EN_US-Product-Cold-rolled-AHSS-All Grades OverviewTSUK
The good formability of our advanced and ultra high-strength steels (AHSS / UHSS) allows the user to increase the strength of the finished automotive components in body in white applications (BIW) by exploiting the high work-hardening characteristics. Substitution of high strength steel grades provides opportunities to reduce thickness while maintaining the in-service performance, resulting in potential cost and mass savings.
Dual phase grades
Cold-rolled dual phase steels allow you to increase the strength of the finished component or reduce the thickness of the steel - or both. By increasing product performance and helping reduce weight, these steels support you to achieve your optimum performance parameters. The use of dual phase grades increases the output from each tonne of steel and produces products that are strong, light and safe under load. High strain-hardening capacity ensures our dual phase steels have good formability.
Hot forming steel - 22MnB5
Our 22MnB5 product is an uncoated, ultra high-strength hot forming steel. It combines a strength level of 1500 N/mm2 with excellent shape accuracy. Compared with conventional high-strength, low-alloy grades, 22MnB5 offers real opportunities for weight reduction through down-gauging. It also ensures good repeatability in long production runs when compared with cold press forming.
Applications
Body in white (BIW), structural and reinforcement components and lightweight structural seat components
Relationship with standards
Tata Steel can supply the following cold-rolled advanced and ultra high-strength steel grades:
| Tata Steel | VDA | EN 10338: 2015 | EN 10083: 2009 |
|---|---|---|---|
| DP600 | CR330Y590T-DP | HCT590X | - |
| DP800 | CR440Y780T-DP | HCT780X | - |
| 22MnB5 | - | - | 20MnB5 1 |
1. This grade is also widely known as 22MnB5.
EN_US-Product-Cold-rolled-AHSS-CR 22MnB5-Properties TSUK
Properties
Mechanical properties
The values shown for the mechanical properties in the table below are for test pieces taken parallel to the rolling direction.
| As delivered | Grade | CR 22MnB5 Guaranteed |
CR 22MnB5 Typical |
|---|---|---|---|
| Yield strength1 Rp0.2 | N/mm² | ≥ 300 | 340 - 440 |
| Tensile strength Rm | N/mm² | 500 - 580 | 500 - 580 |
| Elongation | % | ≥ 20 | > 21 |
| r-value | - | 0.90 - 1.0 | |
| n-value | - | > 0.150 |
| Hot formed | Grade | CR 22MnB5 Guaranteed |
CR 22MnB5 Typical |
|
|---|---|---|---|---|
| Yield strength 1 Rp0.2 | N/mm² | 1000 - 1250 | 1025 - 1100 | |
| Tensile strength Rm | N/mm² | 1300 - 1600 | 1420 - 1520 | |
| Elongation | % | ≥ 5 | 5 - 7 | |
1. Yield strength refers to the 0.2% proof strength for the product.
Elongation after fraction A uses test piece length L0 = 80 mm.
Chemical composition
The table below shows the chemical composition to the draft EN 10338: 2015 (for dual phase steel) and EN 10083-3: 2006 (for hot forming steel) specifications.
| CR 22MnB5 Guaranteed |
CR 22MnB5 Typical |
||
|---|---|---|---|
| Grade | |||
| C | Max. | 0.23 | 0.22 |
| Mn | Max. | 1.3 | 1.2 |
| P | Max. | 0.02 | 0.01 |
| S | Max. | 0.010 | 0.005 |
| Si | Max. | 0.3 | 0.24 |
| Altot | 0.02 - 0.06 | 0.04 | |
| Cr + Mo 1 | Max. | 0.3 | 0.2 |
| Nb + Ti 2 | Max. | 0.04 | 0.03 |
| V | Max. | - | - |
| B | Max. | 0.005 | 0.003 |
1. Refers to Cr max for CR 22MnB5.
2. Refers to Ti max for CR 22MnB5
All values are in weight%.
EN_US-Product-Cold-rolled-AHSS-CR 22MnB5-Dimensions TSUK
Dimensional capability - Continuously annealed (CA)
Order volumes may apply to some dimensions - please contact us for details.
Dimensions in mm.
| Thickness | Max. width |
|---|---|
| From - up to | CR 22MnB5 |
| 0.90 - 1.20 | 1180 |
| 1.20 - 1.40 | 1230 |
| 1.40 - 1.60 | 1310 |
| 1.60 - 1.80 | 1360 |
| 1.80 - 2.00 | 1380 |
Minimum width is 900 mm.
Please contact us for latest availability.
Tolerances
Tolerances on shape and dimensions comply with standard EN 10131: 2006
Tighter tolerances are available, please contact us for details.
EN_US-Product-Cold-rolled-AHSS-DownloadsTSUK
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