Steel 09CuPCrNi-HR (Hot rolled)
Supply condition · default condition
GB 09CuPCrNi
Standard stocked condition for weathering plate, coil and railcar sheet; pick unless low-temperature toughness certification is required.
Values for the HR 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 |
HRDefaultThis page 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 |
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-HR?
09CuPCrNi-HR is 09CuPCrNi supplied in the HR condition — standard stocked condition for weathering plate, coil and railcar sheet; pick unless low-temperature toughness certification is required. 09CuPCrNi-HR has a yield strength of 300 MPa (43.5 ksi) and a tensile strength of 450 MPa (65.3 ksi) — weaker than 86% of steel grades. Elongation at break is 31% and the elastic modulus is 206 GPa (29.9 Msi). 09CuPCrNi-HR 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).
Advantages
- Good corrosion resistance — 32/100, better than 96% of steel grades
- Ductile — tolerates forming and impact — 31%, better than 94% of steel grades
- Forms and bends easily — 75/100, better than 90% of steel grades
- Easy to machine — 62/100, better than 89% of steel grades
- Conducts heat well — 48 W/m·K (27.7 BTU/hr·ft·°F), better than 79% of steel grades
Limitations
- Low strength — 300 MPa (43.5 ksi), worse than 86% of steel grades
- Hard to polish — 45/100, worse than 84% of steel grades
09CuPCrNi-HR properties
Typical room-temperature values for 09CuPCrNi-HR; 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-HR 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-HR has a yield strength of 300 MPa (43.5 ksi) and a tensile strength of 450 MPa (65.3 ksi) — weaker than 86% of steel grades. Elongation at break is 31% and the elastic modulus is 206 GPa (29.9 Msi).
Thermal6
09CuPCrNi-HR is rated for continuous service to 350°C (662 °F). It conducts heat at 48 W/m·K (27.7 BTU/hr·ft·°F), better than 79% of steel grades. Thermal expansion is 12 µm/m·K (6.67 µin/in·°F).
Electrical3
09CuPCrNi-HR 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-HR 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-HR's machinability is good (62/100, better than 89% of steel grades); weldability very good (78/100); formability very good (75/100).
Common Calculations5
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with 09CuPCrNi-HR
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-HR — frequently asked
What is 09CuPCrNi-HR used for?
09CuPCrNi-HR 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-HR?
09CuPCrNi-HR has a typical yield strength of 300 MPa (43.5 ksi) and a tensile strength of 450 MPa (65.3 ksi) — weaker than 86% of steel grades. Strength varies by condition: see the 5 listed tempers.
Is 09CuPCrNi-HR easy to machine?
Reasonably — machinability is rated good (62/100, better than 89% 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-HR be welded?
Yes — weldability is rated very good (78/100). 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-HR?
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-HR 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-HR?
09CuPCrNi-HR 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.