Product Categories

:86-371-86151827 86151527
:0086-371-86011881
:[email protected]
:bebonchina

Henan Bebon Iron&Steel Co.,Ltd is a steel-bar-specialized factory, located in zhengzhou city, south of henan province. Found in 2000, it takes an area of 520,000 square meters.

Home > News > Company News > ViewsBEBON holds professional knowledge training every Thursday

BEBON holds professional knowledge training every Thursday

In order to improve the ability of our professional knowledge, every Thursday in December, our sales manager would give us a training for the steel knowledge. The training is mainly for the material. On 19th December, the content of training was 20Mn round bar. Through this training, I have a deeper understand for the material 20Mn.

The material 20Mn is a kind of high manganese low carbon steel penetration under the standard GB/T 699-1988.

20Mn Chemical composition %:

Grade	Chemical composition %:
Grade	C	Si	Mn	S	P	Cr	Ni	Cu
20Mn	0.17-0.24	0.17-0.37	0.7-1.00	≤0.035	≤0.035	≤0.25	≤0.25	≤0.25

20Mn mechanical properties:

Grade	mechanical properties:
	Tensile strength σ b (Mpa)	Yield strength σ b (Mpa)	Elongation σ b (%)	reduction of area ψ (%)	Hardness No heat treatment
	min	min	min	min	max
20Mn	450(46)	275(28)	24	50	197HB

Notes:
1,Specification: DIA 80-1200mm(forged round bar), 80-1200mm(square bar) Length 3-16 meters
2,Heat treatment: Quenching,Annealing,Normalizing and Tempering.
3,Tolerance: 0-+3mm(DIA), 0-+10mm(Length)
The grade 20Mn’s properties are similar with 15Mn. 20Mn has higher strength. plastic,machinability. 20Mn has good toughness after hot rolling or normalizing treatment.

The material 20Mn is widely used for gear, crankshaft, bracket, a chain, screw, nut, welding structure, manufacturing oil tank, etc. Our company, BEBON international can produce all sizes of 20Mn forged steel round bar, 20Mn forged square bar, 20Mn forged shafts and 20Mn forged blocks.