前面是外径，*后面是壁厚
如6 8 10 12 14 16 18 *1--3
表示可选择外径6毫米或8毫米或10毫米等，最大可到18毫米
而1--3表示可选壁厚1毫米到3毫米之间
尺寸公差对照表
|
尺寸公差对照表 |
|
外径尺寸范围 |
GB/T3639(GB8713) |
DIN2391(EN10305) |
本公司正常范围 |
特殊范围 |
|
4mm-30mm |
±0.10mm |
±0.08mm |
±0.05mm |
±0.02mm |
|
31mm-40mm |
±0.15mm |
±0.15mm |
±0.05mm |
±0.03mm |
|
41mm-50mm |
±0.20mm |
±0.20mm |
±0.05mm |
±0.03mm |
|
51mm-60mm |
±0.25mm |
±0.25mm |
±0.08mm |
±0.03mm |
|
61mm-70mm |
±0.30mm |
±0.30mm |
±0.10mm |
±0.05mm |
|
71mm-160mm |
±0.30mm |
±0.30mm |
±0.10mm |
±0.05mm |
|
壁厚公差范围 |
±0.12mm |
±0.10mm |
±0.05mm |
±0.03mm |
小口径精密钢管常用规格|小口径精密钢管允许尺寸偏差
10# 0.07~0.13 0.17~0.37 0.35~0.65 ≤0.035 ≤0.035
20# 0.17~0.23 0.17~0.37 0.35~0.65 ≤0.035 ≤0.035
35# 0.32~0.39 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
40cr 0.37~0.44 0.17~0.37 0.50~0.80 ≤0.035 ≤0.035 0.08~1.10
25Mn 0.22~0.2 0.17~0.37 0.70~1.00 ≤0.035 ≤0.035 ≤0.25
37Mn5 0.30~0.39 0.15~0.30 1.20~1.50 ≤0.015 ≤0.020
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