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.
Product Parameters & Inspection
Serial Number
Inspection items
Sampling quantity
1
Chemical composition
One sample from each furnace number
2
Tensile strength
One sample from each batch of two steel pipes
3
Hardness
One sample from each batch of two steel pipes
4
Non metallic inclusions
One sample from each batch of two steel pipes
5
Flattening
One sample from each batch of two steel pipes
6
Flaring
One sample from each batch of two steel pipes
7
Eddy current testing
Test one by one
8
Surface roughness
One sample from each batch of two steel pipes
GRADE
Chemical Composition %
C
Si
Mn
Cr
Ni
Mo
Cu
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
Actual testing:
Professional Manufacturing Facilities
Frequently Asked Questions
Are you a trading company or a manufacturer?
We are a professional manufacturer of steel pipes. We have extensive export experience with competitive pricing and excellent after-sales service, providing a wide range of steel products to meet diverse customer requirements.
Will you deliver the goods on time?
Yes, we promise to provide the best quality products and ensure timely delivery regardless of market price fluctuations. Honesty is our company's core tenet.
Do you provide samples? Is it free or extra?
Samples can be provided to customers free of charge; however, the freight cost is covered by the customer. The sample freight will be credited back to the customer's account once a formal cooperation begins.
How can I get your quotation as soon as possible?
Our team checks communications within 24 hours. Please send your specific requirements including steel grade, size, quantity, and destination port, and we will work out the best price for you promptly.
Do you have any certifications?
Yes, we hold ISO9000, IATF16949, and ISO 14001 certificates. Our products are of high quality, supported by a professional engineering and development team.
What are your terms of payment?
For orders over 1000USD, we typically accept 30% T/T in advance with the balance due before shipment or against the B/L copy. 100% Irrevocable L/C at sight is also a favorable payment term.
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