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904L/1.4539/UB6/UNS N08904 ASTM A182 B625 A240 Forging Ring
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Corrosion Resistance

Grade 904L stainless steels have excellent resistance to warm seawater and chloride attack. The high resistance of grade 904L against stress corrosion cracking is due to the presence of high amounts of nickel in its composition. Moreover, the addition of copper to these grades develops resistance to sulphuric acid and other reducing agents in both aggressive and mild conditions.

The corrosion resistance of grade 904L is intermediate between super austenitic grades, with 6% molybdenum content, and standard 316L austenitic grades. Grade 904L is less resistant to nitric acid than grades 304L and 310L, which are free of molybdenum. This steel grade needs to be solution treated following cold working, to achieve maximum stress corrosion cracking resistance under critical environments.

Heat Resistance

Grade 904L stainless steels offer good oxidation resistance. However, the structural stability of this grade collapses at high temperatures, particularly above 400°C.

Heat Treatment

Grade 904L stainless steels can be solution heat-treated at 1090 to 1175°C, following by rapid cooling. Thermal treatment is suitable for hardening these grades.

Applications

Some of the major applications of grade 904L stainless steels include:

  • Wiring in electrostatic precipitators
  • Oil refinery components
  • Seawater cooling devices
  • Gas scrubbing plants
  • Pulp and paper processing industries
  • Acetic, phosphoric and sulphuric acid processing plants

Chemical Composition 

Weight % C Mn P S Si Cr Ni Mo  N  Cu
Min.  19,0  24,0  3,00  1,20
Max.  0,020  1,20  0,030  0,010 0,70  21,0  26,0  4,50  0,50  2,00




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Product Details


Product Description

Specifications: ASTM A182 ASTM A705 ASTM A638 ASTM B564 

Sizes: Dia: 3 - 600 mm, Length: 0.5 - 12.0 meter

Condition: Cold-worked, Hot worked, Forged, Solution Annealed

Form: Round, Square, Hex (A/F), Rectangle, Forging,Machining according to drawing

Tolerances: K10, H11, H8, H12, K11, H9, H10, K9, K12, H13



Product Name Nickle alloy and special steel forgings and machining parts
Standard A276 A182 A479 EN10088-3 B160 , B164 , B166, B335, B408, B425, B446, B473, B511, B512, B536, B564, B572, B573, B574, B581, B649, B691 etc.
Material: As below
Diameter 4mm~1200mm
Length Length:Single random length/Double random length
5m-14m,5.8m,6m,10m-12m,12m or at customer's request
Finish Bright, Pickling, Black, Polished,Peeling,Machining
Packing Wooden box, Waterproof polybag
Processing Service Turning / Milling / Planing / Drilling / Boring / Grinding / Gear Cutting / CNC Machining
Delivery Time Usually within 10-45 days after receipt of advance payment


PRODUCT SPECIFICATIONS & MATERIALS

Application Type Grade
Heat-resisting INCONEL 600,601,601GC,617,625,625LCF,718,740,X-750,751,HX
INCOLOY A-286,DS,800,800H,800HT,803,840,864,330
NIMONIC 75,80A,90
Aircraft and steam turbine INCONEL 617,625,625LCF,706,718,718SPF,HX,X-750,783
INCOLOY 903,907,909,A-286
NIMONIC 75,80A,86,90,101,105,108,115,263
UDIMET 188,L605,520,720,R41
WASPALOY -
Corrosion resistance NICKLE 200,201
DURANICKEL 301
MONEL 400,K-500
INCONEL 600,22,625,625LCF,686,690,718,725
HASTELLOY C276,C22,C2000,G35,B2,B3,X
INCOLOY G-3,020,25-6MO,800,825,864,925
Low expansion MEN PD,PDS
INCONEL 783
INCOLOY 903,907,909
Electrothermal NCH 1,2,3
FCH 1,2
CN 30,49
Electronic instruments NICKLE 200,201,212,270
DF 16CN,42N,47N,52N
MEN PB,PC1,PC2,PD
Alloy Steel 4140,4340,4130,F11,F22,F91,F92
Stainless Steel MARTENSITIC 403,410,414,420,431,440,XM 30 2Cr13，2Cr13Ni2，3Cr13
FERRITIC 430,XM-27,446
DUPLEX 2205,2507,S32750,S32760,F55,F51,F60
PH STEEL PH17-4,PH15-5,PH17-7
AUSTENITIC 904L,310S,321,347,254SMo,253Ma,XM-19,N08020,A286


*Processing Service 
   Our company can provide processing service including cutting to size,grinding,milling,turning,boring,drilling,molding,CNC machining etc to required shapes as per clients' drawings.We have successfully supplied shaft,cylinder,hollow bar,pot,piston,guide bar,tubesheet,ring,circle etc to our clients all over the world.
 
PRODUCTION WORKSHOP


We company have professional QC inspection team and full set of inspect equipment including: UT test machine, Tensile testing machine, Hardness testing machine, Dimensional measuring instrument, spectrometer, Metallographic microscope and so on, so that we can always supply good mateterials for various projects and industries, if you have any need for our producrs, please contact us freely. 






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