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4130 CrMo Alloy Small Diameter seamless steel tube for Bicycle forks

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4130 CrMo Alloy Small Diameter seamless steel tube for Bicycle forks

Name: 4130 CrMo Alloy Small Diameter seamless steel tube for Bicycle forks
Brand: Joyruns
Price: 1 USD

4130 CrMo Alloy Small Diameter seamless steel tube for Bicycle forks Manufactures

Brand Name : Joyruns

Model Number : EN10305-1, DIN2391

Certification : ISO9000

Place of Origin : CHANGZHOU, CHINA

MOQ : 5TONs

Price : Negotiable

Payment Terms : TT OT 100% LC AT SIGHT

Supply Ability : 1000Ton/month

Delivery Time : 30DAYS

Packaging Details : Exporting package/wooden box package

Standard : EN10305-1, DIN2391

Grade : E235, E255, E355

Type : Seamless cold drawing or cold rolled

OD. Range : 3mm – 30mm

Thickness : 0.5mm--12

Length : Max length 6m

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4130 Alloy Chromoly Steel Pipe

Chemical Composition(%)									Mechanical Property
C	Si	Mn	S	P	Cr	Ni	Cu	Mo	Yield Strength	Tensile Strength
									( σs )	( σb )
0.28~0.33	0.15~0.30	0.40~0.60	≤0.04	≤0.035	≤0.15	0.80~1.10	/	0.15~0.25	≥785(80) (MPa)	≥930(95)
										(MPa)
End Shape	Beveled end, plain end, vanished, or adding plastic caps to protect the two ends as per customer's requirements
Surface	Oiled, Galvanized, Phosphate etc
Treatment
Technique	Cold drawn
Application	1. Automotive and mechanical pipes
	2. Petroleum cracking pipes
	3. High Pressure Boiler Pipe
	4. Low and middle pressure fluid transportation pipeline
	5. Chemical fertilizer equipment pipes
	6. Heat exchanger pipes
Delivery	1. BK (+C)	No heat treatment after last cold forming process.
Conditions	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 acontrolled atmosphere.
Package	1. Bundle Packing.
	2. Plain end or vanished as per customer's request.
	3. Wrapped in waterproof paper.
	4. Sackcloth with several steel strips.
	5. Pack in heavy tri-wall boxes

Quality Control:
1. Incoming Raw Material Inspection
2. Raw Material Segregation to avoid steel grade mix-up
3. Heating and Hammering End for Cold Drawing
4. Cold Drawing or Cold Rolling, Online inspection
5. Heat Treatment:+SR, +A, +N
6. Straightening/Cutting to specified length/Finished Measuring Inspection
7. Quality Testing in own lab with Tensile Strength, Yield Strength, Elongation, Hardness, Straightness, etc.
8. Packing and Stocking.

100% Eddy Current Testing.
100% Size Tolerance Checking.
100% Tube surface checking to avoid surface defects.

Customer benefits

High dimensional accuracy for inside and outside diameters
Extremely limited wall thickness tolerances
Reduced eccentricity
Smooth drawn surface
Increased strength values due to cold forming
Tightly staggering range of dimensions
Customized heat treatment

4130 CrMo Alloy Small Diameter seamless steel tube for Bicycle forks

4130 CrMo Alloy Small Diameter seamless steel tube for Bicycle forks Images

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