Seamless Steel Pipe for Motorcycle Shock Absorbers 1045# S45c

• Customization: Available
• After-sales Service: Free
• Warranty: 1 Year
• Model NO.: OD18-38
• Technique: Cold Drawn
• Material: Carbon Steel
• Surface Treatment: Oiled
• Usage: Hydraulic/Automobile Pipe, Machinery Industry, Special Purpose
• Section Shape: Round
• IATF16949: Yes
• Od: 18-38mm
• Thickness: 2-4mm
• Condition: Bright
• Customized: Yes
• Transport Package: Bund
• Trademark: bluesky pipe
• Origin: China
• HS Code: 7304319000
• Production Capacity: 50000 Ton/Year

Product Description

   

Product Description

    The process of manufacturing shock absorbers usually starts with selecting high-quality raw materials. The type of raw materials used can significantly affect the performance and lifespan of shock absorbers. Carbon steel seamless steel pipes and alloy seamless steel pipes are commonly used in the production of shock absorbers.These raw materials will undergo a series of processing steps. At these stages, accuracy is crucial to ensure that each component meets the precise specifications required to achieve optimal performance.

 

Serial Number	Inspection items	sampling quantity
1	chemical composition	Take one sample from each furnace number
2	tensile strength	Take one sample from each batch of two steel pipes
3	hardness	Take one sample from each batch of two steel pipes
4	Non metallic inclusions	Take one sample from each batch of two steel pipes
5	flatten	Take one sample from each batch of two steel pipes
6	flaring	Take one sample from each batch of two steel pipes
7	eddy current testing	Test one by one
8	Internal and external surface roughness	Take one sample from each batch of two steel pipes

 

GRADE	chemical composition%
	C	Si	Mn	Cr	Ni	Mo	Gu	P	S
20#	0.17~0.23	0.17~0.37	0.35~0.65	≤0.25	≤0.30	----	≤0.20	≤0.035	≤0.035
45#	0.42~0.50	0.17~0.37	0.50~0.80	≤0.25	≤0.30	----	≤0.20	≤0.035	≤0.035
40Cr	0.37~0.44	0.17~0.37	0.50~0.80	0.80~1.10	≤0.30	≤0.1	≤0.20	≤0.030	≤0.030
40Mn2	0.37~0.44	0.17~0.37	1.40~1.80	≤0.30	≤0.30	≤0.1	≤0.20	≤0.030	≤0.030
37Mn	0.30~0.39	0.15~0.30	1.20~1.50	≤0.35	≤0.30	≤0.1	≤0.20	≤0.020	≤0.015

 

GRADE	CONDITION
	+C		+LC		+SR			+A		+N			HRC
	Rm	A%	Rm	A%	Rm	Rel	A%	Rm	A%	Rm	Rel	A%
	≤
20#	550	5	520	8	520	375	12	390	21	410	245	25	----
45#	645	8	----	----	----	----	----	590	14	600	355	16	----
40Cr	780	10	----	----	----	----	----	----	----	----	----	----	22~30
40Mn2	780	10	----	----	----	----	----	----	----	----	----	----	22~30
37Mn5	780	12	----	----	----	----	----	----	----	----	----	----	20~27

OD * ID	Allowable deviation of outer diameter	Allowable deviation of inner diameter
18*16       22*20     22.5*20  24*21  39.5*36	0/+0.1	0/+0.039
24*20       24*22     30*28   32*30
26.2*18    27.2*18   28.2*22.7	±0.05	±0.05
30.2*25    31.2*24		±0.1
27.2*19    30.2*24   33.2*24   33.2*28   35.2*28   35.2*31    37.2*32     37.3*33		-0.15/-0.05
37.5*32     41.5*37		+0.05/+0.15
26.2*19     26.2*20   30.2*26   32.2*24     37.2*31   41.2*35.8		-0.25/-0.05
30.35*24     37.35*31	-0.1/0

Equivalent Material referance:
GB	TOCT	ASTM	BS	JIS	NF	DIN
20	20	1020	050A20	S20C	XC18	C22,CK22
45	45	1045	080M46	S45C	XC45	C45,CK45
40Cr		5140	41Cr4	SCR440	41Cr4/38Cr4	41Cr4/42Cr4
40Mn2		1340		SMn438		42Mn6
37Mn5

Processing	Cold rolled/ Cold drawn
	1. BK (+C)  No heat treatment after last cold forming process.
	2. BKW (+LC) After last heat treatment there is a light finishing pass ( cold drawing)
	3. BKS (+SR) After the final cold forming process the tubes are stress relieve annealed.
	4. GBK (+A) After the final cold forming process the tubes are annealed in a controlled  atmosphere.
	5. NBK (+N) After the final cold forming process the tubes are annealed above the  upper transformation point in a controlled atmosphere.
Packing	Woven bag/ Wooden or crate carton/ Bundle Packing/ Plain end or vanished as per  customer's request.
Delivery time	Normally 30-40 working days

Actual testing