You are here: Home » Alloys » Duplex&super duplex » Super Duplex S32750/F53

Product List

Share to:

Super Duplex S32750/F53

Material: Grade S32750, DIN 1.4410, F53

The super duplex stainless steel standard grade is UNS S32750, which contains high molybdenum and nitrogen, and some also contain tungsten and copper. The PREN value is greater than 40. It can be used in harsh media conditions and has good comprehensive corrosion resistance and mechanical properties, comparable to super austenitic stainless steel.

Availability:



Inquire Add to Basket

What Is S32750

UNS S32750 super duplex steel consists of 25% chromium, 4% molybdenum and 7% nickel. It has high strength and corrosion resistance and is mainly used in chemical processing, petrochemical and subsea equipment. It has strong resistance to chloride corrosion, high thermal conductivity and low thermal expansion coefficient. The high chromium, molybdenum and nitrogen content makes it highly resistant to pitting, crevice and uniform corrosion. The grade standard of S32750 is as follows:

Standard

UNS S32750

DIN/EN 1.4410

ASTM A240/SA240M

Super Duplex S32750 F53 DIN 1.4410

S32750 Composition

Grade	C≤	Mn≤	P≤	S≤	Si≤	Ni	Cr	Mo	N	Cu≤
S32750	0.03	1.20	0.035	0.02	0.80	6.0-8.0	24.0-26.0	3.0-5.0	0.24-0.32	0.5

S32750 Mechanical Properties

Grade

Tensile, min,

ksi[MPa]

Yield, min, ksi[MPa]

Elongation,

%(min)

Hardness,

HB（max）

S32750

116 [795]

80 [550]

15

310

S32750 Advantages

Corrosion resistance: The high chromium and molybdenum content in S32750 makes it have strong overall corrosion resistance to organic acids such as formic acid and acetic acid. Compared with 904L, SAF2507 has stronger corrosion resistance.
Heat treatment ability: S32750 should be solution annealed and quenched after hot or cold forming. The temperature of solution annealing should not be lower than 1052°C, and air or water cooling quenching should be performed immediately afterwards.
Welding performance: S32750 has good weldability and can be welded by the following methods: SMAW, GTAW, PAW, FCW, SAW.

Duplex S32750 Physical Properties

Density (Kg/m³)	7810
Magnetic Permeability (20°C)	33
Young’s Modulus (kN/mm²)	199
Specific Electrical Resistance, 20°C (µΩ.m)	0.8
Mean coefficient of thermal expansion, 20-300°C (m/m/^oC)	11.1 x 10^-6
Specific Heat, 20°C (J/kg.K)	475
Thermal conductivity, 20°C (W/m.K)	14.2

S32750 Equivalent Grades

STANDARD	WERKSTOFF NR.	UNS	EN
Super Duplex S32750	1.4410	S32750	X2CrNiMoN25-7-4

Super Duplex S32750 Specifications

Product	Standard	Show
Pipe SMLS & Welded	ASTM A790/A928
Tube SMLS & Welded	ASTM A789
Sheet / Plate	ASTM A240
Bar / Rod	ASTM A276/A479
Forging / Flange	ASTM A182
BW Fittings	ASTM A815

S32750 Application

Oil and gas industry equipment
Offshore platforms, heat exchangers, underwater equipment, fire-fighting equipment
Chemical processing industry, pipeline
Desalination plants, high pressure reverse osmosis plants and subsea pipelines
Mechanical parts (high-strength, corrosion-resistant parts)
Energy industry FGD system, industrial washing system, absorption tower