Grade 35
U20352
Corresponding Standard JB /T 6908-2020
Steel forings for displacement compressors
Classification Carbon Steel
35 Chemical Element Composition Content (%)
Component C Si Mn P S Cr Ni Cu
Minimum Value 0.32 0.17 0.5 - - - - -
Maximum Value 0.39 0.37 0.8 0.035 0.035 0.25 0.3 0.25
35 Mechanical Properties
thickness or diameter
mm
Heat Treatment or Condition
Tensile Strength
σb
Mpa
Specified Plastic Yield Strength
Rp0.2
Mpa
Elongation or Extension Rate
δ
%
Reduction of Area
ψ
%
Hardness
HBW
Impact Energy Absorption
KV2
J
≤ 100 Normalizing or Normalizing + Tempering 510~630 ≥265 ≥18 ≥43 149~187 KU2:≥34
>100~300 Normalizing or Normalizing + Tempering 490~590 ≥255 ≥18 ≥40 149~187 KU2:≥29
>300~500 Normalizing or Normalizing + Tempering 470~590 ≥235 ≥17 ≥37 143~187 KU2:≥29
>500~750 Normalizing or Normalizing + Tempering 450~590 ≥225 ≥16 ≥32 137~187 KU2:≥20
>750~1000 Normalizing or Normalizing + Tempering 430~590 ≥215 ≥15 ≥28 137~187 KU2:≥20
≤ 100 Tempering 550~700 ≥320 ≥20 ≥48 196~241 KU2:≥47
>100~300 Tempering 530~640 ≥295 ≥22 ≥40 189~229 KU2:≥40
>300~500 Tempering 490~640 ≥275 ≥21 ≥37 163~219 KU2:≥38

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