35S20 - ISO 683-4-2016

Grade	35S20
Corresponding Standard	ISO 683-4-2016 Heat-Treatable Steels, Alloy Steels and Free-Cutting Steels — Part 4: Free-Cutting Steels
Classification	Carbon Steel
Properties	Good Machinability High Hardenability

35S20 Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S
Minimum Value	0.32	-	0.7	-	0.15
Maximum Value	0.39	0.4	1.1	0.06	0.25

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.

35S20 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)	550~720			≤210
10<d≤16	Untreated (U)	550~720			≤204
16<d≤40	Untreated (U)	520~680			≤198
40<d≤63	Untreated (U)	520~670			≤196
63<d≤100	Untreated (U)	500~650			≤190
5<d≤10	Quenching and Tempering	630~780	≥430	≥15
10<d≤16	Quenching and Tempering	630~780	≥430	≥15
16<d≤40	Quenching and Tempering	600~750	≥380	≥16
40<d≤63	Quenching and Tempering	550~700	≥320	≥17
63<d≤100	Quenching and Tempering	550~700	≥320	≥17

New and Old Grade Replacement List

Corresponding Standard	Grade
ISO 683-9-1988	Grade ISO Numeric Designation
ISO 683-4-2016	Grade

1 Approximate Comparison Table Free-Cutting Structural Steel

China		United States	International Organization for Standardization	Germany		France	European Standard		Sweden	United Kingdom
GB	ISC	ASTM/AISI	ISO	DIN EN/DIN	W-Nr.	NF EN/NF	EN	Numerical Grade	SS₁₄	BS EN/BS
Y35 Y30	U70352	1140	35S20	35S20	1.0726	35MF6	35S20	1.0726	1957	212M36

2 Approximate Comparison Table Free-Cutting Structural Steel

China	United States	International Organization for Standardization	Germany	France	European Standard		Sweden	United Kingdom
GB	ASTM	ISO	DIN EN/DIN	NF EN/NF	EN	Numerical Grade	SS	BS EN/BS
Y35	1140	35S20	35S20	35MF6	35S20	1.0726	1957-03	212M36

35S20 Corresponding Standards(Same grade name, different standards)

1	ISO 683-9-1988
	35S20 Type 7
2	EN 10087-1999
	35S20 1.0726
3	EN 10277-3-1999
	35S20 1.0726
4	DIN 1651-1988
	35S20 1.0726
5	DIN EN ISO 683-4-2018
	35S20
6	ISO 683-4-2016
	35S20
7	ISO 683-18-2014
	35S20
8	EN 10277-2018
	35S20 1.0726
9	NF EN 10087-1999
	35S20 1.0726

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