Steel DP1180
DP1180 (HCT1180X) is an ultra-high-strength dual-phase sheet steel for crash-critical body-in-white members, with about 950 MPa yield, 1230 MPa tensile, 7 % elongation and 38 HRC.
Reference datasheet — DP1180 is not in the instant-quote catalog. Upload your part and an engineer will quote it in this grade or suggest the closest stocked equivalent.
Values for the CR condition
DP1180 tempers and conditions
DP1180 is supplied in 5 conditions, soft to hard. CR is the default FabDigit quotes; the values on this page are for it.
Compare all 5 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Hot-dip galvanized (GI), HCT1180X+Z | Choose for corrosion-exposed body-in-white members needing cathodic protection; watch liquid-metal-embrittlement limits in spot welding. | 930 | 1,220 | 7 | 38 HRC | 8 % IACS |
Galvannealed (GA), HCT1180X+ZF | Zn-Fe alloy coating preferred where paint adhesion and spot-weld electrode life matter more than coating ductility. | 940 | 1,220 | 6.5 | 38 HRC | 8 % IACS |
CRDefault Cold rolled | Standard uncoated cold-rolled DP1180 coil/blank for interior structural parts that are e-coated after assembly. | 950 | 1,230 | 7 | 38 HRC | 8 % IACS |
Electrogalvanized | Thin, uniform electroplated zinc for tight-tolerance stampings and good surface quality; requires hydrogen-relief baking at this strength level. | 950 | 1,230 | 7 | 38 HRC | 8 % IACS |
After paint-bake | Use for as-installed part strength in crash simulation: forming plus paint-bake raises the yield strength appreciably. | 1,080 | 1,250 | 5 | 39 HRC | 8 % IACS |
What is DP1180?
DP1180 (HCT1180X) is an ultra-high-strength dual-phase sheet steel for crash-critical body-in-white members, with about 950 MPa yield, 1230 MPa tensile, 7 % elongation and 38 HRC. It is supplied cold-rolled, in BH temper and with +Z, +ZF or +ZE zinc coatings, and is selected where high strength must be combined with moderate cold formability. Bend radii of 3–4 t, limited hole expansion and high press tonnage constrain part geometry, and zinc-coated sheet is sensitive to liquid metal embrittlement during spot welding; press-hardened 22MnB5 is the alternative when the geometry exceeds cold-stamping limits. DP1180 has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,425°C (2,597 °F). DP1180 has a yield strength of 950 MPa (138 ksi) and a tensile strength of 1,230 MPa (178 ksi) — stronger than 91% of steel grades. Elongation at break is 7% and the elastic modulus is 205 GPa (29.7 Msi).
What is DP1180 used for?
- door rings
- B-pillar reinforcements
- bumper beams
- sill reinforcements
Advantages
- High strength — 950 MPa (138 ksi), better than 91% of steel grades
Limitations
- Limited ductility — 7%, worse than 96% of steel grades
- Limited service temperature — 200°C (392 °F), worse than 93% of steel grades
- Difficult to machine — 28/100, worse than 91% of steel grades
- Low fracture toughness — 50 MPa·√m (45.5 ksi·√in), worse than 86% of steel grades
- Hard to polish — 45/100, worse than 84% of steel grades
DP1180 properties
Typical room-temperature values for DP1180-CR; bars are the position among steel grades.
Physical3
DP1180 has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,425°C (2,597 °F).
Mechanical15
DP1180 has a yield strength of 950 MPa (138 ksi) and a tensile strength of 1,230 MPa (178 ksi) — stronger than 91% of steel grades. Elongation at break is 7% and the elastic modulus is 205 GPa (29.7 Msi).
Thermal6
DP1180 is rated for continuous service to 200°C (392 °F). It conducts heat at 34 W/m·K (19.6 BTU/hr·ft·°F), worse than 77% of steel grades. Thermal expansion is 12 µm/m·K (6.67 µin/in·°F).
Electrical3
DP1180 conducts electricity at 8 % IACS, better than 55% of steel grades.
Chemical & Environmental3
Corrosion resistance is not recommended (12/100), worse than 53% of steel grades.
Sustainability4
Producing a kilogram of DP1180 takes about 30 MJ of energy and emits 2.4 kg of CO₂ — more than 56% of steel grades. Typical recycled content is 25%.
Manufacturability7
DP1180's machinability is poor (28/100, worse than 91% of steel grades); weldability good (65/100); formability poor (25/100).
Common Calculations5
Values are nominal handbook figures for design screening. Certified mill or lot data ships with every FabDigit order on request.
Strength versus weight in the steel family
Yield strength against density for every steel grade FabDigit runs. DP1180 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with DP1180
Is DP1180 easy to machine?
Rarely machined — blank by laser or carbide/PM tooling with large clearance; expect fast punch wear and prefer laser or waterjet cutting of hardened edges.
Can DP1180 be welded?
Good resistance spot weldability with in-process pulsing/post-heat to improve nugget toughness; on Zn-coated grades control heat input and electrode force to avoid liquid metal embrittlement, and avoid oxy-fuel/soft filler arc welds that soften the HAZ.
Can DP1180 be formed, bent or molded?
Cold stamping only with high-tonnage presses, generous bend radii (≥3–4 t), stretch-flange-safe trimmed edges (laser trim preferred) and springback compensation in the die face; hole expansion is limited.
DP1180 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 |
|---|---|---|
| CEN 10338 HCT1180X ladle max; producers typically 0.13–0.19 | ≤ 0.23 | 0.16 |
| Si | ≤ 1 | 0.3 |
| Mn | ≤ 3 | 2.3 |
| P | ≤ 0.08 | 0.01 |
| S | ≤ 0.02 | 0 |
| Altotal Al | 0.02 – 2 | 0.04 |
| Cr+Mohardenability additions | ≤ 1.4 | 0.4 |
| Nb+Tigrain refinement / precipitation | ≤ 0.15 | 0.04 |
| V | ≤ 0.2 | |
| B | ≤ 0.01 | 0 |
| Fe | balance |
What surface finishes work on DP1180?
Zinc coating (GI/GA/EG) plus phosphate and cataphoretic e-coat is the standard system; avoid acid pickling or electroplating without baking due to delayed-fracture/hydrogen risk.
Surface treatments FabDigit runs on steel parts — pick them in the quote configurator or call them out on the drawing. Each links to its datasheet in the surface-finish library (thickness, specs, call-out, material verdicts).
Organic Coating
Black / Phosphate
Thermal Spray
Equivalent designations
Standards and trade names that resolve to Steel DP1180 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- Similar grades
- HCT1180X
How much does DP1180 cost?
DP1180 is a budget-cost steel ($), cheaper than about 90% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
DP1180 — frequently asked
What is DP1180 used for?
DP1180 is typically used for door rings, B-pillar reinforcements, bumper beams and sill reinforcements. In short: highest-strength cold-formable DP; crash-critical BIW grade; only 7 % elongation.
What is the yield strength of DP1180?
DP1180 has a typical yield strength of 950 MPa (138 ksi) and a tensile strength of 1,230 MPa (178 ksi) — stronger than 91% of steel grades. Strength varies by condition: see the 5 listed tempers.
Is DP1180 easy to machine?
Not especially — machinability is rated poor (28/100, worse than 91% of steel grades). Rarely machined — blank by laser or carbide/PM tooling with large clearance; expect fast punch wear and prefer laser or waterjet cutting of hardened edges.
Can DP1180 be welded?
Yes — weldability is rated good (65/100). Good resistance spot weldability with in-process pulsing/post-heat to improve nugget toughness; on Zn-coated grades control heat input and electrode force to avoid liquid metal embrittlement, and avoid oxy-fuel/soft filler arc welds that soften the HAZ.
What surface finishes work on DP1180?
Zinc coating (GI/GA/EG) plus phosphate and cataphoretic e-coat is the standard system; avoid acid pickling or electroplating without baking due to delayed-fracture/hydrogen risk.
Can DP1180 be formed, bent or molded?
Cold stamping only with high-tonnage presses, generous bend radii (≥3–4 t), stretch-flange-safe trimmed edges (laser trim preferred) and springback compensation in the die face; hole expansion is limited.
What is the maximum service temperature of DP1180?
DP1180 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 DP1180-CR and DP1180-BH?
CR is the default condition — standard uncoated cold-rolled DP1180 coil/blank for interior structural parts that are e-coated after assembly. BH: use for as-installed part strength in crash simulation: forming plus paint-bake raises the yield strength appreciably. Yield strength is 950 MPa in CR versus 1,080 MPa in BH.
How much does DP1180 cost?
DP1180 is a budget-cost steel ($), cheaper than about 90% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
Sources
- EN 10338 — Hot rolled and cold rolled uncoated products of multiphase steels for cold forming — CEN (2015)
- EN 10346 — Continuously hot-dip coated steel flat products (HCT1180X+Z/+ZF) — CEN (2015)
- VDA 239-100 — Sheet steel for cold forming (dual-phase grades) — VDA (2016)
- Advanced High-Strength Steels Application Guidelines V7 — WorldAutoSteel (2021)
- Dual phase steel DP1180 cold-rolled / galvanized coil datasheets — Baosteel / ArcelorMittal / voestalpine (2023)
Property data is compiled from published supplier and standards handbooks and normalised for comparison; hardness values on non-Brinell scales are converted approximately for charting only. Manufacturability limits are FabDigit quote-engine defaults and may be relaxed by engineering review. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.