Steel DP980-HY
Grade
HY = high-yield (Y700-class) DP980 variant
Pick for crash/anti-intrusion members where high yield and dent/collapse resistance dominate and forming is mild (roll forming, simple stampings).
Values for the HY condition
Other DP980 tempers and conditions
DP980 is listed in 3 conditions; see the grade overview at DP980.
Compare all 3 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Low-yield (Y550-class) DP980 variant, higher n-value | Select when stretch formability and springback control matter more than crash yield strength (deeper draws, complex geometry). | 620 | 1,010 | 11 | 30 HRC | 9 % IACS |
CRDefault Cold rolled | Default stocked condition: bare cold-rolled coil/blank for structural stampings that are later e-coated or painted. | 680 | 1,030 | 9 | 32 HRC | — |
HYThis page High-yield (Y700-class) DP980 variant | Pick for crash/anti-intrusion members where high yield and dent/collapse resistance dominate and forming is mild (roll forming, simple stampings). | 780 | 1,050 | 8 | 33 HRC | 9 % IACS |
What is DP980-HY?
DP980-HY is DP980 in the HY grade — pick for crash/anti-intrusion members where high yield and dent/collapse resistance dominate and forming is mild (roll forming, simple stampings). DP980-HY has a yield strength of 780 MPa (113 ksi) and a tensile strength of 1,050 MPa (152 ksi) — stronger than 86% of steel grades. Elongation at break is 8% and the elastic modulus is 210 GPa (30.5 Msi). DP980-HY has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,450°C (2,642 °F). CR is the default condition FabDigit quotes; HY is available on request or by drawing note.
Advantages
- High strength — 780 MPa (113 ksi), better than 86% of steel grades
Limitations
- Limited ductility — 8%, worse than 95% of steel grades
- Difficult to machine — 23/100, worse than 95% of steel grades
- Limited service temperature — 200°C (392 °F), worse than 93% of steel grades
- Hard to polish — 45/100, worse than 84% of steel grades
DP980-HY properties
Typical room-temperature values for DP980-HY; 22 are specific to this condition. Other listed values are DP980 reference data and may not represent this condition. Bars are the position among steel grades.
Physical3
DP980-HY has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,450°C (2,642 °F).
Mechanical12
DP980-HY has a yield strength of 780 MPa (113 ksi) and a tensile strength of 1,050 MPa (152 ksi) — stronger than 86% of steel grades. Elongation at break is 8% and the elastic modulus is 210 GPa (30.5 Msi).
Thermal6
DP980-HY is rated for continuous service to 200°C (392 °F). It conducts heat at 44 W/m·K (25.4 BTU/hr·ft·°F), better than 57% of steel grades. Thermal expansion is 12 µm/m·K (6.67 µin/in·°F).
Electrical3
DP980-HY conducts electricity at 9 % IACS, better than 71% of steel grades.
Chemical & Environmental3
Corrosion resistance is not recommended (10/100), worse than 86% of steel grades.
Sustainability4
Producing a kilogram of DP980-HY takes about 30 MJ of energy and emits 2.3 kg of CO₂ — more than 56% of steel grades. Typical recycled content is 20%.
Manufacturability7
DP980-HY's machinability is poor (23/100, worse than 95% of steel grades); weldability good (58/100); formability poor (30/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with DP980-HY
Is DP980 easy to machine?
Rarely machined; trim/pierce with high-hardness (PM or carbide) tooling, ≥12 % clearance and shear angles to limit edge cracking, since cut edges lose local ductility.
Can DP980 be welded?
Resistance spot weldable but use lower current with longer/pulsed schedules plus post-weld tempering pulse to reduce HAZ softening and interfacial (button-pullout) failure; for arc/laser welds keep heat input low and avoid hydrogen-bearing consumables.
Can DP980 be formed, bent or molded?
Cold formable but low total elongation and hole-expansion: allow 3–5× more springback compensation than mild steel, use generous bend radii (≈3–4 t), minimize burr and stretched edges, and expect high press tonnage (~2–3× mild steel).
What surface finishes work on DP980?
No inherent corrosion resistance — supply as GI/GA/EG coil or phosphate + cathodic e-coat/paint; avoid acid pickling or electroplating without immediate bake-out because of delayed hydrogen-assisted cracking risk.
DP980 chemical composition (wt %)
Limits by weight percent from the governing specification, written the way the spec states them — a single maximum for impurities, a range for alloying elements, and the base element as balance. Nominal is the typical mid-range value.
| Element | Spec limit (wt %) | Nominal |
|---|---|---|
| Ccontrols martensite hardness | 0.08 – 0.17 | 0.13 |
| Mnhardenability | 1.5 – 2.6 | 2.2 |
| Si | 0.1 – 0.8 | 0.4 |
| CrCr+Mo typically ≤1.0 % | 0 – 0.6 | 0.25 |
| Mosuppresses bainite/pearlite on cooling | 0 – 0.4 | 0.2 |
| Aldeoxidation | 0.02 – 0.1 | 0.04 |
| Nbmicroalloy, grain refinement | 0 – 0.06 | 0.03 |
| Timicroalloy | 0 – 0.06 | 0.02 |
| Pimpurity limit | ≤ 0.04 | 0.01 |
| Simpurity limit | ≤ 0.02 | 0 |
| Boptional, some producers | 0 – 0.01 | — |
| Fe | balance | — |
DP980-HY — frequently asked
What is DP980-HY used for?
DP980-HY is typically used for bumper beams, B-pillar reinforcements, rocker and sill beams, front and rear rails, door intrusion beams and seat frame structures. In short: premium dual-phase sheet.
What is the yield strength of DP980-HY?
DP980-HY has a typical yield strength of 780 MPa (113 ksi) and a tensile strength of 1,050 MPa (152 ksi) — stronger than 86% of steel grades. Strength varies by condition: see the 3 listed tempers.
Is DP980-HY easy to machine?
Not especially — machinability is rated poor (23/100, worse than 95% of steel grades). Rarely machined; trim/pierce with high-hardness (PM or carbide) tooling, ≥12 % clearance and shear angles to limit edge cracking, since cut edges lose local ductility.
Can DP980-HY be welded?
Yes — weldability is rated good (58/100). Resistance spot weldable but use lower current with longer/pulsed schedules plus post-weld tempering pulse to reduce HAZ softening and interfacial (button-pullout) failure; for arc/laser welds keep heat input low and avoid hydrogen-bearing consumables.
What surface finishes work on DP980-HY?
No inherent corrosion resistance — supply as GI/GA/EG coil or phosphate + cathodic e-coat/paint; avoid acid pickling or electroplating without immediate bake-out because of delayed hydrogen-assisted cracking risk.
Can DP980-HY be formed, bent or molded?
Cold formable but low total elongation and hole-expansion: allow 3–5× more springback compensation than mild steel, use generous bend radii (≈3–4 t), minimize burr and stretched edges, and expect high press tonnage (~2–3× mild steel).
What is the maximum service temperature of DP980-HY?
DP980-HY is rated for continuous use to about 200°C (392 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between DP980-CR and DP980-HY?
CR is the default condition — default stocked condition: bare cold-rolled coil/blank for structural stampings that are later e-coated or painted. HY: pick for crash/anti-intrusion members where high yield and dent/collapse resistance dominate and forming is mild (roll forming, simple stampings). Yield strength is 680 MPa in CR versus 780 MPa in HY.
Can FabDigit make parts in DP980-HY?
Yes — DP980-HY is available for sheet metal; every part is priced by an engineer rather than instantly. Upload a STEP file to get a price and a DFM check.
Sources
- EN 10338 — Hot-rolled and cold-rolled uncoated multiphase steel products (HCT980X) — CEN (2015)
- VDA 239-100 — Sheet steel for cold forming (CR700Y980T-DP) — VDA (2016)
- Advanced High-Strength Steels Application Guidelines v7.0 — WorldAutoSteel (2021)
- ASM Handbook Vol.1 — Properties and Selection: Irons, Steels, and High-Performance Alloys — ASM International (1990)
- Dual-phase DP980 cold-rolled and coated steel datasheets — Baosteel / ArcelorMittal / POSCO (2023)
Property data is compiled from published supplier and standards handbooks and normalised for comparison. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.