JIS Standard STKM11A automobile parts using CK45 cold drawn tubing
Grade:20# 45# Q345B Q345D 25Mn 27SiMn E355 SAE1026
Standard:GB/T8713 GB/T3639 DIN2391 EN10305 ASTMA519
Grade | chemical composition% | ||||
C | Si | Mn | P | S | |
20# | 0.17-0.24 | 0.17-0.37 | 0.35-0.65 | 0.035 | 0.035 |
45# | 0.42-0.50 | 0.17-0.37 | 0.50-0.80 | 0.035 | 0.035 |
SKTM13C-T(25Mn) | 0.22-0.29 | 0.17-0.37 | 0.70-1.00 | 0.035 | 0.035 |
27SiMn | 0.24-0.32 | 1.10-1.40 | 1.10-1.40 | 0.035 | 0.035 |
E355 | ≤0.22 | ≤0.55 | ≤1.6 | 0.025 | 0.025 |
Q345B | ≤0.2 | ≤0.5 | 1.00-1.60 | 0.030 | 0.030 |
Q345D | ≤0.2 | ≤0.5 | 1.00-1.60 | 0.030 | 0.030 |
SAE1026 | 0.22-0.28 | 0.15-0.35 | 0.60-0.90 | 0.040 | 0.050 |
OD tolerance
ID tolerance:
ID size | ID deviation (mm) | |||
H7 | H8 | H9 | H10 | |
30 | +0.021 0 | +0.033 0 | +0.052 0 | +0.084 0 |
>30~50 | +0.025 0 | +0.039 0 | +0.062 0 | +0.100 0 |
>50~80 | +0.030 0 | +0.046 0 | +0.074 0 | +0.120 0 |
>80~120 | +0.035 0 | +0.054 0 | +0.087 0 | +0.140 0 |
>120~180 | +0.040 0
| +0.063 0 | +0.100 0 | +0.160 0 |
>180~250 | +0.046 0 | +0.072 0 | +0.115 0 | +0.185 0 |
>250~315 | +0.052 0 | +0.081 0 | +0.130 0 | +0.210 0 |
>315~400 | +0.0527 0 | +0.089 0 | +0.140 0 | +0.230 0 |
mechanical property
Delivery condition | BKS Cold Drawn & Stress-Relieved | ||
Steel Grade | Rm MPa | ReH MPa | Elongation A5(%) |
ST45 | ≥520 | ≥375 | ≥15 |
ST52(E355) | ≥600 | ≥520 | ≥14 |
SAE1026 | ≥600 | ≥510 | ≥15 |
45# | ≥600 | ≥520 | ≥10 |
20# | ≥520 | ≥375 | ≥15 |
YanTai XinPeng Steel Pipe Co.,Ltd located in Yantai, a beautiful coastal city in Jiaodong Peninsula, our company is in the (APEC) Science & Technology Industrial Park, urban area of Yantai, with convenient transportation. Established in December 1992, with registered capital of 5 million yuan . Our company mainly produces various specifications of cold drawn,rolled precision steel tube,hydraulic cylinder tube and SRB Tube, which are widely used in such industries as hydro-cylinder, automobile, engineering machinery, textile machinery, printing machinery, oil drilling, etc. Our company is also the distributor of several domestic well-known steel tube plants in Shandong, and mainly distributes seamless steel tubes of all kinds of materials.
1) Fuel injection lines/nozzles for diesel or gasoline engine;
2) Compressed natured gas CNG tube
3) Drive transmission: steering column elements
4) Gear shafts, hand brake, front axles, airbag inflators, stabilizers, seat fasteners, front-wheel
drive shafts
5) Mechanical structure pipe parts in automobile,motorcycles and vehicle
6) Hydraulic circuits, pneumatic lines and hydraulic suspension
7) Hydraulic cylinders
1.portable hardness tester
2.wall thickness gauge
3.ultrasonic flaw detector
4.digital rockwall hardness tester
5.tensile testing machine
6.USA import UT test machine
1.Are you a trading company or manufacturer?
We are the professional manufacturer of precision seamless steel pipe since the year 1992.
2. How can I get the price?
We usually quote within 24 hours after we get your inquiry by telling us the material, out diameter,
wall thickness length, quantity and application of the steel pipe which you need.
If you are very urgent to get the price.
please inform us in email so that we will regard your inquiry priority.
3. How can I get a sample to check your quality?
After price confirmation, you can require for samples to check our quality. we will provide you
the sample for free, however we could only make sure the same material, the dimension will be
much similar as your request but not same.
And customer should afford the charge of shipment.
4. What about the lead time for mass production?
Honestly, it depends on the order quantity and the season you place the order.
if normal order 25-30days.
5. What is your terms of delivery?
We accept FOB CIF EXW CFR.