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At JM Hardware®, we are a trusted Lean Duplex Stainless Steel (SS) fastener manufacturer, specializing in producing high-quality fasteners that deliver exceptional strength, corrosion resistance, and cost-efficiency. Lean Duplex Stainless Steel fasteners are widely recognized for their superior performance in environments where conventional stainless steel or carbon steel may fail. Our tailored manufacturing solutions and diverse product range make us the preferred partner for B2B buyers across industries such as construction, marine, chemical processing, and oil & gas.
Typically grade EN 1.4362, have been developed more recently for less demanding applications, particularly in the building and construction industry. Their corrosion resistance is closer to that of the standard austenitic grade EN 1.4401 (with a plus on resistance to stress corrosion cracking) and their mechanical properties are higher. This can be a great advantage when strength is important. This is the case in bridges, pressure vessels or tie bars.
The use of manganese ensures proper ferrite-austenite phase balance, while allowing a reduction in nickel content. As a result, Lean duplex stainless is priced competitively with 304L and 316L stainless steels. Due to its relatively low alloying content, it is less prone to precipitation of intermetallic phases than other duplex steels.
| Lean Duplex | ||||||||||||
| ID | Name | ASTM | EN-Nr. | C max. | Cr | Ni | Mo | N | Mn max. | Cu | W | PRE* |
| 2101 | S32101 | 1.4162 | 0,04 | 21,0-22,0 | 1,35-1,7 | 0,1 – 0,8 | 0,20-0,25 | 4,0-6,0 | 0,1-0,8 | – | 26 | |
| F66 | 2202 | S32202 | 1.4062 | 0,03 | 21,5-24,0 | 1,0-2,8 | 0,45 | 0,18-0,26 | 2,0 | – | 26 | |
| F68 | 2304 | S32304 | 1.4362 | 0,03 | 21,5-24,5 | 3,0-5,5 | 0,05-0,6 | 0,05-0,20 | 2,5 | 0,05-0,60 | – | 26 |
| 2102 | S82011 | 0,03 | 20.5-23.5 | 1.00-2.00 | 0,1 – 1.00 | 0.15-0.27 | 2.00-3.00 | 0.5 | – | 26 | ||
| Standard Duplex | ||||||||||||
| ID | Name | ASTM | EN-Nr. | C max. | Cr | Ni | Mo | N | Mn max. | Cu | W | PRE* |
| F51 | 2205 | S31803 | 1.4462 | 0,03 | 21,0-23,0 | 4,5-6,5 | 2,5-3,5 | 0,08-0,20 | 2,0 | – | – | 33 |
| F60 | 2205 | S32205 | 1.4462 | 0,03 | 22,0-23,0 | 4,5-6,5 | 3,0-3,5 | 0,14-0,20 | 2,0 | – | – | 35 |
| 2003 | S32003 | 1.4662 | 0,03 | 19.5-22.5 | 3.0-4.0 | 1.5-2.0 | 0.14-0.2 | 2,0 | – | – | 30 | |
| 2404 | S82441 | 1.4662 | 0,03 | 23.0-25.0 | 3.0-4.5 | 1.00-2.00 | 0.20-0.30 | 2.5-4.0 | 0.10-0.80 | – | 33 | |
| Super Duplex | ||||||||||||
| ID | Name | ASTM | EN-Nr. | C max. | Cr | Ni | Mo | N | Mn max. | Cu | W | PRE* |
| F59 | S32520 | 1.4507 | 0,03 | 24,0-26,0 | 5,5-8,0 | 3,0-4,0 | 0,20-0,35 | 1,5 | 0,5-2,0 | – | >40 | |
| F61 | 255 | S32550 | 1.4507 | 0,04 | 24,0-27,0 | 4,5-6,5 | 2,9-3,9 | 0,10-0,25 | 1,5 | 1,5-2,5 | – | >40 |
| F53 | 2507 | S32750 | 1.441 | 0,03 | 24,0-26,0 | 6,0-8,0 | 3,0-5,0 | 0,24-0,32 | 1,2 | 0,50 | – | 43 |
| F55 | Z100 | S32760 | 1.4501 | 0,03 | 24,0-26,0 | 6,0-8,0 | 3,0-4,0 | 0,20-0,30 | 1,0 | 0,5-1,0 | 0,5-1,0 | 42 |
| Hyper Duplex | ||||||||||||
| Name | ASTM | EN-Nr. | C max. | Cr | Ni | Mo | N | Mn max. | Cu | W | PRE* | |
| 2707 | S32707 | – | 0,03 | 26,0-29,0 | 5,5-9,5 | 4,0-5,0 | 0,30-0,50 | 1,5 | 1,00 | – | 49 | |
| 3207 | S33207 | – | 0,03 | 29,0-33,0 | 6,0-9,0 | 3,0-5,0 | 0,40-0,60 | 1,5 | 1,00 | – | 50 | |
| Austenitic Grades | ||||||||||||
| ASTM | EN-Nr. | C max. | Cr | Ni | Mo | N | Mn | Cu | W | PRE* | ||
| 304L | 1.4307 | 0,03 | 17,5-19,5 | 8,0-10,5 | – | 0,11 | – | – | – | 18 | ||
| 316L | 1.4404 | 0,03 | 16,5-18,5 | 10,0-13,0 | 2,0-2,5 | 0,10 | – | – | – | 24 | ||
| 904L | 1.4539 | 0,02 | 19,0-21,0 | 24,0-26,0 | 4,0-5,0 | 0,15 | – | 1,20 | – | 34 | ||
| S31254 | 1.4547 | 0,2 | 19,5-20,5 | 17,5-18,5 | 6,0-7,0 | 0,18-0,25 | – | 0,5-1,0 | – | 43 | ||
Forms of Lean Duplex SS Fastener Available at JM Hardware®
| Product name | Standard No. | Size | |
| BOLT | HEX HEAD BOLT | ANSI/ASME B18.2.1, DIN933, DIN931 | 1/4”-4”, M5-M100 |
| SOCKET CAP SCREW | ANSI/ASME B18.3, DIN912, DIN7991, DIN913/916 | 1/4”-4”, M5-M100 | |
| FLANGE BOLT | ANSI/ASME B18.2.3.4M-2001, DIN 6921 | 1/2”-4”, M10-M100 | |
| EYE BOLT | ANSI/ASME, DIN standard | 1/2”-4”, M10-M100 | |
| OTHER BOLT | U BOLT, T BOLT, J BOLT, SQURE HEAD BOLT, SHOULDER BOLT, AND NON-STANDARD BOLT ACCORDING TO CUSTOMER NEEDS. | ||
| STUD | THREADED ROD/BAR | ANSI/ASME, DIN975/DIN976 | 3/8”-4”, M5-M100 |
| DOUBLE ENDS STUDS | ANSI/ASME, DIN STANDARD | 3/8”-4”, M5-M100 | |
| NUT | HEX NUT | ANSI/ASME B18.2.2, DIN934 | 1/4”-4”, M5-M100 |
| HEAVY HEX NUT | ANSI/ASME B18.2.2, DIN standard | 1/2”-4”, M12-M100 | |
| NYLON LOCK NUT | ANSI/ASME B18.16.6-2008, DIN 985,DIN982 | 1/2”-4”, M12-M100 | |
| FLANGE NUT | ANSI/ASME, DIN6923 | 1/2”-4”, M12-M100 | |
| COUPLING NUT/LONG NUT | ANSI/ASME, DIN STANDARD | 1/2”-4”, M12-M100 | |
| SQUARE NUT | ANSI/ASME, DIN 557 | 1/2”-4”, M12-M100 | |
| HEX DOOMD CAP NUT | ANSI/ASME, DIN1587 | 1/2”-4”, M12-M100 | |
| WING NUT | ANSI/ASME, DIN315 | 1/2”-4”, M12-M100 | |
| WASHER | FLAT WASHER | ANSI/ASME B18.22.1, DIN125 | 3/8”-4”, M6-M100 |
| SPRING WASHER | ANSI/ASME B18.21.1, DIN127 | 3/8”-4”, M6-M100 |
Oil and Gas:
a wide range of equipment: flowlines, manifolds, risers, pumps, valves, etc.
Pulp and Paper:
digesters, pressure vessels, liquor tanks, etc.
Chemical engineering:
pressure vessels, heat exchangers, condensers, distillation columns, agitators, marine chemical tankers, etc.
Water:
desalination plants, large tanks for water storage, waste water treatment
renewable energy: Biogas tanks
Mobility: tramcars and bus frames, tank trucks, iron ore wagons
Engineering: pumps, valves, fittings, springs, etc.
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