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4A,4Q

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3A,3Q 5N
#4A #4Q

Description

USA ASTM 4A,4Q Carbon and Low Alloy Steel for General Application, and Cobalt Alloy for High Strength at Elevated Temperatures and 4A,4Q Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Special Alloy: 4A,4Q
Category Type Steel Grade Standard Country Application
Steel GradesSpecial Alloy 4A,4Q ASTM USA Carbon and Low Alloy Steel for General Application, and Cobalt Alloy for High Strength at Elevated Temperatures
J03501
J02501
Gr 485
Gr 620
Gr 825
Grade21
Grade31
1A
2A,2Q
3A,3Q

Chemical composition(mass fraction)(wt.%) of the 4A,4Q

C(％) Si(％) Mn(％) P(％) S(％)
0.45-0.55 0.20-1.00 0.70-1.00 0.04 0.045

Mechanical Properties of steel grade 4A,4Q

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)
529 (≥) 961 (≥) 33 43 31 Solution and Aging, Annealing, Ausaging, Q+T,etc 332

Physical Properties of steel grade 4A,4Q

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
14 - -     0.22 -  
257 444 - 21.3 223   -  
355 - 13 44.2   234 234

Heat Treatment of steel grade 4A,4Q

Heat treated : 1344°C - 1487°C

Technological Curves of steel grade 4A,4Q

Cross Reference Table (Equivalent Grade) of 4A,4Q

Grade Standard Country Application
SUS304A JIS Japan martensitic stainless steel
Z3CMD22-05-04Az AFNOR France Stainless Steel Plate & Steel Strip
Z3CN23-04Az AFNOR France Stainless Steel Plate & Steel Strip
Z3CND19-14Az AFNOR France Stainless Steel Plate & Steel Strip
Z3CMND22-05-04Az AFNOR France Hot-Rolled stainless steel bar and wire rod (NF A 35-574 (1990))
Z3CNU23-04Az AFNOR France Hot-Rolled stainless steel bar and wire rod (NF A 35-574 (1990))
Z3CMND22-05-04Az AFNOR France Boiler & Pressure Vessel Plate (NF A 35-209(1992))
10X14AΓl5 Austenitic
ASTM 4A,4Q AISI USA
17MoCrNi14AT STAS/SR Romania Alloy structural steel
St03FK4a ONORM Austria Austrian structural steel
ML04Al GBT China China structural steel and alloy steel
STKM14A CNS China China Taiwan Structural steel
4A,4Q ASTM USA Carbon and Low Alloy Steel for General Application, and Cobalt Alloy for High Strength at Elevated Temperatures
4A,4Q ASTM USA Carbon and Low Alloy Steel for General Application, and Cobalt Alloy for High Strength at Elevated Temperatures
ASTM 14Q AISI USA
OL34q STAS/SR Romania Structural steel
17MoCrNi14q STAS/SR Romania Alloy structural steel
17MoCrNi14q STAS/SR Romania Alloy structural steel
3A,3Q 5N
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