Chemical composition Element Weight percent Element Weight percent Fe Balance, about 31 Ni 20 Cr 22 Co 18 Mo 3 W 2.5 Ta 0.6 N 0.2 Si 0.4 Nb 0.3 max Mn 1 Al 0.2 C 0.1 B 0.02 max La 0.02 Zr 0.02

Mechanical properties Hot-rolled, solution-annealed plate. Manufacturer typical tensile data; final solution treatment is normally about 1175°C, with holding time matched to thickness. Test temperature °C 0.2% yield MPa Tensile MPa Elongation % RT 373 790 51.3 649 229 601 55.1 760 234 435 57.4 871 185 258 87.9 Source: Haynes International 556 alloy data. Typical values; not purchase acceptance limits.

Application areas Waste incineration and thermal processing equipment Rotary calciners and carbon regenerators High-sulfur petroleum processing equipment Hot-dip galvanizing fixtures, spinners and baskets Furnace fans, coil annealing furnace covers and diesel air preheaters

Chemical composition Element Weight percent Element Weight percent Fe Balance, about 31 Ni 20 Cr 22 Co 18 Mo 3 W 2.5 Ta 0.6 N 0.2 Si 0.4 Nb 0.3 max Mn 1 Al 0.2 C 0.1 B 0.02 max La 0.02 Zr 0.02

Mechanical properties Hot-rolled, solution-annealed plate. Manufacturer typical tensile data; final solution treatment is normally about 1175°C, with holding time matched to thickness. Test temperature °C 0.2% yield MPa Tensile MPa Elongation % RT 373 790 51.3 649 229 601 55.1 760 234 435 57.4 871 185 258 87.9 Source: Haynes International 556 alloy data. Typical values; not purchase acceptance limits.

Application areas Waste incineration and thermal processing equipment Rotary calciners and carbon regenerators High-sulfur petroleum processing equipment Hot-dip galvanizing fixtures, spinners and baskets Furnace fans, coil annealing furnace covers and diesel air preheaters

Alloy 556/UNS R30556

Grade: Haynes 556/UNS R30556

Sheet/Plate: 0.3mm-150mm

Strip/Foil: 0.02mm-16mm

Pipe: 6mm*0.5mm-1200mm*100mm

Bar: Ф6mm – Ф600mm

Wire: Ф0.01mm – Ф6mm

Others: Forged Rings, Flanges, Elbows, Tees, Reducers etc.

Standard: ASTM/ASME/AMS

HAYNES 556 is an iron-base alloy containing substantial nickel, chromium and cobalt. It combines high-temperature strength with resistance to sulfidation, carburization and chlorine-bearing environments. The alloy also resists selected molten salts and molten zinc, supporting industrial thermal processing applications. Good fabrication and welding characteristics make it practical for furnace hardware, chemical process equipment and components exposed to mixed high-temperature corrosion mechanisms.

Chemical composition

Element	Weight percent	Element	Weight percent
Fe	Balance, about 31	Ni	20
Cr	22	Co	18
Mo	3	W	2.5
Ta	0.6	N	0.2
Si	0.4	Nb	0.3 max
Mn	1	Al	0.2
C	0.1	B	0.02 max
La	0.02	Zr	0.02

Mechanical properties

Hot-rolled, solution-annealed plate. Manufacturer typical tensile data; final solution treatment is normally about 1175°C, with holding time matched to thickness.

Test temperature °C	0.2% yield MPa	Tensile MPa	Elongation %
RT	373	790	51.3
649	229	601	55.1
760	234	435	57.4
871	185	258	87.9

Source: Haynes International 556 alloy data. Typical values; not purchase acceptance limits.

Application areas

Waste incineration and thermal processing equipment
Rotary calciners and carbon regenerators
High-sulfur petroleum processing equipment
Hot-dip galvanizing fixtures, spinners and baskets
Furnace fans, coil annealing furnace covers and diesel air preheaters

Introduction

Specification

Chemical composition

Element	Weight percent	Element	Weight percent
Fe	Balance, about 31	Ni	20
Cr	22	Co	18
Mo	3	W	2.5
Ta	0.6	N	0.2
Si	0.4	Nb	0.3 max
Mn	1	Al	0.2
C	0.1	B	0.02 max
La	0.02	Zr	0.02

Mechanical

Mechanical properties

Hot-rolled, solution-annealed plate. Manufacturer typical tensile data; final solution treatment is normally about 1175°C, with holding time matched to thickness.