Customization: | Available |
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After-sales Service: | 1 Year |
Warranty: | 1 Year |
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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.
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 |
Material | 10#-45#, 16Mn, A53-A369, Cr-Mo alloy, Q195-Q345, ST35-ST52, 10#, 20#, 45#, 16Mn, A213, A315, 30CrMo, Q195, Q215, Q235, Q345, ST35, St37, St45, St52 |
Surface | Black/ Bright |
Standard | DIN, GB, JIS, DIN 17175, DIN 2391, GB 5310-1995, GB/T 13793-1992, GB/T 3094- 2000, GB/T3639, JIS G3101 |
Size | OD 15mm-75mm |
Thickness 1-14mm | |
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 20-30 working days |
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