quality ASTM A182 UNS S32750 X2CrNiMoN 25-7-4 Steel Forged Flanges factory

ASTM A182 UNS S32750 X2CrNiMoN 25-7-4 Steel Forged Flanges

ASTM A182 UNS S32750 forged flanges offer superior corrosion resistance, stress corrosion cracking immunity, and high durability. Certified to EN 10216-5, ASTM A789/A790 standards with custom seamless/welded options available.

Product Details

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ASTM A182 Steel Forged Flanges

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UNS S32750 Steel Forged Flanges

Product Description

Flanges: ASTM A182 UNS: S32750 Forged Flanges - X2CrNiMoN 25-7-4 Steel Forged Flanges

Material Standards

UNS: S32750
EN Number: 1.4410
EN Name: X 2 CrNiMoN 25-7-4
SS: 2328

Product Standards

Seamless tube and pipe: EN 10216-5
Seamless and welded tube and pipe: ASTM A789; A790
Flanges: ASTM A182
Fittings: ASTM A182; (ASTM A815 applied for)
Plate, sheet and strip: ASTM A240, EN 10088-2
Bar steel: ASTM A479, EN 10088-3
Forged billets: EN 10088-3

Chemical Composition (Nominal)

C	Si	Mn	P	S	Cr	Ni	Mo	N
≤0.030	≤0.8	≤1.2	≤0.025	≤0.015	25	7	4	0.3

Corrosion Resistance

General Corrosion

SAF® 2507 is highly resistant to corrosion by organic acids, exhibiting less than 0.05 mm/year in 10% formic and 50% acetic acid, where ASTM 316L has a corrosion rate higher than 0.2 mm/year. The material maintains resistance even in contaminated acid environments.

Stress Corrosion Cracking

SAF® 2507 demonstrates excellent resistance to chloride-induced stress corrosion cracking (SCC). Testing shows no signs of SCC up to 1000 ppm Cl⁻/300°C and 10000 ppm Cl⁻/250°C. U-bend specimens exposed for 1000 hours in hot brine (108°C, 226°F, 25% NaCl) showed no cracking.

Forms of Supply

Seamless tube and pipe in SAF® 2507 is supplied in dimensions up to 260 mm outside diameter. The delivery condition is solution annealed and either white pickled or bright annealed.

Additional Supply Forms

Welded tube and pipe
Fittings and flanges
Plate, sheet and wide strip
Bar steel
Forged products
Cast products

Heat Treatment

Tubes are normally delivered in heat-treated condition. If additional heat treatment is required due to further processing, the following is recommended:

Solution Annealing: 1050-1125°C (1920-2060°F), rapid cooling in air or water.

Mechanical Properties

The following figures apply to material in the solution annealed condition. Tube and pipe with wall thickness above 20 mm (0.787 in.) may have slightly lower values. For seamless tubes with wall thickness <4 mm, we guarantee proof strength (Rp0.2) values that are 50 MPa higher than standard values at 20°C (68°F) and at higher temperatures.