Steel DP980 · finish state
Steel DP980-GI
Properties of the GI condition, compared with the other DP980 tempers.
Pick when the stamping needs sacrificial corrosion protection straight from the coil (unexposed body-in-white parts).
What is DP980-GI?
DP980-GI is DP980 supplied in the GI condition — pick when the stamping needs sacrificial corrosion protection straight from the coil (unexposed body-in-white parts). DP980-GI has a yield strength of 670 MPa (97.2 ksi) and a tensile strength of 1,020 MPa (148 ksi) — stronger than 80% of steel grades. Elongation at break is 9% and the elastic modulus is 210 GPa (30.5 Msi). DP980-GI 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; GI is available on request or by drawing note.
Advantages
- Good corrosion resistance — 45/100, better than 98% of steel grades
- High strength — 670 MPa (97.2 ksi), better than 80% of steel grades
Limitations
- Limited ductility — 9%, worse than 93% of steel grades
- Limited service temperature — 200°C (392 °F), worse than 93% of steel grades
- Difficult to machine — 25/100, worse than 93% of steel grades
- Hard to polish — 45/100, worse than 84% of steel grades
DP980-GI properties
Typical room-temperature values for DP980-GI — 8 properties are specific to this condition; the rest are grade-level values shared by every DP980 temper. Each bar shows where the value sits among the steel grades in FabDigit's library — further right is higher.
Physical3
DP980-GI 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-GI has a yield strength of 670 MPa (97.2 ksi) and a tensile strength of 1,020 MPa (148 ksi) — stronger than 80% of steel grades. Elongation at break is 9% and the elastic modulus is 210 GPa (30.5 Msi).
Thermal6
DP980-GI is rated for continuous service to 200°C (392 °F). It conducts heat at 45 W/m·K (26 BTU/hr·ft·°F), better than 66% of steel grades. Thermal expansion is 12 µm/m·K (6.67 µin/in·°F).
Electrical3
DP980-GI conducts electricity at 9 % IACS, better than 70% of steel grades.
Chemical & Environmental3
Corrosion resistance is fair (45/100), better than 98% of steel grades.
Sustainability4
Producing a kilogram of DP980-GI takes about 30 MJ of energy and emits 2.3 kg of CO₂ — more than 55% of steel grades. Typical recycled content is 20%.
Manufacturability7
DP980-GI's machinability is poor (25/100, worse than 93% of steel grades); weldability good (55/100); formability fair (35/100).
Values are nominal handbook figures for design screening. Certified mill or lot data ships with every FabDigit order on request.
Other DP980 tempers and conditions
DP980 is also supplied in 5 other conditions. The full side-by-side table is on the DP980 overview.
- CRDefaultDefault stocked condition: bare cold-rolled coil/blank for structural stampings that are later e-coated or painted.680 MPa yield · 32 HRC
- GIPick when the stamping needs sacrificial corrosion protection straight from the coil (unexposed body-in-white parts).670 MPa yield · 315 HV
Working with DP980-GI
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-GI — frequently asked
What is DP980-GI used for?
DP980-GI 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-GI?
DP980-GI has a typical yield strength of 670 MPa (97.2 ksi) and a tensile strength of 1,020 MPa (148 ksi) — stronger than 80% of steel grades. Strength varies by condition: see the 6 listed tempers.
Is DP980-GI easy to machine?
Not especially — machinability is rated poor (25/100, worse than 93% 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-GI be welded?
Yes — weldability is rated good (55/100). 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-GI?
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-GI 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-GI?
DP980-GI 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-GI?
Yes — DP980-GI is available for sheet metal with instant online pricing. 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.