Steel CP600-HR (Hot rolled)
Supply condition
Use for thicker chassis, suspension arms and wheel parts where cold-rolled gauges are not available.
Values for the HR condition
Other CP600 tempers and conditions
CP600 is listed in 2 conditions; see the grade overview at CP600.
- CR
- HR
Compare all 2 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
CRDefault Cold rolled | Standard stocked condition for laser-cut blanks and parts that are painted or coated after forming. | 430 | 640 | 19 | 195 HB | 8.5 % IACS |
HRThis page Hot rolled | Use for thicker chassis, suspension arms and wheel parts where cold-rolled gauges are not available. | 470 | 650 | 18 | 200 HB | 8.5 % IACS |
What is CP600-HR?
CP600-HR is CP600 supplied in the HR condition — use for thicker chassis, suspension arms and wheel parts where cold-rolled gauges are not available. CP600-HR has a yield strength of 470 MPa (68.2 ksi) and a tensile strength of 650 MPa (94.3 ksi) — stronger than 57% of steel grades. Elongation at break is 18% and the elastic modulus is 210 GPa (30.5 Msi). CP600-HR 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). CR is the default condition FabDigit quotes; HR is available on request or by drawing note.
Advantages
- Readily welded — 76/100, better than 77% of steel grades
Limitations
- Limited service temperature — 250°C (482 °F), worse than 85% of steel grades
CP600-HR properties
Typical room-temperature values for CP600-HR; 21 are specific to this condition. Other listed values are CP600 reference data and may not represent this condition. Bars are the position among steel grades.
Physical3
CP600-HR 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
CP600-HR has a yield strength of 470 MPa (68.2 ksi) and a tensile strength of 650 MPa (94.3 ksi) — stronger than 57% of steel grades. Elongation at break is 18% and the elastic modulus is 210 GPa (30.5 Msi).
Thermal6
CP600-HR is rated for continuous service to 250°C (482 °F). It conducts heat at 45 W/m·K (26 BTU/hr·ft·°F), better than 66% of steel grades. Thermal expansion is 12.5 µm/m·K (6.94 µin/in·°F).
Electrical3
CP600-HR conducts electricity at 8.5 % IACS, better than 63% of steel grades.
Chemical & Environmental3
Corrosion resistance is not recommended (11/100), worse than 73% of steel grades.
Sustainability4
Producing a kilogram of CP600-HR takes about 29 MJ of energy and emits 2.2 kg of CO₂ — less than 53% of steel grades. Typical recycled content is 25%.
Manufacturability7
CP600-HR's machinability is fair (41/100, worse than 74% of steel grades); weldability very good (76/100); formability good (55/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with CP600-HR
Is CP600 easy to machine?
Rarely machined — blank by laser, fine blanking or hard punching with high-hardness (PM/coated) tooling and 12–15 % punch clearance to limit burr and edge cracking.
Can CP600 be welded?
Good resistance spot weldability at low carbon equivalent; use AWS D8.1M-type schedules with slightly higher force, and expect some HAZ softening with laser/MAG welding.
Can CP600 be formed, bent or molded?
Best-in-class hole expansion and stretch-flanging; design for high springback (die compensation, high blank-holder force) and avoid deep-draw geometries suited to DP/TRIP steel.
What surface finishes work on CP600?
Zinc coating (GI/GA/EG) plus phosphate and e-coat/paint is the standard system; no anodizing, and avoid hydrogen-charging pickling or acid plating on the strongest lots.
CP600 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 10346 HCT600C maximum | ≤ 0.18 | 0.1 |
| Si | ≤ 0.8 | 0.3 |
| Mn | ≤ 2 | 1.6 |
| P | ≤ 0.08 | 0.02 |
| S | ≤ 0.02 | 0 |
| Altotal Al | ≤ 2 | 0.04 |
| Cr+Mosum | ≤ 1 | 0.3 |
| Nb+Timicroalloy precipitation strengthening | ≤ 0.15 | 0.06 |
| V | ≤ 0.2 | — |
| B | ≤ 0.01 | — |
| Fe | balance | — |
CP600-HR — frequently asked
What is CP600-HR used for?
CP600-HR is typically used for chassis parts, suspension arms and flanged brackets. In short: best hole expansion at 600 MPa; highest weldability in family; edge-crack resistant CP grade.
What is the yield strength of CP600-HR?
CP600-HR has a typical yield strength of 470 MPa (68.2 ksi) and a tensile strength of 650 MPa (94.3 ksi) — stronger than 57% of steel grades. Strength varies by condition: see the 2 listed tempers.
Is CP600-HR easy to machine?
Not especially — machinability is rated fair (41/100, worse than 74% of steel grades). Rarely machined — blank by laser, fine blanking or hard punching with high-hardness (PM/coated) tooling and 12–15 % punch clearance to limit burr and edge cracking.
Can CP600-HR be welded?
Yes — weldability is rated very good (76/100). Good resistance spot weldability at low carbon equivalent; use AWS D8.1M-type schedules with slightly higher force, and expect some HAZ softening with laser/MAG welding.
What surface finishes work on CP600-HR?
Zinc coating (GI/GA/EG) plus phosphate and e-coat/paint is the standard system; no anodizing, and avoid hydrogen-charging pickling or acid plating on the strongest lots.
Can CP600-HR be formed, bent or molded?
Best-in-class hole expansion and stretch-flanging; design for high springback (die compensation, high blank-holder force) and avoid deep-draw geometries suited to DP/TRIP steel.
What is the maximum service temperature of CP600-HR?
CP600-HR is rated for continuous use to about 250°C (482 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between CP600-CR and CP600-HR?
CR is the default condition — standard stocked condition for laser-cut blanks and parts that are painted or coated after forming. HR: use for thicker chassis, suspension arms and wheel parts where cold-rolled gauges are not available. Yield strength is 430 MPa in CR versus 470 MPa in HR.
Sources
- EN 10346 — Continuously hot-dip coated steel flat products (HCT600C/HCT600X) — CEN (2015)
- VDA 239-100 — Sheet steel for cold forming (CR350Y600T-CP) — VDA (2016)
- GB/T 20564 — Cold rolled high strength steel sheet for automobile ( CP) — SAC (2019)
- Advanced High-Strength Steels Application Guidelines V7 — WorldAutoSteel (2021)
- Complex-phase steel CP-W / CP-K product information — thyssenkrupp Steel Europe (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.