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9Q

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8Q 10Q
#9Q

Description

USA ASTM 9Q Carbon and Low Alloy Steel for General Application, and Cobalt Alloy for High Strength at Elevated Temperatures and 9Q Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Special Alloy: 9Q
Category Type Steel Grade Standard Country Application
Steel GradesSpecial Alloy 9Q ASTM USA Carbon and Low Alloy Steel for General Application, and Cobalt Alloy for High Strength at Elevated Temperatures
Grade21
Grade31
1A
2A,2Q
3A,3Q
4A,4Q
5N
6N
7Q
8Q

Chemical composition(mass fraction)(wt.%) of the 9Q

C(％) Si(％) Mn(％) P(％) S(％) Cr(％) Ni(％) Mo(％)
0.25-0.35 0.20-0.80 0.40-0.70 0.04 0.045 0.70-0.90 1.65-2.00 0.20-0.30

Mechanical Properties of steel grade 9Q

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)
522 (≥) 353 (≥) 13 31 22 Solution and Aging, Annealing, Ausaging, Q+T,etc 143

Physical Properties of steel grade 9Q

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
22 - -     0.31 -  
386 835 - 32.3 213   -  
786 - 21 32.2   334 114

Heat Treatment of steel grade 9Q

Heat treated : 1854°C - 1223°C

Technological Curves of steel grade 9Q

Cross Reference Table (Equivalent Grade) of 9Q

Grade Standard Country Application
ASTM 9Q AISI USA
15Cr9q STAS/SR Romania Alloy structural steel
9Q ASTM USA Carbon and Low Alloy Steel for General Application, and Cobalt Alloy for High Strength at Elevated Temperatures
9Q ASTM USA Carbon and Low Alloy Steel for General Application, and Cobalt Alloy for High Strength at Elevated Temperatures
8Q 10Q
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Jiangyou Longhai Special Steel Co.,Ltd.
Jiangyou Longhai Special Steel Co.,Ltd.

Our main peoducts of steel are many kinds of special steel, like tool steel, mould steel, alloy steel, alloy constructural steel, heat-resistant steel, high speed tool steel,spring steel and bearing steel , stainless steel and so on, which have formed 12 series and more than 350 varieties with n...

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