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ASTM HS 556 Details

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HS 556 Application:Alloy, Corrosion and Heat-Resistant, Sheet, Strip, and Plate 29Fe - 22Cr - 21Ni - 18.5Co - 3.2Mo - 2.8W - 0.78Ta - 0.30Al - 0.05Zr - 0.05La - 0.20N Solution Heat Treated

Category Type Grade Microstructure Designations
Grades Stainless Steels HS 556 Precipitation-Hardening USA - ASTM , SAE AMS 5874C (2007) - Alloy, Corrosion and Heat-Resistant, Sheet, Strip, and Plate 29Fe - 22Cr - 21Ni - 18.5Co - 3.2Mo - 2.8W - 0.78Ta - 0.30Al - 0.05Zr - 0.05La - 0.20N Solution Heat Treated

Chemical composition(wt.%) of HS 556 grade: SAE AMS 5874C (2007)

Elements Min.(≥) Max.(≤) Similar Remarks
C 0.05 0.15
Si 0.20 0.80
Mn 0.50 2.00
Ni 19.00 22.50
Cr 21.00 23.00
Al 0.10 0.50
Cu - -
Ti - -
Fe - remaining
Mo 2.50 4.00
Co 16.00 21.00
W 2.00 3.50
Alloy, Corrosion and Heat-Resistant, Sheet, Strip, and Plate 29Fe - 22Cr - 21Ni - 18.5Co - 3.2Mo - 2.8W - 0.78Ta - 0.30Al - 0.05Zr - 0.05La - 0.20N Solution Heat Treated

Mechanical properties of grade HS 556 SAE AMS 5874C (2007)

Proof strength
Rp0.2 (MPa)
Tensile strength
Rm (MPa)
Impact energy
KV (J)
Elongation at fracture
A (%)
Reduction in cross section on fracture
Z (%)
As-Heat-Treated Condition Brinell hardness (HBW)
453 (≥) 385 (≥) 24 12 11 Solution and Aging, Annealing, Ausaging, Q+T,etc 111

Physical properties of grade HS 556 SAE AMS 5874C (2007)

Property Density
kg/dm3
Temperature T
°C/F
Specific heat
J / kgK
Thermal conductivity
W/mK
Electric resistance
µΩ·cm
Modulus of elasticity
kN/mm2
Expansion rate
286 (≥) 326 (≥) 33 14 41 Solution and Aging, Annealing, Ausaging, Q+T,etc 414
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0) N/mm2
Creep rupture strength
(10000h)
(Rp1,0) N/mm2
164 771 879

HS 556 - Form of Supply

Product type Products Dimension Processes Deliver Status
Plates / Sheets Plates / Sheets 0.08-200mm(T)*W*L Forging, hot rolling and cold rolling Annealed, Solution and Aging, Q+T, ACID-WASHED, Shot Blasting
Steel Bar Round Bar, Flat Bar, Square Bar Φ8-1200mm*L Forging, hot rolling and cold rolling, Cast Black, Rough Turning, Shot Blasting,
Coil / Strip Steel Coil /Steel Strip 0.03-16.0x1200mm Cold-Rolled & Hot-Rolled Annealed, Solution and Aging, Q+T, ACID-WASHED, Shot Blasting
Pipes / Tubes Seamless Pipes/Tubes, Welded Pipes/Tubes OD:6-219mm x WT:0.5-20.0mm Hot extrusion, Cold Drawn, Welded Annealed, Solution and Aging, Q+T, ACID-WASHED

Cross Reference Table(Equivalent Grade)

Grade Standard Country Application
HS-21 UNS USA
Special Purpose Alloys ("Superalloys")
HS-31 UNS USA
Special Purpose Alloys ("Superalloys")
HS 556 ASTM USA
Alloy, Corrosion and Heat-Resistant, Sheet, Strip, and Plate 29Fe - 22Cr - 21Ni - 18.5Co - 3.2Mo - 2.8W - 0.78Ta - 0.30Al - 0.05Zr - 0.05La - 0.20N Solution Heat Treated
HS 556 ASTM USA
Iron Alloy, Corrosion and Heat-Resistant, Bars, Forgings, and Rings 29Fe - 22Cr - 21Ni - 18.5Co - 3.2Mo - 2.8W - 0.78Ta - 0.30Al - 0.05La - 0.20N Solution Heat Treated
HS 556 ASTM USA
Alloy, Corrosion and Heat-Resistant, Welding Wire 29Fe - 22Cr - 21Ni - 18.5Co - 3.2Mo - 2.8W - 0.78Ta 0.30Al - 0.05Zr - 0.05La - 0.20N
HS 556 UNS USA
Alloy, Corrosion and Heat-Resistant, Sheet, Strip, and Plate 29Fe - 22Cr - 21Ni - 18.5Co - 3.2Mo - 2.8W - 0.78Ta - 0.30Al - 0.05Zr - 0.05La - 0.20N Solution Heat Treated
HS 556 UNS USA
Iron Alloy, Corrosion and Heat-Resistant, Bars, Forgings, and Rings 29Fe - 22Cr - 21Ni - 18.5Co - 3.2Mo - 2.8W - 0.78Ta - 0.30Al - 0.05La - 0.20N Solution Heat Treated
HS 556 UNS USA
Alloy, Corrosion and Heat-Resistant, Welding Wire 29Fe - 22Cr - 21Ni - 18.5Co - 3.2Mo - 2.8W - 0.78Ta 0.30Al - 0.05Zr - 0.05La - 0.20N
HS 25 AMS USA
Cobalt Alloy, Corrosion and Heat-Resistant, Welding Wire, 52Co - 20Cr - 10Ni - 15W
Alloy L605 AMS USA
Cobalt Alloy, Corrosion and Heat-Resistant, Welding Wire, 52Co - 20Cr - 10Ni - 15W
R30605 UNS USA
Co-Cr-Ni-W alloy

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