Grade C45
1.0503
Corresponding Standard NF EN 10083-2-2006
Tempered Non-Alloy Structural Steel
Classification Carbon Steel
C45 Chemical Element Composition Content (%)
Component C Si Mn P S Cr Ni Mo More
Minimum Value 0.42 - 0.5 - - - - - Cr+Mo+Ni≤0.63 ①
Maximum Value 0.5 0.4 0.8 0.045 0.045 0.4 0.4 0.1
C45 Mechanical Properties
condition Heat Treatment or Condition
Tensile Strength
σb
Mpa
Yield Point
σs
Mpa
Elongation or Extension Rate
δ
%
Reduction of Area
ψ
%
Hardness
HBW
Steel: d ≤ 16mm; t ≤ 8mm Quenching + Tempering (+QT) 700~850 ≥490 ≥14 ≥35
Steel: 16mm ≤ d ≤ 40mm; 8mm ≤ t ≤ 20mm Quenching + Tempering (+QT) 650~800 ≥430 ≥16 ≥40
Steel: 40mm ≤ d ≤ 100mm; 20mm ≤ t ≤ 60mm Quenching + Tempering (+QT) 630~780 ≥370 ≥17 ≥45
Steel: d ≤ 16mm; t ≤ 16mm Normalizing (+N) ≥620 ≥340 ≥14
Steel: 16mm ≤ d ≤ 100mm; 16mm ≤ t ≤ 100mm Normalizing (+N) ≥580 ≥305 ≥16
Steel: 100mm ≤ d ≤ 250mm; 100mm ≤ t ≤ 250mm Normalizing (+N) ≥560 ≥275 ≥16
Steel: Processed to a Certain Shearability (+S) ≤255
Steel: Softening Annealing (+A) ≤207
1 Approximate Comparison Table High-Quality Carbon Structural Steel
China Japan United States International Organization for Standardization Germany France European Standard Russia Sweden United Kingdom
GB JIS ASTM ISO DIN EN/DIN NF EN/NF EN Numerical Grade GOST SS BS EN/BS
45 S45C 1042
1045
Gr.1043
C45 C45 AF65C45
C45
C45 1.0503 45 1650 070M46
50HS
2 Approximate Comparison Table High-Quality Carbon Structural Steel
China Japan United States International Organization for Standardization France Russia United Kingdom
GB JIS ASTM/AISI ISO NF EN/NF GOST BS EN/BS
GB/T 699-1999
45
S45C 1045 ISO 630-1:1987
C45
C45E4
C45M2
C45
XC45
45 060A42
060A47

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