Forged Rings for Slewing Rings

We can also provide Forged Rings for Slewing Rings . We can supply the material of C45 steel, 50Mn, 42CrMo material. Normally we deliver the forged rings after rough machining and quenching, and the tolerance can be discussed case by case. 

Chemical Analysis

Steel	C	Si	Mn	P	S	Cr	Mo	Ni	Cu
50Mn	0.48~0.56	0.17~0.37	0.70~1.00	≤0.035	≤0.035	≤0.25	—	≤0.30	≤0.20
42CrMo	0.38~0.45	0.17~0.37	0.50~0.80	≤0.035	≤0.035	0.90~1.20	0.15~0.25	—	—
45	0.42~0.50	0.17~0.37	0.50~0.80	≤0.035	≤0.035	≤0.25	—	≤0.30	≤0.20
* or other materials as required by customers

Mechanical Properties

Steel Grade	Tensile Strength σb	Yield Point σs	Elongation δ5	Shrinkage ψ	Impact Aku2
GB/T 699-1999	≥645MPa	≥390MPa	≥13%	≥40%	≥31J
50Mn
GB/T 699-1999	≥1080MPa	≥930MPa	≥12%	≥45%	≥63J
42CrMo
GB/T 699-1999	≥600MPa	≥355MPa	≥16%	≥40%	≥39J
45

Contrast of Steel Grade

Chinese Standard	DIN Standard	AISI Standard	ISO Standard
GB/T 699-1999	—	AISI1053	SL，SM
50Mn
GB/T 699-1999	42CrMo4	4140	42CrMo4
42CrMo
GB/T 699-1999	C45E	AISI1045	C45E4
45

Heat treatment: Quenching & Tempering, Normalizing

Hardness of forged rings

Steel Grade	Quenching&Tempering	Normalizing
	Hardness	Hardness
GB/T 699-1999	HB229~269	HB179~235
50Mn
GB/T 699-1999	HB269~321	*
42CrMo
GB/T 699-1999	HB228~280	HB170~217
45
* As required by customers

 We determine the hardness according to the diameter of depression in the forged rings.