ASTM a53 gr.b cold rolled seamless steel pipe
Mechanical property
Material | Tensile strength | Yield strength | Elongation | Hardness |
Ck20/20#/AISI1020 | >520 N/ mm2 | >375 N/mm2 | >15% | >85HB |
Ck45/45#/AISI1045 | >600 N/ mm2 | >520 N/ mm2 | >15% | >85HB |
ST52/16Mn/Q345D | >600 N/ mm2 | >520 N/ mm2 | >15% | >85HB |
25Mn/STKM 13C-T | >600 N/ mm2 | >530 N/ mm2 | >15% | >85HB |
precision bright tube grde and chemical composition
chemical composition(%) | |||||
grade | C | Si | Mn | P | S |
St35 | ≤0.18 | 0.17-0.37 | 0.35-0.65 | 0.035 | 0.035 |
St37.4(10#) | ≤0.18 | 0.17-0.37 | 0.35-0.65 | 0.035 | 0.035 |
St45(20#) | ≤0.25 | 0.17-0.37 | 0.50-0.80 | 0.035 | 0.035 |
St55(35#) | ≤0.22 | ≤0.55 | ≤1.50 | 0.035 | 0.035 |
St52(16Mn) | ≤0.20 | ≤0.55 | ≤1.50 | 0.035 | 0.035 |
CK45 | 0.42-0.50 | 0.17-0.37 | 0.50-0.80 | 0.035 | 0.035 |
precision steel tube technique and tolerance
Working method | Range | ID size | Tolerance | ||||||
ID Tolerance | WT | Ovality | Curvature | ||||||
H8 | H9 | H10 | |||||||
cold drawn | 25-250 | >30-50 | +0.039 0 | +0.062 0 | +0.100 0 |
±5% to 7.5% ID>210mm ±10% |
≤0.10-0.20 |
0.3 | |
cold rolling | 25-150 | >50-80 | +0.046 0 | +0.074 0 | +0.120 0 | ||||
cold-drawn-honed | 40-250 | >80-120 | +0.054 0 | +0.087 0 | +0.10 0 | ||||
cold drawn-SRB | 50-250 | >120-180 | +0.063 0 | +0.100 0 | +0.160 | ||||
cold drawn-polish | 40-250 | >180-250 | +0.072 0 | +0.115 0 | +0.185 0 | ||||
polish-SRB | 50-250 | other size and technique parameter upon request | |||||||
Honed tube features
1, improved the surface roughness, roughness can be basically Ra ≤ 0.08 micro.
2, correction roundness, oval can be ≤ 0.01mm.
3. improved the surface hardness, so that the deformation of the force to eliminate, improve the hardness HV ≥ 4 °
4, after processing residual stress layer, improve fatigue strength increased by 30%.
5, improved with the quality, reduce wear and tear to extend the life of parts, but the parts of the processing costs instead.
The difference between honed pipe and seamless steel pipe
1, the main feature of seamless steel pipe is welded joints, can withstand greater pressure. The product can be very rough as cast or cold parts.
2,honed tube is the product in recent years, mainly the hole, the outer wall size has strict tolerances and roughness.
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.Short delivery time:
Within45 days below 100Metric Tonsafter sightof Irrevocable L/C or receipt Deposit.
2.Quality assurance:
Strictly according to Internationalstandard like ASTM API DIN JIS.
3.Competitive price:
Provide our best price to reach our cooperation
4.Superior Service:
We will try our best to satisfy your per request.
We prepare to provide the pre-sales serves, service during sales and afer-sales service for coustomes by the way ofadvance service, value added service and personalized service.
5.Our advantage:
1)professional & skilled & reliable
2)One step total solution
3)Ready stock goods with fast delivery
4)Customizable:Non-standard sizes are also available
5)small quantity is acceptable
6)refund or replacement for any product faulty
packaging details:
1.bundle with steel strips
2.brand parcel
3.wooden box
4.as clinets request
delivery details: 15days after payment
1.100% quality satisfaction guarantee following with ISO9001 verified
2. professional package which can assure long distance sea transportation
3. delivery in time
4. more than 20 years experience specializing in steel trading line
5.alibaba trade assurance supplier