St35 Tubo de acero sin costura para amortiguadores / tubo de cilindro

Especificación: 6-68MM Código del HS: 7304391000 Técnica: Tratamiento de la superficie del drenado en frío: Sección engrasada Forma: Acero redondo Grado: Grueso del acero inoxidable, 10 # 20 # 45 # 16mn 25mn 27simn Marca de fábrica: HTSP Origen: China Propiedades químicas / mecánicas

Material	C	Si	Mn	S(≤)	P(≤)	Cr	Ni	Mo
20#	0.17-0.23	0.17-0.37	0.35-0.65	0.035	0.035	≤0.25	≤0.30
45#	0.42-0.50	0.17-0.37	0.50-0.80	0.035	0.035	≤0.25	≤0.30
Q345B	≤0.20	≤0.55	1.00-1.60	0.04	0.04	V:0.02-0.15	Nb:0.015-0.06	Ti:0.02-0.20
16Mn	≤0.20	≤0.55	1.00-1.60	0.045	0.045	V:0.02-0.15	Nb:0.015-0.06	Ti:0.02-0.20
25Mn	0.22-0.30	0.17-0.37	0.70-1.00	0.035	0.035	≤0.25	≤0.25
27SiMn	0.24-0.32	1.10-1.40	1.10-1.40	0.03	0.03

Final Supply Condition	Cold finished(Hard)(BK)		Cold drawn and stress-relieved (BK+S)			Hardness HB
Parameters	T.S	Elongation	T.S	Y.S	δ5%
	obN/mm2	δ5%	obN/mm2	OsN/mm2
20#	>=550	>=8	>=520	>=470	>=12	175
45#	>=650	>=5	>=600	>=520	>=12	207
16Mn	>=640	>=5	>=600	>=520	>=15	190
25Mn	>=640	>=5	>=600	>=510	>=15	195
27SiMn	>=840	>=5	>=800	>=720	>=10	230

Tolerancia de dimensiones

Processing ways	Diameter	Length	Straightness	Degree of precision	Inner hole roughness
Cold rolled	30-100	≤12M	0.3-1.0	H8-H10	0.4-1.6
Cold drawn	30-250	≤12M		H8-H10	0.8-1.6
Honed	40-500	≤12M	1000	H8-H9	0.4-0.8
SRB	40-400	≤7M		H8	0.4

Inner diameter	Inner diameter tolerance		Wall thickness tolerance
	H8	H9
30	0.033	0.052	±5%
>30-50	0.039	0.062
>50-80	0.046	0.074
>80-120	0.054	0.087
>120-180	0.063	0.1
>180-250	0.072	0.115
>250-315	0.081	0.13
>315-400	0.089	0.14

Solicitud

Grupos de Producto : Tubos de acero de precisión > Tubo de acero del automóvil