4Cr9Si2 forged steel round bar

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24-Jun-2024

The material 4Cr9Si2 is a kind of heat-resisting steel bars under the standard GB/T 1221-1992.

4Cr9Si2 is mainly used in the manufacture of boiler, steam turbine, power machinery, industrial furnace and aviation, petrochemical and other industrial department parts working under the high temperature.

forged steel round bar

Characteristic:

4Cr9Si2 has higher thermal work-study, and 4Cr9Si2 is used for internal combustion engine intake valve and light load of engine exhaust valve, etc.

Grade	Chemical composition %:
Grade	C	Si	Mn	S	P	Cr	Ni
4Cr9Si2	0.35-0.50	2.0-3.0	≤0.70	≤0.030	≤0.035	8.0-10.0	≤0.60

4Cr9Si2 mechanical properties:

Grade	mechanical properties:
	Tensile strength σb (Mpa)	Condition yield strength σ0.2 (Mpa)	Elongation δ5/（%）	Percentage reduction of areaψ (%)	Hardness
	(Quenching and tempering) min	(Quenching and tempering) min	(Quenching and tempering) min	(Quenching and tempering) min	Annealing max
4Cr9Si2	885	590	19	50	269HB

Notes:

1. 4Cr9Si2 specification: DIA 80-1200mm(forged round bar), 80-1200mm(square bar) Length 3-16 meters

2. 4Cr9Si2 heat treatment: Quenching,Annealing,Normalizing and Tempering.

3. 4Cr9Si2 tolerance: 0-+3mm(DIA), 0-+10mm(Length)

The equivalent materials for 4Cr9Si2 are SUH1,X45CrSi9,401S45 and Z45CS9.

Our company, KUNFENG Steel can produce all sizes of 4Cr9Si2 forged steel round bar, 4Cr9Si2 forged square bar, 4Cr9Si2 forged shafts and 4Cr9Si2 forged blocks.