Steel CP1200
CP1200 (HDT1180C) is a very high-strength complex-phase sheet steel with 1100 MPa yield, 1280 MPa tensile, 6 % elongation and about 39 HRC, combining near-martensitic strength with the edge-stretch behaviour typical of CP grades.
Reference datasheet — CP1200 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
CP1200 tempers and conditions
CP1200 is supplied in 3 conditions, soft to hard. CR is the default FabDigit quotes; the values on this page are for it.
Compare all 3 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Hot rolled | Thicker gauges (2–8 mm) for chassis arms, subframes and wheel discs where roll-forming and high hole expansion are needed. | 1,050 | 1,250 | 8 | 38 HRC | 8 % IACS |
CRDefault Cold rolled | Standard stocked condition for laser-blanked chassis reinforcements that are e-coated after assembly. | 1,100 | 1,280 | 6 | 39 HRC | 8 % IACS |
After 2 % prestrain + paint bake | Reference condition for in-service part strength after stamping and the paint-bake cycle (small bake-hardening gain). | 1,180 | 1,300 | 4 | 40 HRC | 8 % IACS |
Supply forms, finishes and certifications
Ways CP1200 is supplied — form, process route, surface or paperwork — without a datasheet of their own. The property values above apply.
| Option | What it is | Type |
|---|---|---|
EG | Electrogalvanized | Coating |
GA | Galvannealed zinc-iron coating | Coating |
GI | Hot-dip galvanized | Coating |
ZM | Zinc-magnesium-aluminium coated | Coating |
What is CP1200?
CP1200 (HDT1180C) is a very high-strength complex-phase sheet steel with 1100 MPa yield, 1280 MPa tensile, 6 % elongation and about 39 HRC, combining near-martensitic strength with the edge-stretch behaviour typical of CP grades. It is used for stiff, edge-critical chassis and underbody parts and is supplied cold-rolled, hot-rolled, pickled and coated as GI, GA, EG or ZM. Global formability is limited (score 25), arc welding softens the heat-affected zone, and hydrogen-embrittlement risk restricts acid and plating processes. DP1180 is the nearest alternative where flanged pierced holes are not required. CP1200 has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,460°C (2,660 °F). CP1200 has a yield strength of 1,100 MPa (160 ksi) and a tensile strength of 1,280 MPa (186 ksi) — stronger than 93% of steel grades. Elongation at break is 6% and the elastic modulus is 207 GPa (30 Msi).
What is CP1200 used for?
- suspension links
- subframes
- underbody reinforcements
Advantages
- High strength — 1,100 MPa (160 ksi), better than 93% of steel grades
Limitations
- Limited ductility — 6%, worse than 97% 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
- Low fracture toughness — 55 MPa·√m (50.1 ksi·√in), worse than 82% of steel grades
- Poor heat conductor — 34 W/m·K (19.6 BTU/hr·ft·°F), worse than 77% of steel grades
CP1200 properties
Typical room-temperature values for CP1200-CR; bars are the position among steel grades.
Physical3
CP1200 has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,460°C (2,660 °F).
Mechanical16
CP1200 has a yield strength of 1,100 MPa (160 ksi) and a tensile strength of 1,280 MPa (186 ksi) — stronger than 93% of steel grades. Elongation at break is 6% and the elastic modulus is 207 GPa (30 Msi).
Thermal6
CP1200 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 12.5 µm/m·K (6.94 µin/in·°F).
Electrical3
CP1200 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 CP1200 takes about 30 MJ of energy and emits 2.3 kg of CO₂ — more than 56% of steel grades. Typical recycled content is 22%.
Manufacturability7
CP1200's machinability is poor (25/100, worse than 93% of steel grades); weldability good (62/100); 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. CP1200 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with CP1200
Is CP1200 easy to machine?
Rarely machined; use laser or waterjet cutting for blanks, and carbide/CBN tooling with rigid setups if drilling — mechanical piercing needs high-grade punch steels and tight clearances.
Can CP1200 be welded?
Resistance spot welding is standard with adapted current/force and post-weld tempering pulses; arc welding softens the HAZ by 100–250 MPa, so keep heat input low and joints out of peak-load zones.
Can CP1200 be formed, bent or molded?
Cold form with generous radii (≥3–4 t), high blank-holder forces and springback compensation in the die; excellent hole expansion allows flanging of pierced holes that would crack in DP1200.
CP1200 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 |
|---|---|---|
| Ctypical 0.12–0.18 for CP1200 | ≤ 0.23 | 0.16 |
| Si | ≤ 0.8 | 0.35 |
| Mn | ≤ 2.6 | 2.2 |
| P | ≤ 0.04 | 0.01 |
| Slow S for hole-expansion capability | ≤ 0.02 | 0 |
| Altotal Al | 0.02 – 1 | 0.04 |
| CrCr+Mo typically ≤1.0 | ≤ 1 | 0.45 |
| Mo | ≤ 0.5 | 0.18 |
| NbNb+Ti ≤0.15, precipitation strengthening | ≤ 0.15 | 0.05 |
| Ti | ≤ 0.15 | 0.03 |
| Voptional | ≤ 0.2 | 0.01 |
| Bhardenability | ≤ 0.01 | 0 |
| N | ≤ 0.01 | 0.01 |
| Fe | balance |
What surface finishes work on CP1200?
Not anodizable — supply zinc-coated (GI/GA/ZM) or phosphate + cathodic e-coat; avoid acid pickling and standard electroplating cycles because of hydrogen-embrittlement risk at 1200 MPa.
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 CP1200 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- Similar grades
- HDT1180C
How much does CP1200 cost?
CP1200 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.
CP1200 — frequently asked
What is CP1200 used for?
CP1200 is typically used for suspension links, subframes and underbody reinforcements. In short: high hole expansion at 1200 MPa; stiff chassis-grade AHSS; better flanging than DP1200.
What is the yield strength of CP1200?
CP1200 has a typical yield strength of 1,100 MPa (160 ksi) and a tensile strength of 1,280 MPa (186 ksi) — stronger than 93% of steel grades. Strength varies by condition: see the 3 listed tempers.
Is CP1200 easy to machine?
Not especially — machinability is rated poor (25/100, worse than 93% of steel grades). Rarely machined; use laser or waterjet cutting for blanks, and carbide/CBN tooling with rigid setups if drilling — mechanical piercing needs high-grade punch steels and tight clearances.
Can CP1200 be welded?
Yes — weldability is rated good (62/100). Resistance spot welding is standard with adapted current/force and post-weld tempering pulses; arc welding softens the HAZ by 100–250 MPa, so keep heat input low and joints out of peak-load zones.
What surface finishes work on CP1200?
Not anodizable — supply zinc-coated (GI/GA/ZM) or phosphate + cathodic e-coat; avoid acid pickling and standard electroplating cycles because of hydrogen-embrittlement risk at 1200 MPa.
Can CP1200 be formed, bent or molded?
Cold form with generous radii (≥3–4 t), high blank-holder forces and springback compensation in the die; excellent hole expansion allows flanging of pierced holes that would crack in DP1200.
What is the maximum service temperature of CP1200?
CP1200 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 CP1200-CR and CP1200-PB?
CR is the default condition — standard stocked condition for laser-blanked chassis reinforcements that are e-coated after assembly. PB: reference condition for in-service part strength after stamping and the paint-bake cycle (small bake-hardening gain). Yield strength is 1,100 MPa in CR versus 1,180 MPa in PB.
How much does CP1200 cost?
CP1200 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
- VDA 239-100 Sheet Steel for Cold Forming (CR1030Y1200T-CP) — VDA (2016)
- EN 10338 — Hot rolled products of multiphase steels for cold forming (HDT1180C) — CEN (2015)
- EN 10346 — Continuously hot-dip coated steel flat products (HCT1180C) — CEN (2015)
- Advanced High-Strength Steels Application Guidelines v7.0 — WorldAutoSteel (2021)
- Complex-phase CP1200 / CP-W 1200 cold and hot rolled sheet data — thyssenkrupp / SSAB / Baosteel (2023)
- 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; 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.