SAE 5140 40cr SCR440 Steel Round Bar for 8.8 Grade Bolt
Wuxi Taixie Metal Material Co., Ltd.- Technique：Hot Rolled
- Composition：Ferrous Steel Scrap
- Standard：AISI, ASTM, DIN, JIS, GB, BS
- Type：Alloy Steel Bar
- Shape：Bar
- Surface Treatment：Polished
Base Info
- Transport Package：Woven Bag, Wooden Box
- OEM：Yes
- Delivery Time：5~10 Working Days
- Yield Strength：225
- Certificate：ISO SGS
- Poisson′s Ratio：0.25~0.33
- Strength：375-500
- Elongation：25
- Application：Tool Steel Bar
- Special Use：High-strength Steel Plate, Wear Resistant Steel, Silicon Steel, Cold Heading Steel, Free Cutting Steel, Mold Steel
- Model NO.：5140
- Specification：ISO SGS
- Trademark：Taixie
- Origin：Wuxi, Jiangsu
- HS Code：7507120000
- Production Capacity：10000tons,Y
Description
Sizes detailsdiameter 16-300mm length 1-12m(canbe customerized) Sizes tolerance length -0/+50mm Straightness 3mm/m(max)
2.40cr sae 5140 for 8.8 grade fasteners--equal grades
3.Chemical composition
4.Mechanical property
5.Quality control
1.Processing Line:
Iron - hot metal pretreatment - Converter - Refining --VD / RH- - Continuous Casting - Hot Rolling (KOCKS) - heat --UT Check - Processing and Distribution Center
Electric Furnace - Refining --VD / RH- - Continuous Casting - Hot Rolling (KOCKS) - heat --UT Check - Processing and Distribution Center
2.Gas content level:O2 - <20 ppm H2 - <2 ppm N2- <100 ppm
3.Grain Sizes:5-8
4. non-metallic inclusions contorlling level
2.40cr sae 5140 for 8.8 grade fasteners--equal grades
| GB | ASTM | JIS | DIN | BS | NF |
| 40Cr | 5140 | SCr440 | 41Cr4(1.7035) | 530A40 | 42C4 |
3.Chemical composition
| C | Si | Mn | Cr | Ni(≤) | Cu(≤) | P(≤) | S(≤) |
| 0.37-0.44 | 0.17-0.37 | 0.5-0.8 | 0.8-1.0 | 0.3 | 0.03 | 0.035 | 0.035 |
4.Mechanical property
| Tensile strength | Yild strength | Elongation | reduction of area |
| Min (%) | Min (%) | Min (%) | Min (%) |
| Mpa | Mpa | Mpa | Mpa |
| 980 | 785 | 9 | 45 |
5.Quality control
1.Processing Line:
Iron - hot metal pretreatment - Converter - Refining --VD / RH- - Continuous Casting - Hot Rolling (KOCKS) - heat --UT Check - Processing and Distribution Center
Electric Furnace - Refining --VD / RH- - Continuous Casting - Hot Rolling (KOCKS) - heat --UT Check - Processing and Distribution Center
2.Gas content level:O2 - <20 ppm H2 - <2 ppm N2- <100 ppm
3.Grain Sizes:5-8
4. non-metallic inclusions contorlling level
| A | B | C | D | |
| MAX | MAX | MAX | MAX | |
| Thin | 2 | 2 | 2 | 2 |
| Thick | 1 | 1 | 1 | 1 |