Steel TRIP1000 CR+BH
Heat-treated state
CR+BH = after paint-bake cycle
In-service condition of a formed part after the paint bake: yield strength rises by bake-hardening while elongation of the already-formed blank is consumed.
Values for the CR+BH condition
Other TRIP1000 tempers and conditions
TRIP1000 is listed in 2 conditions; see the grade overview at TRIP1000.
- CR
- CR+BH
Compare all 2 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
CRDefault Cold rolled | Standard bare cold-rolled TRIP1000 coil/sheet for interior structural parts that get e-coat protection after assembly. | 720 | 1,040 | 14 | 32 HRC | 5.7 % IACS |
CR+BHThis page After paint-bake cycle | In-service condition of a formed part after the paint bake: yield strength rises by bake-hardening while elongation of the already-formed blank is consumed. | 770 | 1,055 | 12 | 33 HRC | 5.7 % IACS |
What is TRIP1000 CR+BH?
TRIP1000 CR+BH is TRIP1000 heat treated to CR+BH — in-service condition of a formed part after the paint bake: yield strength rises by bake-hardening while elongation of the already-formed blank is consumed. TRIP1000 CR+BH has a yield strength of 770 MPa (112 ksi) and a tensile strength of 1,055 MPa (153 ksi) — stronger than 85% of steel grades. Elongation at break is 12% and the elastic modulus is 205 GPa (29.7 Msi). TRIP1000 CR+BH 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; CR+BH is available on request or by drawing note.
Advantages
- High strength — 770 MPa (112 ksi), better than 85% of steel grades
Limitations
- Difficult to machine — 23/100, worse than 95% of steel grades
- Limited service temperature — 200°C (392 °F), worse than 93% of steel grades
- Poor heat conductor — 28 W/m·K (16.2 BTU/hr·ft·°F), worse than 85% of steel grades
- Limited ductility — 12%, worse than 84% of steel grades
- Hard to polish — 45/100, worse than 84% of steel grades
TRIP1000 CR+BH properties
Typical room-temperature values for TRIP1000 CR+BH; 21 are specific to this condition. Other listed values are TRIP1000 reference data and may not represent this condition. Bars are the position among steel grades.
Physical3
TRIP1000 CR+BH 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).
Mechanical16
TRIP1000 CR+BH has a yield strength of 770 MPa (112 ksi) and a tensile strength of 1,055 MPa (153 ksi) — stronger than 85% of steel grades. Elongation at break is 12% and the elastic modulus is 205 GPa (29.7 Msi).
Thermal6
TRIP1000 CR+BH is rated for continuous service to 200°C (392 °F). It conducts heat at 28 W/m·K (16.2 BTU/hr·ft·°F), worse than 85% of steel grades. Thermal expansion is 11.5 µm/m·K (6.39 µin/in·°F).
Electrical3
TRIP1000 CR+BH conducts electricity at 5.7 % IACS, worse than 80% of steel grades.
Chemical & Environmental3
Corrosion resistance is not recommended (12/100), worse than 53% of steel grades.
Sustainability4
Producing a kilogram of TRIP1000 CR+BH takes about 31 MJ of energy and emits 2.4 kg of CO₂ — more than 64% of steel grades. Typical recycled content is 20%.
Manufacturability6
TRIP1000 CR+BH's machinability is poor (23/100, worse than 95% of steel grades); weldability good (55/100); formability fair (48/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with TRIP1000 CR+BH
Is TRIP1000 easy to machine?
Poor machinability at ~1000 MPa: use coated carbide or PCBN, rigid setups and low feeds; trimming/piercing is preferred over milling, and punch clearances of 10–15 % of thickness plus sharp tools are needed to avoid burr-initiated edge cracks.
Can TRIP1000 be welded?
Resistance spot welding is standard but with a narrow current window — use pulsed schedules, longer hold times or post-weld tempering pulses to combat interfacial fracture; keep heat input low in laser/MAG welding since the softened HAZ and lost retained austenite reduce local strength, and use low-hydrogen practice.
Can TRIP1000 be formed, bent or molded?
Cold stamp with high blank-holder force and stiff, hardened tooling (Class D2/PM tool steels); the high n-value gives good stretch formability but hole-expansion and stretch-flange limits are low, springback and sidewall curl are large so compensate the die or use post-stretch/restrike.
What surface finishes work on TRIP1000?
Supplied bare (oiled) or zinc coated; phosphate + cathodic e-coat is the normal protection route. Avoid acid pickling and aggressive electroplating on formed parts to limit hydrogen-assisted delayed cracking, and watch liquid-metal embrittlement when welding Zn-coated variants.
TRIP1000 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 retained-austenite carbon enrichment | 0.17 – 0.25 | 0.21 |
| Sisuppresses carbide precipitation during bainitic hold; may be partly replaced by Al in coated grades | 1.2 – 2 | 1.6 |
| Mn | 1.6 – 2.5 | 2 |
| AlSi-Al balanced designs improve galvanizability | 0.02 – 1.2 | 0.3 |
| P | ≤ 0.08 | 0.02 |
| S | ≤ 0.02 | 0 |
| Nbmicroalloy grain refinement (optional) | ≤ 0.06 | 0.03 |
| Tioptional | ≤ 0.06 | 0.02 |
| Voptional | ≤ 0.1 | — |
| Cr+Mooptional hardenability additions | ≤ 0.6 | 0.2 |
| N | ≤ 0.01 | 0.01 |
| Fe | balance | — |
TRIP1000 CR+BH — frequently asked
What is TRIP1000 CR+BH used for?
TRIP1000 CR+BH is typically used for crash boxes, door beams and structural reinforcements. In short: ductile 1000 MPa crash grade; high energy absorption per mass; more elongation than DP980.
What is the yield strength of TRIP1000 CR+BH?
TRIP1000 CR+BH has a typical yield strength of 770 MPa (112 ksi) and a tensile strength of 1,055 MPa (153 ksi) — stronger than 85% of steel grades. Strength varies by condition: see the 2 listed tempers.
Is TRIP1000 CR+BH easy to machine?
Not especially — machinability is rated poor (23/100, worse than 95% of steel grades). Poor machinability at ~1000 MPa: use coated carbide or PCBN, rigid setups and low feeds; trimming/piercing is preferred over milling, and punch clearances of 10–15 % of thickness plus sharp tools are needed to avoid burr-initiated edge cracks.
Can TRIP1000 CR+BH be welded?
Yes — weldability is rated good (55/100). Resistance spot welding is standard but with a narrow current window — use pulsed schedules, longer hold times or post-weld tempering pulses to combat interfacial fracture; keep heat input low in laser/MAG welding since the softened HAZ and lost retained austenite reduce local strength, and use low-hydrogen practice.
What surface finishes work on TRIP1000 CR+BH?
Supplied bare (oiled) or zinc coated; phosphate + cathodic e-coat is the normal protection route. Avoid acid pickling and aggressive electroplating on formed parts to limit hydrogen-assisted delayed cracking, and watch liquid-metal embrittlement when welding Zn-coated variants.
Can TRIP1000 CR+BH be formed, bent or molded?
Cold stamp with high blank-holder force and stiff, hardened tooling (Class D2/PM tool steels); the high n-value gives good stretch formability but hole-expansion and stretch-flange limits are low, springback and sidewall curl are large so compensate the die or use post-stretch/restrike.
What is the maximum service temperature of TRIP1000 CR+BH?
TRIP1000 CR+BH 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.
Sources
- EN 10338 — Hot rolled and cold rolled uncoated multiphase steel products for cold forming — CEN (2015)
- VDA 239-100 — Sheet Steel for Cold Forming (CR700Y980T-TR) — VDA (2016)
- GB/T 20564.5 — Cold rolled high strength steel sheet for automobile: TRIP steel — SAC (2019)
- Advanced High-Strength Steels Application Guidelines V7 — WorldAutoSteel (2021)
- ASM Handbook Vol.1 — Properties and Selection: Irons, Steels, and High-Performance Alloys — ASM International (1990)
- Automotive TRIP/multiphase cold-rolled steel product sheets — ArcelorMittal / thyssenkrupp / Baosteel (2023)
- AWS D8.1M — Specification for Automotive Weld Quality, Resistance Spot Welding of Steel — AWS (2013)
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.