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| ƫ��ȼ� | �����⾶����ƫ�� |
| D1 | ±1.5%����С±0.75 mm |
| D2 | ±1.0%����С±0.50 mm |
| D3 | ±0.75%����С±0.30 mm |
| D4 | ±0.50%����С±0.10 mm |
20G��ѹ��¯����ѧ���ܣ�
����| �� | �ƺ� | ����ǿ�ȣ�MPa�� | ����ǿ�ȣ�MPa�� | �쳤�ʣ����� | Ӳ�� |
| GB3087 | 10 | 335��475 | ≥195 | ≥24 | / |
| 20 | 410��550 | ≥245 | ≥20 | / | |
| GB5310 | 20G | 410��550 | ≥245 | ≥24 | / |
| 20MnG | ≥415 | ≥240 | ≥22 | / | |
| 25MnG | ≥485 | ≥275 | ≥20 | / | |
| 15CrMoG | 440��640 | ≥235 | ≥21 | / | |
| 12Cr2MoG | 450��600 | ≥280 | ≥20 | / | |
| 12Cr1MoVG | 470��640 | ≥255 | ≥21 | / | |
| 12Cr2MoWVTiB | 540��735 | ≥345 | ≥18 | / | |
| 10Cr9Mo1VNb | ≥585 | ≥415 | ≥20 | / | |
| ASME SA210 | SA210A-1 | ≥415 | ≥255 | ≥30 | ≤143HB |
| SA210C | ≥485 | ≥275 | ≥30 | ≤179HB | |
| ASME SA213 | SA213 T11 | ≥415 | ≥205 | ≥30 | ≤163HB |
| SA213 T12 | ≥415 | ≥220 | ≥30 | ≤163HB | |
| SA213 T22 | ≥415 | ≥205 | ≥30 | ≤163HB | |
| SA213 T23 | ≥510 | ≥400 | ≥20 | ≤220HB | |
| SA213 T91 | ≥585 | ≥415 | ≥20 | ≤250HB | |
| SA213 T92 | ≥620 | ≥440 | ≥20 | ≤250HB | |
| DIN17175 | ST45.8/�� | 410��530 | ≥255 | ≥21 | / |
| 15Mo3 | 450��600 | ≥270 | ≥22 | / | |
| 13CrMo44 | 440��590 | ≥290 | ≥22 | / | |
| 10CrMo910 | 480��630 | ≥280 |