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Retained-austenite (TRIP steel) | HCT690T - HCT780T
Choose your retained austenite steel (TRIP steel) in grades HCT690T and HCT780T here.
The experts at our locations are happy to advise you. We look forward to hearing from you.
Properties of Retained-austenite steel | DIN EN 10 338
Steel type
| Short designation | VDA239-100* | Material number |
| HCT690T | CR400Y690T-TR | 1.0947 |
| HCT780T | CR450Y780T-TR | 1.0948 |
Mechanical properties (longitudinal)
| Short designation | Proof stress Rp0.2 MPa | Tensile strength Rm MPa | Elongation at fracture A801) % min. | Strain hardening exponent nn10-UE | Bake hardening index BH2 min. |
| HCT690T | 400-520 | 690 | 23 | 0.19 | 40 |
| HCT780T | 450-570 | 780 | 21 | 0.16 | 40 |
Chemical composition (heat analysis)
| Short designation | Percentage by weight % max. | |||||||||
| C | Si | Mn | P | S | AItotal (span) | Cr+Mo | Nb+Ti | V | B | |
| HCT690T | 0.24 | 2.00 | 2.20 | 0.080 | 0.015 | 0.015-2.0 | 0.60 | 0.20 | 0.20 | 0.005 |
| HCT780T | 0.25 | 2.20 | 2.50 | 0.080 | 0.015 | 0.015-2.0 | 0.60 | 0.20 | 0.20 | 0.005 |
Your product of choice: HCT690T - HCT780T
1) Reduced minimum values of elongation at fracture apply to product thicknesses t < 0.60 mm (minus 2 units).