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| 1. Specifications |
| Category | Grade | Specification（mm） | Production standards |
| High quality carbon steel | 20～45, SAE1045, S45C, C45, C45E, CK45 and etc. |
Φ300, Φ380, Φ400, Φ450, Φ500, Φ600 rectangle 200×380, 200×400 |
GB, ASTM, JIS, DIN or customer specified requirements |
| Low alloy steel | Q345A (B, C, D, E) |
Φ300, Φ380, Φ400, Φ450, Φ500, Φ600 rectangle 200×380, 200×400 |
GB, ASTM, JIS, DIN or customer specified requirements |
| Alloy steel | 42CrMoA, 40Cr, SCM440, 4140, 42CrMo4 and etc. |
Φ300, Φ380, Φ400, Φ450, Φ500, Φ600 rectangle 200×380, 200×400 |
GB, ASTM, JIS, DIN or customer specified requirements |
| Pipeline steel | 37Mn5, L290, 29Mn2, 12Cr1MoVG, P91, P92 and etc. |
Φ300, Φ380, Φ400, Φ450, Φ500, Φ600 |
GB or customer specified requirements |
| Alloy tool steel | 5CrMnMo， 5CrNiMo 4Cr5MoSiV1 and etc. |
Φ300, Φ380, Φ400, Φ450, Φ500, Φ600 rectangle 200×380, 200×400 |
GB or customer specified requirements |
| Railway steel | U71Mn, 900A and etc. |
rectangle 200×380, 200×400 |
TB/T2344-2012 or customer specified requirements |
| 2. Product Quality Level |
| Category | Grade | Chemical component | Non-metallic Inclusion | Harden ability HRC |
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P ≤ (%) |
S ≤ (%) |
[O] ≤ (ppm) |
A thin ≤ |
A heavy ≤ |
B thin ≤ |
B heavy ≤ |
C thin ≤ |
C heavy ≤ |
D thin ≤ |
D heavy ≤ |
Ds ≤ |
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| Carbon steel | SAE1045, S45C, CK45, 45 |
0.015 | 0.005 | 20 | 1.5 | 1.0 | 1.5 | 1.0 | 0 | 0 | 1.5 | 1.0 |
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| Alloy steel | 42CrMo, 40Cr |
0.015 | 0.005 | 20 | 1.5 | 1.0 | 1.5 | 1.0 | 0 | 0 | 1.5 | 1.0 | 1.5 |
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| Pipeline steel | 37Mn5, L290, 29Mn2, 12Cr1MoVg | 0.015 | 0.005 | 20 | 1.5 | 1.0 | 1.5 | 1.0 | 0 | 0 | 1.5 | 1.0 |
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| Gear steel | 20CrMoH, 20CrMnTiH, 20CrNiMoH | 0.015 | 0.005 | 20 | 1.5 | 1.0 | 1.5 | 1.0 | 0 | 0 | 1.5 | 1.0 |
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≤6 |
| SCM420H, SCM822H | 0.015 | 0.005 | 20 | 1.5 | 1.0 | 1.5 | 1.0 | 0 | 0 | 1.5 | 1.0 |
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≤6 | |
| Spring steel | 60Si2CrVA | 0.015 | 0.005 | 20 | 1.5 | 1.0 | 1.5 | 1.0 | 0 | 0 | 1.5 | 1.0 |
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| Bearing steel | GCr15 | 0.015 | 0.005 | 10 | 1.0 | 0.5 | 1.0 | 0.5 | 0 | 0 | 1.0 | 0.5 | 1.0 | |
