Chemical Specification Of Commonly Cast Heat Resistant Alloys

Transcription

1 hemical Specificatin Of mmnly ast Heat Resistant Allys lsest Equivalent Ally IS 4522 lsest DIN ASTM - A297 Gr % Ni % r % M % Si % Mn% thers % Applicatins HA Gd xidatin resistance upt 650. Used in il refining industry. 28/4 - - H Gd sulphur and xidatin resistance upt Minimal lad bearing capacity. 5/ HD an be used in high sulphur applicatin (avid at ) upt / HE Mre ductile and higher crrsin resistance (avid at 815) upt 1050 fr high S atmsphere. 9/ HF Suitable fr applicatins requiring high strength &

2 crrsin resistance at 6500 t / HH Suitable fr applicatins between 9270 and Nt t be used frm 7500 t 8900 and fr peratins invlving thermal shck & carburizing cnditins. 12/ HH Type Same as HH but with superir creep resistance and reduced ductility. Used frm 650 t 1000 under cnstant temperature cnditins. 15/ HI Higher crrsin resistance and higher strength at temperature upt 1050 (avid 815). 20/ HK Suitable fr stressed parts wrking upt 1100 such as billet skids, heat treating trays & fixtures. Unsuited at 815 and in peratins invlving thermal shcks. 20/ HK Same as HK but with better creep strength. AISI Same as HK but Si increased fr greater resistance t carburizatin. HKNb - - HK40 Nb Nb - 24/24 Nb IN Nb Same as HK 40 but with

3 resistance upt / HL Higher crrsin resistance and higher strength at temperature upt 1100 (avid 815). 25/ HN Suitable fr applicatins upt 1100 fr furnace parts such as grates, etc. with increased ductility. 32/20 Nb astally 800H Nb Suitable fr maniflds and headers. Service limit upt 980 with increased ductility. 35/ HP Resistant t bth xidizing and carburizing atmspheres at high temperatures upt /25 Nb HP mdified W, Nb Same as HP but with resistance upt Suitable fr refrmer ethylene furnace tubes, radiant tubes, etc. HP-M / HT Suitable fr highly stressed parts upt 1095 including fr carburizing peratins. High sulphur gases and thermal shcks are detrimental. 39/ HU Suitable fr applicatins upt 1095 including fr

4 carburizing peratins. an withstand crrsive applicatins with rapid thermal cycles. 45/30 Nbw W Nb Useful fr cmpnents perating in ht zne f pyrlysis cils and cmpnents f Refrmer utlet manifld service limit H W Same as HP but with resistance upt Suitable fr radiant tubes, air injectin tubes, refrmer tubes and fittings fr petrchemical furnaces, tube sheets, tube supprts, etc. Super 22H W, Same as 22H but with resistance upt / HW Excellent thermal shck resistance and resistance t carburisatin up t 1040 where sulphur is nt present. 66/ HX Fr severe service applicatins upt 1150 where crrsin resistance is required. anally Bushes & sleeves fr ht dip galvanizing line. anally ntrlled Manganese S 0.03 P Bushes & sleeves fr ht dip galvanizing line.

5 UMO , Bal Fe Furnace parts in heattreating furnaces, slag ntch rings and tundishes. balt Ally 6 - R s 3.0 Fe, W, Bal Wear plates and bars, bushes & sleeves fr peratin in ht & crrsive atmsphere, where lubricatin is impssible, with superir perfrmance. balt Ally 12 - R W, 3.0 Fe, Bal utting tls and bushes & sleeves fr peratin in ht & crrsive atmsphere, where lubricatin is impssible, with superir perfrmance. balt Ally Special , W, Fe Fr better sliding wear prperty. Hardness is between 375 t 432 HRB. 40 Ni 60 rnb R ASTM A560 Gr 40/60 Nb 0.10 Balance P, 0.02 S, 0.3 N, Fe, Al, 0.25 Nb - 50 Ni 50 rnb ASTM A560 Gr 50/50 Nb 0.10 Balance Nb, 0.02 P, 0.02 S, Fe Suitable fr applicatins upt 9500 in furnace parts. an withstand fuel ash crrsin. Gd creep strength and gd resistance t xidatin and carburizatin. 60 Ni 40 rnb - - ASTM A560 Gr 60/40 Nb Fr heat resisting and elevated temperature crrsin resistance applicatin such as tube hangers.

6 Y-40 (70Ni15r) - - ASTM A494 Gr Y Balance Fe Frequently used fr elevated temperature fittings in cnjunctin with Incnel. Suitable fr biler feed water plants and where high strength, high resistance t wear, crrsin and xidatin at elevated temperatures is required.