38SMnPb28 - ISO 683-4-2016

Grade	38SMnPb28
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

38SMnPb28 Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Pb
Minimum Value	0.35	-	1.2	-	0.24	0.15
Maximum Value	0.4	0.4	1.5	0.06	0.33	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.

38SMnPb28 Mechanical Properties

condition	Heat Treatment or Condition	Tensile Strength σ_b Mpa	Yield Point σ_s Mpa	Elongation or Extension Rate δ %	Hardness HBW
5<d≤10	Untreated (U)	580~780			≤228
10<d≤16	Untreated (U)	580~750			≤219
16<d≤40	Untreated (U)	560~730			≤213
40<d≤63	Untreated (U)	560~730			≤213
63<d≤100	Untreated (U)	550~700			≤204
5<d≤10	Quenching and Tempering	700~850	≥480	≥15
10<d≤16	Quenching and Tempering	700~850	≥460	≥15
16<d≤40	Quenching and Tempering	700~850	≥420	≥15
40<d≤63	Quenching and Tempering	700~850	≥400	≥16
63<d≤100	Quenching and Tempering	630~800	≥380	≥16

Approximate Comparison Table Free-Cutting Structural Steel

International Organization for Standardization	European Standard
ISO	EN	Numerical Grade
38SMnPb28	38SMnPb28	1.0761

38SMnPb28 Corresponding Standards(Same grade name, different standards)

1	EN 10277-3-1999
	38SMnPb28 1.0761
2	DIN EN ISO 683-4-2018
	38SMnPb28
3	ISO 683-4-2016
	38SMnPb28
4	ISO 683-18-2014
	38SMnPb28
5	EN 10277-2018
	38SMnPb28 1.0761
6	NF EN 10087-1999
	38SMnPb28 1.0761

Note: The data is for reference only! If you have any questions, please fill out "I want to correct it"!