C50M2 C50M2H C50M2HH5 - ISO 683-1-1987

Grade	C50M2
Other Names
Corresponding Standard	ISO 683-1-1987 Heat-Treatable Steels,alloy Steels and Free-Cutting Steels. Part 1:Direct-Hardening Unalloyed and Low-Alloyed Wrought Steel in Form of Different Black Produts
Classification	Carbon Steel

C50M2 Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S
Minimum Value	0.47	0.1	0.6	-	0.02
Maximum Value	0.55	0.4	0.9	0.035	0.04

• The designations are in accordance with the system proposed by ISO/TC 17/SC 2.
• Elements not quoted should not be intentionally added to the steel without the agreement of the purchaser, other than for the purpose of finishing the heat. All reasonable precautions should be taken to prevent the addition, from scrap or other material used in manufacture, of such elements which affect the hardenability, mechanical properties and applicability.
• In the case of the grades with specified hardenability requirements (see tables 5 to 7), except for phosphorous and sulfur, insignificant deviations from the limits for cast analysis are permissible; these deviations shall, however, not exceed in the case of carbon ± 0,01 % (m/m) and in all other cases the values according to table 4.
• For boron-treated steels, see ISO 4954.
• Steels with improved machinability by either lead additions or higher sulfur levels up to about 0,100 % (m/m) S (including controlled sulfide morphology) may be available on request.

C50M2 Mechanical Properties

diameter d mm	Heat Treatment or Condition	Tensile Strength σ_b Mpa	Yield Point σ_s Mpa	Elongation or Extension Rate δ %
d≤16	Quenching + Tempering	750~900	≥520	≥13
16＜d≤40	Quenching + Tempering	700~850	≥460	≥15
40＜d≤100	Quenching + Tempering	650~800	≥400	≥16

1 Approximate Comparison Table Non-Alloy Steel for Quenching and Tempering

United States	International Organization for Standardization	Germany	European Standard
ASTM	ISO	DIN EN/DIN	EN	Numerical Grade
1050	C50R C50M2	Cm50	C50R	1.1241

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 50	S50C	1049 1050	ISO 630-1:1987 C50 C50E4 C50M2	C50 XC48	50	060A52

C50M2 Corresponding Standards(Same grade name, different standards)

1	ISO 683-18-1996
	C50M2
2	ISO 683-1-1987
	C50M2 C50M2H C50M2HH5 C50M2HL5

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