Steel DP590-HR (Hot rolled)
Supply condition
For thicker gauges (~2–6 mm) such as chassis arms, wheel discs and suspension parts where cold-rolled thickness is unavailable.
Values for the HR condition
Other DP590 tempers and conditions
DP590 is listed in 3 conditions; see the grade overview at DP590.
Compare all 3 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
CRDefault Cold rolled | Default stock condition for stampings that will be phosphated and e-coated; best surface and tightest thickness tolerance. | 370 | 630 | 24 | 185 HB | — |
HRThis page Hot rolled | For thicker gauges (~2–6 mm) such as chassis arms, wheel discs and suspension parts where cold-rolled thickness is unavailable. | 400 | 640 | 22 | 11 HRC | 8.2 % IACS |
Bake-hardened | Design condition for in-service dent and yield performance of a formed and painted DP590 panel. | 460 | 660 | 18 | 195 HB | 8.2 % IACS |
What is DP590-HR?
DP590-HR is DP590 supplied in the HR condition — for thicker gauges (~2–6 mm) such as chassis arms, wheel discs and suspension parts where cold-rolled thickness is unavailable. DP590-HR has a yield strength of 400 MPa (58 ksi) and a tensile strength of 640 MPa (92.8 ksi) — weaker than 60% of steel grades. Elongation at break is 22% and the elastic modulus is 210 GPa (30.5 Msi). DP590-HR has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,480°C (2,696 °F). CR is the default condition FabDigit quotes; HR is available on request or by drawing note.
Advantages
- Readily welded — 84/100, better than 82% of steel grades
- Forms and bends easily — 64/100, better than 79% of steel grades
Limitations
- Limited service temperature — 200°C (392 °F), worse than 93% of steel grades
- Hard to polish — 45/100, worse than 84% of steel grades
DP590-HR properties
Typical room-temperature values for DP590-HR; 22 are specific to this condition. Other listed values are DP590 reference data and may not represent this condition. Bars are the position among steel grades.
Physical3
DP590-HR has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,480°C (2,696 °F).
Mechanical14
DP590-HR has a yield strength of 400 MPa (58 ksi) and a tensile strength of 640 MPa (92.8 ksi) — weaker than 60% of steel grades. Elongation at break is 22% and the elastic modulus is 210 GPa (30.5 Msi).
Thermal6
DP590-HR is rated for continuous service to 200°C (392 °F). It conducts heat at 47 W/m·K (27.2 BTU/hr·ft·°F), better than 75% of steel grades. Thermal expansion is 12 µm/m·K (6.67 µin/in·°F).
Electrical3
DP590-HR conducts electricity at 8.2 % IACS, better than 61% of steel grades.
Chemical & Environmental3
Corrosion resistance is not recommended (11/100), worse than 73% of steel grades.
Sustainability4
Producing a kilogram of DP590-HR takes about 25 MJ of energy and emits 2.3 kg of CO₂ — less than 82% of steel grades. Typical recycled content is 25%.
Manufacturability7
DP590-HR's machinability is fair (50/100, worse than 53% of steel grades); weldability very good (84/100); formability good (64/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with DP590-HR
Is DP590 easy to machine?
Trim, pierce and laser/plasma cut readily, but use higher-grade tool steel or coated punches — cut-edge quality drives hole-expansion cracking more than tool life.
Can DP590 be welded?
Excellent resistance spot weldability with a wide current range thanks to low carbon equivalent; MIG/laser welds are sound but expect modest HAZ softening and avoid high heat input.
Can DP590 be formed, bent or molded?
Stretch/draw-form with 10–25 % higher press tonnage than mild steel, allow for greater springback (over-bend, stake beads) and keep sheared-edge stretching low.
What surface finishes work on DP590?
Zinc-coated variants go straight to phosphate + e-coat; uncoated CR must be oiled and painted promptly since bare DP590 has no inherent corrosion resistance.
DP590 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 |
|---|---|---|
| Ckept low for spot weldability | 0.06 – 0.14 | 0.09 |
| Mn | 0.9 – 2 | 1.5 |
| Si | 0.05 – 0.6 | 0.25 |
| Cr+Mohardenability, martensite formation on cooling | 0 – 1 | 0.25 |
| Aldeoxidation | 0.02 – 0.15 | 0.04 |
| Nb+Tigrain refinement (optional) | 0 – 0.15 | 0.03 |
| P | ≤ 0.04 | 0.02 |
| S | ≤ 0.02 | 0.01 |
| Fe | balance | — |
DP590-HR — frequently asked
What is DP590-HR used for?
DP590-HR is typically used for automotive cross beams, crash structures, seat frames, body rails and reinforcements, wheel discs and suspension brackets. In short: dual-phase sheet steel.
What is the yield strength of DP590-HR?
DP590-HR has a typical yield strength of 400 MPa (58 ksi) and a tensile strength of 640 MPa (92.8 ksi) — weaker than 60% of steel grades. Strength varies by condition: see the 3 listed tempers.
Is DP590-HR easy to machine?
Reasonably — machinability is rated fair (50/100, worse than 53% of steel grades). Trim, pierce and laser/plasma cut readily, but use higher-grade tool steel or coated punches — cut-edge quality drives hole-expansion cracking more than tool life.
Can DP590-HR be welded?
Yes — weldability is rated very good (84/100). Excellent resistance spot weldability with a wide current range thanks to low carbon equivalent; MIG/laser welds are sound but expect modest HAZ softening and avoid high heat input.
What surface finishes work on DP590-HR?
Zinc-coated variants go straight to phosphate + e-coat; uncoated CR must be oiled and painted promptly since bare DP590 has no inherent corrosion resistance.
Can DP590-HR be formed, bent or molded?
Stretch/draw-form with 10–25 % higher press tonnage than mild steel, allow for greater springback (over-bend, stake beads) and keep sheared-edge stretching low.
What is the maximum service temperature of DP590-HR?
DP590-HR 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 DP590-CR and DP590-BH?
CR is the default condition — default stock condition for stampings that will be phosphated and e-coated; best surface and tightest thickness tolerance. BH: design condition for in-service dent and yield performance of a formed and painted DP590 panel. Yield strength is 370 MPa in CR versus 460 MPa in BH.
Can FabDigit make parts in DP590-HR?
Yes — DP590-HR 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 10346 — Continuously hot-dip coated steel flat products (HCT590X, HDT580X) — CEN (2015)
- SAE J2745 / SAE J2340 — High-strength automotive sheet steel — SAE International (2019)
- Advanced High-Strength Steels Application Guidelines V7 — WorldAutoSteel (2021)
- Dual Phase DP 330/590 automotive steel datasheet — ArcelorMittal (2022)
- ASM Handbook Vol.1 — Properties and Selection: Irons, Steels — ASM International (1990)
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.