Haynes556/UNS R30556
 

Form	ASTM
Rod	B 572
Plate, sheet and strip	B 435, B 906
Seamless pipe and tube	B 622
Welded pipe	B 619, B 775
Welded tube	B 626, B 751
Welding fitting	B 366
Billet and bar for reforging	B 472

Chemical composition

%	Fe	Cr	Ni	Co	Mo	W	C	Mn	Si
min	balance	21.0	19.0	16.0	2.5	2.0	0.05	0.50	0.20
max		23.0	22.5	21.0	4.0	3.5	0.15	2.00	0.80
%	P	S	Al	Ta	Nb	La	Zr	N	B
min			0.10	0.30		0.005	0.001	0.10
max	0.040	0.015	0.50	1.25	0.30	0.10	0.10	0.30	0.020

Physical properties
 

Density	8.23 g/cm3
Melting range	1330-1415℃

Features: Haynes 556 combines effective resistance to sulfidizing, carburizing and chlorine-bearing environments at high temperatures with good oxidation resistance, fabricability and excellent high temperature strength. It also resists to corrosion by molten zinc, molten chloride salts and other salts.
Applications: Industrial waste incinerators, rotary calciners and kilns, hot-dip galvanizing equipment, aerospace industry high temperature components.
Note: Haynes and 556 are registered trademarks of Haynes International, Inc.