30CND8 30NCD8 SNCM 431 SNCM431 Forged Forging Steel Round Bars Hollow Bars Rods Gear Pinion Shafts Square rectangular rectangle Blocks Discs Disks Plates Flat Hex Bars
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We are professional 30CND8 30NCD8 SNCM 431 SNCM431 Forged Forging Steel Round Bars Hollow Bars Rods Gear Pinion Shafts Square rectangular rectangle Blocks Discs Disks Plates Flat Hex Bars from china
Chemical composition % of steel 30CND8 30NCD8 SNCM 431 SNCM431 | C | Si | Mn | Ni | P | S | Cr | Mo |
| 0.26 - 0.34 | max 0.4 | 0.5 - 0.8 | 1.8 - 2.2 | max 0.025 | max 0.035 | 1.8 - 2.2 | 0.3 - 0.5 |
Mechanical properties of 30CND8 30NCD8 SNCM 431 SNCM431
| Nominal diameter (mm): | to 16 | 16 - 40 | 40 - 100 | 100 - 160 | 160 - 250 | 250 - 330 | 330 - 660 |
|
| Rm - Tensile strength (MPa) (+QT) | 1250-1450 | 1250-1450 | 1000-1300 | 1000-1200 | 850-1100 | 850 | 800 |
| Nominal diameter(mm): or for flat products thickness: to 8; 8-20; 20-60; 60-100; 100-160; | to 16 | 16 - 40 | 40 - 100 | 100 - 160 | 160 - 250 |
|
Re - Upper yield strength or
Rp0.2 - 0.2% proof strength (MPa) (+QT) | 1050 | 1050 | 900 | 800 | 700 |
| Nominal thickness(mm): | to 160 | 160 - 330 | 330 - 660 |
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| Re - Upper yield strength (MPa) (+QT) | 700 | 630 | 590 |
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| KV - Impact energy (J) longitud., (+QT) | +20°
30-45 |
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| KV - Impact energy (J) transverse, (+QT) | +20°
20-27 |
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| A - Min. elongation at fracture (%) transverse, (+QT) | 8-14 |
| Nominal thickness (mm): | to 16 | 16 - 40 | 40 - 100 | 100 - 160 | 160 - 250 |
|
| A - Min. elongation Lo = 5,65 √ So (%) (+QT), round products | 9 | 9 | 10 | 11 | 12 |
| Nominal diameter (mm): or for flat products thickness: to 8; 8-20; 20-60; 60-100; 100-160; | to 16 | 16 - 40 | 40 - 100 | 100 - 160 | 160 - 250 |
|
| Z - Reduction in cross section on fracture (%) (+QT) | 40 | 40 | 45 | 50 | 50 |
| Brinell hardness (HBW): (+A) | 248 - 255 |
