Description

We are the Leading Supplier of Stainless Steel Super Duplex S32550.
Stainless Steel S32550 (Ferralium 255) is a Super Duplex Stainless Steel supplied in the hot worked and annealed condition.

We supply and export to Singapore , Indonesia , Brunei and other ASEAN Countries.
Our specialty is to provide wide range of stainless steel with no minimum order (MOQ).

E Steel supply Stainless Steel Super Duplex S32550 (Ferralium 255 , F61 Duplex) Round Bars / Rods / Shafts , Super Duplex S32550 (Ferralium 255) Plates

Description

Super Duplex S32550 Suppliers - Ferralium 255 , 1.4507, F61 Duplex Stainless Steel

Ferralium® 255 – Super Duplex 4507 is a Super Duplex Stainless Steel supplied in the hot worked and annealed condition. It achieves higher strengths than most stainless steels and alternative corrosion resistant alloys, offering the potential to reduce section size and therefore weight and cost.

As a 25% Cr alloy, with significant additions of copper, Ferralium® 255 offers excellent corrosion resistance in a wide variety of corrosive chemicals including sulphuric, nitric and phosphoric acid. In seawater and other chloride containing environments it also provides outstanding resistance to pitting and crevice corrosion, with Critical Pitting Temperature exceeding 50°C. Excellent ductility and impact strength at both ambient and sub-zero temperatures combine with a high resistance to abrasion, erosion and cavitation erosion.

Listed in NACE MR 01 75 for sour service and having gained ASME Approval for Pressure Vessel applications, Ferralium® 255-SD50 is tested to the highest degree using tests designed to guarantee that the trade-marked product possesses high integrity, a correct phase balance and the absence of sigma and other deleterious phases.

Chemical Composition of Super Duplex S32550

Cr = 25.5 | Ni = 5.5 | Mo = 3.4 | C = 0.04 | Mn = 1.5 | Si = 1.0 | Fe = Bal | N = 0.175 | S = 0.030 | Cu = 2.00 | P = 0.040

Applications of Ferralium 255 , S32550 Super Duplex

FERRALIUM 255 is a cost effective alternative to materials such as the nickel alloys, 20 type alloys, brass and bronze. Marine environments have long been the domain of admiralty bronze. Alloy 255 is replacing admiralty bronze, and the nickel alloys, in offshore platforms, deck hardware, rudders and shafting.

Alloy 255 is also making inroads in “borderline” corrosion applications where the nickel alloys and high performance alloys have been used but may not have been absolutely necessary. In some instances, it has even been used to replace high performance Ni-Cr-Mo-F-Cu alloys in the phosphoric acid industry.

Valves, pumps, shafts, marine environments, Applications in down-hole, waste water, polycarbonate production, and demineralized water production.

Mechanical Properties of Alloy 255

	Ultimate Tensile	Yield Strength (0.2% OS)	Elong.	R/A	Hardness Brinell
Min	110 KSi	80 KSi	15%
Max					297
Min	760 MPa	550 MPa
Max

Super Duplex 255 is Stronger Than Most Competitive Alloys

Alloy	UNS	Typical Tensile (Ksi)	Typical Yeild (Ksi)	Typical Elongation (%)
Alloy 255	S32550	126	98	30
SUS316L	S31603	81	42	50
NiCu400	N04400	78	31	50
20Cb-3	N08020	92	47	39
2205 Duplex	S31803	112	75	32

Ferralium 255 – SD50 (Super Duplex 255)
4507
ASTM A276/A476
UNS S32550

Technical Data of Super Duplex 255

Elongation Comparison
Elongation	Alloy 316SS	Alloy 2205	Ferralium Alloy 255
	40	25	15
Hardness Comparison
Wear Resistance	Alloy 316SS	Alloy 2205	Ferralium Alloy 255
Hardness	RB80	RC21	RC28
Critical Pitting Temperature Comparison
Critical Pitting Temperature	Alloy 316SS	Alloy 2205	Ferralium Alloy 255
Degree C ASTM G48-Method A	0	20	40
Pitting Potential – MV Comparison
Temperature	Alloy 316SS	Alloy 2205	Ferralium Alloy 255
50 °C	60	370	No Pitting
60 °C	No Test	No Test	110
60 °C	No Test	No Test	170
Critical Crevice Comparison
Critical Crevice Temperature	Alloy 316SS	Alloy 2205	Ferralium Alloy 255
Degree C ASTM G48-Method B (10% FE CL 6H 0)	-2.5	17.5	22.5
C Ring Stress Cracking Comparison
C Ring Stress Cracking	Alloy 316SS	Alloy 2205	Ferralium Alloy 255
80 Degree C Stressed to 100% Yield Strength, H2S 0.125 Bar, Sour Brine with 46,000 MG/L Chloride	Cracks	Fine Cracks	No Cracks
PREN No. Comparison
Resistance to Localized Corrosion	Alloy 316SS	Alloy 2205	Ferralium Alloy 255
PREN No. CR + 3.3(MO) + 16(N)	23.6	34.5	40
Corrosion Rates Comparison
Corrosion Rates MPY	Alloy 316SS	Alloy 2205	Ferralium Alloy 255
10% Sulfuric Boiling	855	206	40
65% Nitric Boiling	11	21	5

Our Sales & Supplier Network

E Steel has a Wide Global Sourcing and Sales Networking including :
Australia, Pakistan, Malaysia, Singapore, Taiwan, China,Vietnam, Belgium, Japan, South Korea, Philippines, France, United Kingdom, Indonesia, Thailand, Hong Kong, China, Sweden, United States, Dubai, Finland, Brunei,Germany.

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