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40BApplication:China structural steel and alloy steel
CategoryTypeSteel gradeStandardCountry
Grades Special Alloy 40BGBTChina

Chemical composition%of the ladle analysis of grade40B

C(%)Si(%)Mn(%)B(%)
0.37-0.440.17-0.370.60-0.900.0005-0.0035
40B
Mechanical properties of grade40B
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 ConditionBrinell hardness(HBW)
537(≥)486(≥)314244Solution and Aging,Annealing,Ausaging,Q+T,etc412
Physical properties of grade40B
PropertyDensity
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
464(≥)725(≥)441434Solution and Aging,Annealing,Ausaging,Q+T,etc243
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0)N/mm2
Creep rupture strength
(10000h)
(Rp1,0)N/mm2
838788682
40BRange of products
Product typeProductsDimensionProcessesDeliver Status
Plates/SheetsPlates/Sheets0.08-200mm(T)*W*LForging,hot rolling and cold rollingAnnealed,Solution and Aging,Q+T,ACID-WASHED,Shot Blasting
Steel BarRound Bar,Flat Bar,Square BarΦ8-1200mm*LForging,hot rolling and cold rolling,CastBlack,Rough Turning,Shot Blasting,
Coil/StripSteel Coil/Steel Strip0.03-16.0x1200mmCold-Rolled&Hot-RolledAnnealed,Solution and Aging,Q+T,ACID-WASHED,Shot Blasting
Pipes/TubesSeamless Pipes/Tubes,Welded Pipes/TubesOD:6-219mm x WT:0.5-20.0mmHot extrusion,Cold Drawn,WeldedAnnealed,Solution and Aging,Q+T,ACID-WASHED
Cross Reference Table(Equivalent Grade)
GradeStandardCountryApplication
A 276 S44003GBTChina
Stainless Steel Bars and Shapes
A 314 S44003GBTChina
Stainless Steel Billets and Bars for Forging
A 473 S44003GBTChina
Stainless Steel Forgings
A 580 S44003GBTChina
Stainless Steel Wire
S44003GBTChina
Hardenable Chromium Stainless Steel
SUS 440BGBTChina
Stainless steel bars
STS440BGBTChina
Stainless steel bars
440BGBTChina
Stainless steel bars
ASTM440BGBTChina
ASTM440B
AISI440BGBTChina
AISI440B

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