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Special Steels
Stainless, acid- and heat-resistant steels have an excellent resistance to corrosive media, provide high strength and elongation, and high thermal stability. Stainless steels are commonly divided into five groups: martensitic stainless steels, ferritic stainless steels, austenitic stainless steels, Duplex (ferritic-austenitic) stainless steels, and precipitation-hardening stainless steels. Because of their outstanding properties, they are used in chemical industry, in mechanical engineering, in food industry, and in the energy, medicine, traffic and transport industries.

The properties of this category steel are:

Ravne
SIJ Brand
W. No. DIN AISI/SAE JIS
PK2SP   1.4057 /
1.2728
X 20CrNi 172 /
X 23CrNi 17
431 SUS 431
PK346   1.4542 X 5CrNiCu10b 16-4 630 (17-4 PH) SUS 430
PK348   1.4125 X 105CrMo 17 440C SUS 440C

 

Grades
Average Chemical Compositon %
Ravne
SIJ Brand
Werk No.
Aisi No.
C.
Si.
Mn.
Cr.
Mo.
V.
W.
Co.
Oths.
PK2SP 1.4057/ 1.2728 431 0.15 1.0 1.50 15.5         Ni 1.6
Applications : Shafts, valves, components for dairies, machine building & paper industry. Click here for PDF File.

Grades
Average Chemical Compositon %
Ravne
SIJ Brand
Werk No.
Aisi No.
C.
Si.
Mn.
Cr.
Mo.
V.
W.
Co.
Oths.
PK346 1.4542 630
(17-4PH)
0.07 0.70 1.50 15.5 0.60       Ni 3.25 Nb 0.45 Cu 3.25
Applications : Corrosion-resistance, good machinability. Screws and spindles for fittings, wheels & compressor covers. Click here for PDF File.

Grades
Average Chemical Compositon %
Ravne
SIJ Brand
Werk No.
Aisi No.
C.
Si.
Mn.
Cr.
Mo.
V.
W.
Co.
Oths.
PK348 1.4125 440C 1.0 1.0 1.0 16.5 0.50        
Applications : For hardening, wear resistant. Products with highest hardness & wear resistance, knives, nozzles, medical instruments, ball bearings. Click here for PDF File.




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