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Description

USA ASTM HD Steel Castings, Iron-Chromium and Iron-Chromium-Nickel,Heat Resistant, for General Application and HD Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Special Alloy: HD
Category Type Steel Grade Standard Country Application
Steel GradesSpecial Alloy HD ASTM USA Steel Castings, Iron-Chromium and Iron-Chromium-Nickel,Heat Resistant, for General Application
HF
HH
HI
HK
HE
HT
HU
HW
HX
HC

Chemical composition(mass fraction)(wt.%) of the HD

C(％) Si(％) Mn(％) P(％) S(％) Cr(％) Ni(％) Mo(％)
≤0.50 2 1.5 0.04 0.04 26.0-30.0 4.0-7.0 0.5

Mechanical Properties of steel grade HD

Yield
Rp0.2 (MPa)		 Tensile
Rm (MPa)		 Impact
KV/Ku (J)		 Elongation
A (%)		 Reduction in cross section on fracture
Z (%)		 As-Heat-Treated Condition Brinell hardness (HBW)
823 (≥) 649 (≥) 13 34 23 Solution and Aging, Annealing, Ausaging, Q+T,etc 413

Physical Properties of steel grade HD

Temperature
(°C)		 Modulus of elasticity
(GPa)		 Mean coefficient of thermal expansion 10-6/(°C) between 20(°C) and Thermal conductivity
(W/m·°C)		 Specific thermal capacity
(J/kg·°C)		 Specific electrical resistivity
(Ω mm²/m)		 Density
(kg/dm³)		 Poisson’s coefficient, ν
34 - -     0.42 -  
597 553 - 23.3 241   -  
971 - 23 43.2   322 224

Heat Treatment of steel grade HD

Heat treated : 1982°C - 1798°C

Technological Curves of steel grade HD

Cross Reference Table (Equivalent Grade) of HD

Grade Standard Country Application
ASTM HD AISI USA
SPHD CNS China China Taiwan Structural steel
HD ASTM USA Steel Castings, Iron-Chromium and Iron-Chromium-Nickel,Heat Resistant, for General Application
HD ASTM USA Steel Castings, Iron-Chromium and Iron-Chromium-Nickel,Heat Resistant, for General Application
HC HL
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