- Model NO.：KM-20200713
- Wt：2.0mm~14mm
- Transport Package：in Bundle or Customer′s Requirement
- Specification：API, ISO, TUV
- Trademark：Kingmetal
- Origin：China
- HS Code：73045110
- Production Capacity：500 Tons Per Month
| Element | Grade 8 |
| Carbon, max | 0.13 |
| Manganese | 0.90 max |
| Phosphorus, max | 0.025 |
| Sulphur, max | 0.025 |
| Silicon | 0.13-0.32 |
| Nickel | 8.40-9.60 |
| Chromium | -- |
| Copper | -- |
| Aluminum | -- |
| Vanadium, max | -- |
| Columbium, max | -- |
| Molybdenum, max | -- |
For each reduction of 0.01% carbon below 0.30%, an increase of 0.05% manganese above 1.06% would be permitted to a maximum of 1.35% manganese.
TENSILE REQUIREMENT
| | Grade 8 |
| | psi | MPa |
| Tensile strength Min | 100 000 | 690 |
| Yield strength Min | 75 000 | 515 |
| | Longitudinal | Transverse |
| Elongation in 2 in or 50 mm (or 4D), min, % | | |
| Basic minimum elongation for walls 5/16 in. [8mm] and over in thickness, strip tests, and for all small sizes tested in full section. | 22 | -- |
| When standard round 2-in, or 50-mm gage length or proportionally smaller size test specimen with the gage length equal to 4D (4 times the diameter) is used | 16 | -- |
| For strip tests, a deduction for each 1/32 in [0.8 mm] decrease in wall thickness below 5/16 in [8 mm] from the basic minimum elongation of the following percentage | 1.25 | -- |
Elongation in 2 in or 50 mm, min, %
| Wall Thickness | Grade 8 |
| in | mm | Longitudinal | Transverse |
| 5/16 (0.312) | 8 | 22 | -- |
| 9/32 (0.281) | 7.2 | 21 | -- |
| 1/4 (0.250) | 6.4 | 20 | -- |
| 7/32 (0.219) | 5.6 | 18 | -- |
| 3/16 (0.188) | 4.8 | 17 | -- |
| 5/32 (0.156) | 4 | 16 | -- |
| 1/8 (0.125) | 3.2 | 15 | -- |
| 3/32 (0.094) | 2.4 | 13 | -- |
| 1/16 (0.062) | 1.6 | 12 | -- |
