Steel 09CuPCrNi TMCP
Supply condition
GB 09CuPCrNi
TMCP = thermomechanically controlled processed
Use where higher strength plus good toughness and low carbon equivalent for welding are wanted from the same chemistry.
Values for the TMCP condition
Other 09CuPCrNi tempers and conditions
09CuPCrNi is listed in 5 conditions; see the grade overview at 09CuPCrNi.
Compare all 5 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Solution annealed | Rarely stocked; specify when severe cold forming or flanging of thin weathering sheet is needed. | 260 | 420 | 36 | 120 HB | 8.7 % IACS |
HRDefault Hot rolled | Standard stocked condition for weathering plate, coil and railcar sheet; pick unless low-temperature toughness certification is required. | 300 | 450 | 31 | 135 HB | 8.6 % IACS |
Normalized | Choose for thicker plate needing uniform fine-grain structure and guaranteed low-temperature (-40 °C) impact values. | 315 | 460 | 33 | 140 HB | 8.6 % IACS |
TMCPThis page Thermomechanically controlled processed | Use where higher strength plus good toughness and low carbon equivalent for welding are wanted from the same chemistry. | 350 | 490 | 30 | 150 HB | 8.6 % IACS |
Cold rolled | Thin (0.5–3 mm) cold-rolled coil for container and railcar panels needing tight thickness tolerance and smooth surface. | 400 | 520 | 22 | 160 HB | 8.6 % IACS |
What is 09CuPCrNi TMCP?
09CuPCrNi TMCP is 09CuPCrNi supplied in the TMCP condition — use where higher strength plus good toughness and low carbon equivalent for welding are wanted from the same chemistry. 09CuPCrNi TMCP has a yield strength of 350 MPa (50.8 ksi) and a tensile strength of 490 MPa (71.1 ksi) — weaker than 74% of steel grades. Elongation at break is 30% and the elastic modulus is 206 GPa (29.9 Msi). 09CuPCrNi TMCP 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). HR is the default condition FabDigit quotes; TMCP is available on request or by drawing note.
Advantages
- Good corrosion resistance — 32/100, better than 96% of steel grades
- Ductile — tolerates forming and impact — 30%, better than 93% of steel grades
- Forms and bends easily — 70/100, better than 86% of steel grades
- Tough — resists crack growth — 120 MPa·√m (109.2 ksi·√in), better than 81% of steel grades
- Readily welded — 82/100, better than 81% of steel grades
Limitations
- Hard to polish — 45/100, worse than 84% of steel grades
09CuPCrNi TMCP properties
Typical room-temperature values for 09CuPCrNi TMCP; 22 are specific to this condition. Other listed values are 09CuPCrNi reference data and may not represent this condition. Bars are the position among steel grades.
Physical3
09CuPCrNi TMCP 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
09CuPCrNi TMCP has a yield strength of 350 MPa (50.8 ksi) and a tensile strength of 490 MPa (71.1 ksi) — weaker than 74% of steel grades. Elongation at break is 30% and the elastic modulus is 206 GPa (29.9 Msi).
Thermal6
09CuPCrNi TMCP is rated for continuous service to 350°C (662 °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
09CuPCrNi TMCP conducts electricity at 8.6 % IACS, better than 66% of steel grades.
Chemical & Environmental3
Corrosion resistance is poor (32/100), better than 96% of steel grades.
Sustainability4
Producing a kilogram of 09CuPCrNi TMCP takes about 25 MJ of energy and emits 2 kg of CO₂ — less than 82% of steel grades. Typical recycled content is 25%.
Manufacturability7
09CuPCrNi TMCP's machinability is good (57/100, better than 71% of steel grades); weldability very good (82/100); formability very good (70/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with 09CuPCrNi TMCP
Is 09CuPCrNi easy to machine?
Machines like a 250–300 MPa-yield HSLA steel: ~65 % of AISI 1212 speeds, sticky gummy chips in the as-rolled state, so use positive rake and sharp coated carbide.
Can 09CuPCrNi be welded?
Readily welded by SMAW/GMAW/SAW with weathering-matching consumables (e.g. E5015-G Cu-Cr-Ni type) so the weld patinas with the base metal; keep heat input moderate and preheat 50–100 °C on thicker plate because of the high phosphorus content.
Can 09CuPCrNi be formed, bent or molded?
Good cold bendability in hot-rolled or annealed sheet (bend radius ≈2t); phosphorus raises the risk of edge cracking, so deburr sheared edges before tight bends.
What surface finishes work on 09CuPCrNi?
Normally left unpainted to develop its patina — surfaces must be free-draining and mill scale/grease removed for an even rust colour; if coating is wanted, blast to Sa 2.5 and use an epoxy primer, and expect rust run-off staining of adjacent concrete or aluminium.
09CuPCrNi 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 |
|---|---|---|
| C≤0.12 % per GB/T 4171 Q265GNH | ≤ 0.12 | 0.09 |
| Si | 0.2 – 0.75 | 0.35 |
| Mn | 0.2 – 0.5 | 0.35 |
| Pdeliberate addition for patina stability | 0.07 – 0.12 | 0.09 |
| S | ≤ 0.03 | 0.02 |
| Cu | 0.2 – 0.5 | 0.35 |
| Cr | 0.3 – 1.25 | 0.6 |
| Ni | 0.12 – 0.65 | 0.3 |
| Fe | balance | — |
09CuPCrNi TMCP — frequently asked
What is 09CuPCrNi TMCP used for?
09CuPCrNi TMCP is typically used for railway hopper cars, outdoor sculptures and shipping equipment. In short: classic Corten-type weathering steel; most formable weathering grade; superseded by Q355NH.
What is the yield strength of 09CuPCrNi TMCP?
09CuPCrNi TMCP has a typical yield strength of 350 MPa (50.8 ksi) and a tensile strength of 490 MPa (71.1 ksi) — weaker than 74% of steel grades. Strength varies by condition: see the 5 listed tempers.
Is 09CuPCrNi TMCP easy to machine?
Reasonably — machinability is rated good (57/100, better than 71% of steel grades). Machines like a 250–300 MPa-yield HSLA steel: ~65 % of AISI 1212 speeds, sticky gummy chips in the as-rolled state, so use positive rake and sharp coated carbide.
Can 09CuPCrNi TMCP be welded?
Yes — weldability is rated very good (82/100). Readily welded by SMAW/GMAW/SAW with weathering-matching consumables (e.g. E5015-G Cu-Cr-Ni type) so the weld patinas with the base metal; keep heat input moderate and preheat 50–100 °C on thicker plate because of the high phosphorus content.
What surface finishes work on 09CuPCrNi TMCP?
Normally left unpainted to develop its patina — surfaces must be free-draining and mill scale/grease removed for an even rust colour; if coating is wanted, blast to Sa 2.5 and use an epoxy primer, and expect rust run-off staining of adjacent concrete or aluminium.
Can 09CuPCrNi TMCP be formed, bent or molded?
Good cold bendability in hot-rolled or annealed sheet (bend radius ≈2t); phosphorus raises the risk of edge cracking, so deburr sheared edges before tight bends.
What is the maximum service temperature of 09CuPCrNi TMCP?
09CuPCrNi TMCP is rated for continuous use to about 350°C (662 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between 09CuPCrNi-HR and 09CuPCrNi-CR?
HR is the default condition — standard stocked condition for weathering plate, coil and railcar sheet; pick unless low-temperature toughness certification is required. CR: thin (0.5–3 mm) cold-rolled coil for container and railcar panels needing tight thickness tolerance and smooth surface. Yield strength is 300 MPa in HR versus 400 MPa in CR.
Sources
- GB/T 4171-2008 (Atmospheric corrosion resisting structural steel) (2008)
- ASTM A242/A242M Standard Specification for High-Strength Low-Alloy Structural Steel — ASTM International (2018)
- TB/T 1979 (railway vehicle weathering steel) (2013)
- ASM Handbook Vol.1 — Properties and Selection: Irons, Steels, and High-Performance Alloys (HSLA & weathering steels) — ASM International (1990)
- ASM Handbook Vol.13B — Corrosion: Materials (atmospheric corrosion of weathering steel) — ASM International (2005)
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.