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Product Type: | |
Material: | Carbon Round Steel Tube |
Outer Diameter: | 30-250mm |
Wall Thickness: | 3-20mm |
Material Grade: | ST52,E355,CK45,A106,A53,SKTM11A,STKM13A,STKM13C,S45C,and so on |
Delivery Condition: | BK/BKS/GBK/NBK |
Delivery time: | within 20-30 days after receiving prpayment |
Trade Terms: | FOB Yantai, Qingdao or any other China main port |

OD | GB/T3639 | DIN2391 (EN10305) | Our Tolerance | Best Quality | ||||||
31-40mm | ±0.15mm | ±0.15mm | ±0.05mm | ±0.03mm | ||||||
41-50mm | ±0.20mm | ±0.20mm | ±0.05mm | ±0.03mm | ||||||
51-60mm | ±0.25mm | ±0.25mm | ±0.08mm | ±0.03mm | ||||||
61-70mm | ±0.30mm | ±0.30mm | ±0.10mm | ±0.05mm | ||||||
71-160mm | ±0.30mm | ±0.30mm | ±0.10mm | ±0.05mm | ||||||
160mm-230mm | ±0.50mm | ±0.50mm | ±0.40mm | |||||||
Tolerance in WT | ±0.12mm | ±0.10mm | ±0.05mm | ±0.03mm | ||||||
PROCESS | ||||||||||
Process | Diameter | Length | ||||||||
Cold Rolled | 30-100mm | ≤10 m | ||||||||
Cold Draw | 30-250mm | ≤10 m | ||||||||
Honing | 40-500mm | ≤10 m | ||||||||
Skived burnished | 40-400mm | ≤76m | ||||||||
HONED OR SRB TUBE TOLERANCE | ||||||||||
Inner Diameter | H8 | H9 | H10 | |||||||
30mm | ±0.033 | ±0.052 | ±0.084 | 5-30mm | ||||||
30-50mm | ±0.039 | ±0.062 | ±0.100 | ±0.080 | ||||||
50-80mm | ±0.046 | ±0.074 | ±0.120 | |||||||
80-120mm | ±0.054 | ±0.087 | ±0.140 | |||||||
120-180mm | ±0.063 | ±0.100 | ±0.160 | |||||||
180-250mm | ±0.072 | ±0.115 | ±0.185 | |||||||
250-315mm | ±0.081 | ±0.130 | ±0.210 | |||||||
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