1. Thành phần hóa học
| Nguyên tố | Phần trăm khối lượng % |
|---|---|
| C | 0.38–0.43 |
| Mn | 1.35–1.60 |
| P | ≤ 0.020 |
| S | ≤ 0.020 |
| Si | 0.15–0.30 (SiFg/SiCg); CgP: confirm practice |
2. Cơ tính
| Trạng thái giao hàng | Rm ≤ / ksi | R/A ≥ / % |
|---|---|---|
| Rod/bar: annealed | 93 | 53 |
| Rod/bar: spheroidize annealed | 86 | 57 |
| Wire: SAFS | 83 | 61 |
| Wire: AIP | 99 | 51 |
| Wire: SAIP | 93 | 55 |
3. Điều khoản nguồn và phạm vi áp dụng
Dữ liệu tham chiếu: ASTM F2282-23. Trạng thái giao hàng và yêu cầu nghiệm thu được xác định trong đặc tính kỹ thuật của đơn hàng.
ASTM F2282-23 Table 4 names the permitted steelmaking practices; Table 6 gives Si 0.15–0.30% for the Si-killed fine/coarse-grain practices of these grades. IFI-1541/B also lists CgP; the order must identify the actual deoxidation practice before a Si limit is applied to that option.
ASTM F2282-23 Table 4 steelmaking practices for this grade: SiFg / SiCg / CgP. SiFg = silicon-killed fine grain; SiCg = silicon-killed coarse grain; CgP = coarse-grain practice. These are not equivalence claims.
ASTM F2282-23 Table 11: maximum tensile strength in ksi and minimum reduction of area (R/A) in percent. Material condition and product form determine the applicable column.
Table 11 footnote A: for aluminium-killed steel subtract 3 ksi and add 1 percentage point R/A; for rimmed steel subtract 5 ksi and add 2 percentage points R/A.
For AIP and SAIP wire below 0.200 in., Table 11 footnote A adds 50 psi for every 0.001 in. below 0.200 in.; apply only to those two columns.
Table 11 Note 1: R/A testing does not apply to wire below 0.092 in. These tabulated limits are not a mill certificate or order-specific acceptance decision.
ASTM F2282-23 section 6.5 also requires the residual-element limits in Table 9. Table 4 does not repeat those limits in each grade row; this page is not a substitute for the complete ordered specification.
ASTM reference: F2282-23 · Tables 4, 6, 10 and 11. Historical page identity: IFI-1541/B.
ASTM F2282-23 Table 10 · Decarburization · inches
| Diameter d / in. | Free ferrite depth ≤ / in. | TAAD ≤ / in. | Worst-location depth ≤ / in. |
|---|---|---|---|
| d ≤ 25/64 | 0.001 | 0.005 | 0.008 |
| 25/64 < d ≤ 5/8 | 0.001 | 0.006 | 0.009 |
| 5/8 < d ≤ 55/64 | 0.001 | 0.007 | 0.011 |
| 55/64 < d ≤ 1 | 0.001 | 0.008 | 0.012 |
| 1 < d ≤ 1½ | 0.001 | 0.010 | 0.015 |
Table 10 applies to killed steels with carbon content exceeding 0.15%. Confirm the ordered product form and applicable acceptance method; the page is not a mill certificate.