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JM Hardware® Hyper Duplex Stainless Steel(PREN range: 48-50) - UNS No. S32707,S33207 Fastener

Home > Products > Special Alloy Parts > JM Hardware® Hyper Duplex Stainless Steel(PREN range: 48-50) - UNS No. S32707,S33207 Fastener

At JM Hardware®, we are a leading Hyper Duplex Stainless Steel fastener manufacturer, offering premium-quality fasteners that meet the demanding needs of industries such as oil & gas, chemical processing, desalination, and marine engineering. Hyper Duplex Stainless Steel fasteners are specifically designed to provide superior mechanical properties, exceptional corrosion resistance, and unmatched performance in the most extreme environments. With our expertise and advanced manufacturing capabilities, we deliver fastener solutions that exceed expectations for durability and reliability.

Email: jminfo@jm-industry.com

Tel: +86 18621005605

Whatsapp: +86 13681923533

JM Hardware® Hyper Duplex Stainless Steel(PREN range: 48-50) - UNS No. S32707,S33207 Fastener

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Description

Typically grade EN 1.4410 up to so-called hyper duplex grades (PREN: >45) developed later to meet specific demands of the oil and gas as well as those of the chemical industries. They offer a superior corrosion resistance and strength but are more difficult to process because the higher contents of Cr, Mo, N and even W promote the formation of intermetallic phases, which reduce drastically the impact resistance of the steel. Faulty processing will result in poor performance and users are advised to deal with reputable suppliers/processors.Applications include deepwater offshore oil production.

AS ISO 17781:2022 / ISO 17781:2022

Type 27Cr Duplex

48,0 ≤ PREN ≤ 55,0 and Cr ≤ 33,0 %

UNS No.	EN No.	C	Cr	Ni	Mo	N	Mn	Cu	W
S33207ᵈ	1.4485	0,03	29,0 to 33,0	6,0 to 9,0	3,0 to 5,0	0,40 to 0,60	1,5	1,0	c
S32707ᵈ	1.4658	0,03	26,0 to 29,0	5,5 to 9,5	4,0 to 5,0	0,30 to 0,50	1,50	1,0	c

Duplex & Super Duplex Material Selection Chart

Lean Duplex → 2205 → 2507 → 27Cr Duplex

Material Level	Typical Grade	EN No.	ISO 17781 Group	PREN Range	Typical Chemistry Focus	ISO 17781 Corrosion Test	Typical Environment	Fastener Application
Lean Duplex	S32101 / S32304	1.4162 / 1.4362	Type 20Cr	24–30	Lower Ni / Mo, cost-efficient	ASTM A1084, 18–30°C × 24h	Mild–moderate chloride, structural & general industrial service	Bolts, nuts, threaded rods for less severe corrosive environments
Duplex 2205	S31803 / S32205	1.4462	Type 22Cr	30–40	Cr ≈ 22%, Mo ≈ 3%, N ≈ 0.15%	ASTM G48 Method A, 25°C × 24h	Oil & gas, chemical plants, process equipment, marine service	Stud bolts, bolts, nuts, anchor bolts, equipment fasteners
Super Duplex 2507	S32750	1.4410	Type 25Cr	40–48	Cr 24–26%, Ni 6–8%, Mo 3–5%, N 0.24–0.32%	ASTM G48 Method A, 50°C × 24h	High chloride, seawater, offshore, subsea	Offshore bolting, subsea fasteners, seawater system bolts, flange bolting
Super Duplex	S32760	1.4501	Type 25Cr	40–48	Cr 24–26%, Mo 3–4%, N 0.20–0.30%, Cu + W	ASTM G48 Method A, 50°C × 24h	Aggressive seawater, offshore, chemical & sour-service related applications	Stud bolts, heavy hex bolts/nuts, valve & pump fasteners, offshore equipment
27Cr High-Alloy Duplex	S33207 / S32707	1.4485 / 1.4658	Type 27Cr	48–55	Higher Cr, Mo and N; very high pitting resistance	ASTM G48 Method A, 60°C × 24h	Extremely aggressive chloride / seawater / high-corrosion process environments	Critical offshore, subsea, chemical and special-project fasteners

Forms of Hyper 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
STUD	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
WASHER	SPRING WASHER	ANSI/ASME B18.21.1, DIN127	3/8”-4”, M6-M100

Testing before shipping

Step 1: Size Detection

Step 2: GO Gauge and NO-GO Gauge Detection

Step 3: Chemical Composition Detection

Step 4: Mechanical Properties Test

Step 5: The product is carefully packaged

Application

Duplex stainless steels are usually selected for their high mechanical properties and good to very high corrosion resistance (particularly to stress corrosion cracking).

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.

Technical Data

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