1: Product Details
Alloy 2507 is a super duplex stainless steel with 25% chromium, 4% molybdenum, and 7% nickel designed for demanding
applications which require exceptional strength and corrosion resistance, such as chemical process, petrochemical, and
seawater equipment. The steel has excellent resistance to chloride stress corrosion cracking, high thermal conductivity and
a low coefficient of thermal expansion. The high chromium, molybdenum, and nitrogen levels provide excellent resistance to
pitting, crevice, and general corrosion.
The impact strength is also high. Alloy 2507 is not recommended for applications which require long exposures to
temperatures above 570°F because of the risk of a reduction in toughness.
Corrosion Resistance:
General Corrosion:
★high chromium and molybdenum content of 2507 makes it extremely resistant to uniform corrosion by organic acids.
★provides excellent resistance to inorganic acids, especially those containing chlorides.
★can be used in dilute hydrochloric acid.
★Pitting need not be a risk in the zone below the borderline in this figure, but crevices must be avoided.
Intergranural Corrosion:
★Low carbon content greatly lowers the risk of carbide precipitation at the grain boundaries during heat treatment.
★Is highly resistant to carbide-related intergranular corrosion.
Stress Corrosion Cracking:
★Duplex structure of 2507 provides excellent resistance to chloride stress corrosion cracking (SCC).
★Superior to 2205 in corrosion resistance and strength.
★2507 is especially useful in offshore oil and gas applications and in wells with either naturally high brine levels
or where brine has been injected to enhance recovery.
Pitting Corrosion:
★Different testing methods can be used to establish the pitting resistance of steels in chloride-containing solutions.
Crevice Corrosion:
★Highly resistant to crevice corrosion.
Standards:
ASTM/ASME ...… A240 - UNS S32750
EURONORM...... 1.4410 - X2 Cr Ni MoN 25.7.4
AFNOR......... Z3 CN 25.06 Az
| Chemical Composition Limits |
| Cr |
Ni |
Mo |
C |
N |
Mn |
| 24-26 |
6-8 |
3-5 |
0.03 Max |
0.24-0.32 |
1.2 Max |
| Si |
Cu |
P |
S |
Fe |
|
| 0.8 Max |
0.5 Max |
0.035 |
0.02 Max |
Bal |
|
Other Grades:
201,202,21-4N,301,302,301L,303,303Se,304,304L,304H,304LN,304N,305,S38400,308,309,309S,310,310s,
316,316L,316H,316Ti,316N,316LN,317,317L,317LMN,317LN,321,321H,347,347H,S3100,S31803,S3205,
S32304,S31200,S31260,S32507,405,409,429,430,430F,434,444,403,410S,410,416,420,420F,431F,440A
440B,440C,440F,610,630,631,632,635,660,Alloy 200,Monel 400 ,Alloy K-500 ,Inconel 600 , Incconel 601,
Inconel 625 , Inconel 718 , Alloy 800 ,Alloy 800H,Alloy 800HT,Inconel 825,Alloy 276, Alloy 20, Alloy 59
2: Stainless Steel Plate Process
3: Package & Shipping
4: Company Introduction
5: Contact Us
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