Grade 35SMnPb20
Corresponding Standard ISO 683-4-2016
Heat-Treatable Steels,Alloy Steels and Free-Cutting Steels--Part 4: Free-Cutting Steels
Classification Alloy Steel
Properties Machinability Quench Hardness
35SMnPb20 Chemical Element Composition Content (%)
Component C Si Mn P S Pb
Minimum Value 0.32 - 0.9 - 0.15 0.15
Maximum Value 0.39 0.4 1.4 0.06 0.25 0.35
①Elements not quoted shall not be intentionally added to the steel without the agreement of the purchaser except for finishing the cast. All reasonable precautions are to be taken to avoid the addition of such elements from scrap and other materials used in manufacture which affect the mechanical properties and the suitability. However, if agreed, the manufacturer can add elements such as Ca, Se,Te, etc. for the purpose of improving the machinability. These elements have to be reported in the inspection document.
35SMnPb20 Mechanical Properties
condition Heat Treatment or Condition
Tensile Strength
σb
Mpa
Yield Point
σs
Mpa
Elongation or Extension Rate
δ
%
Hardness
HBW
5<d≤10 Untreated (U) 580~770 ≤225
10<d≤16 Untreated (U) 580~770 ≤225
16<d≤40 Untreated (U) 560~750 ≤219
40<d≤63 Untreated (U) 560~740 ≤216
63<d≤100 Untreated (U) 550~740 ≤216
10<d≤16 Quenching and Tempering 620~820 ≥420 ≥14
16<d≤40 Quenching and Tempering 590~790 ≥365 ≥16
40<d≤63 Quenching and Tempering 540~740 ≥335 ≥17
35SMnPb20 Corresponding Standards(Same grade name, different standards)

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