Steel CRNGO · supply condition
Steel CRNGO Cold Rolled
Properties of the Cold Rolled condition, compared with the other CRNGO tempers.
Pick when the lamination maker performs its own decarburizing/grain-growth anneal after punching to get lower loss and burr-free edges.
What is CRNGO Cold Rolled?
CRNGO Cold Rolled is CRNGO supplied in the Cold Rolled condition — pick when the lamination maker performs its own decarburizing/grain-growth anneal after punching to get lower loss and burr-free edges. CRNGO Cold Rolled has a yield strength of 500 MPa (72.5 ksi) and a tensile strength of 600 MPa (87 ksi) — stronger than 63% of steel grades. Elongation at break is 10% and the elastic modulus is 200 GPa (29 Msi). CRNGO Cold Rolled has a density of 7.65 g/cm³ (0.276 lb/in³), lighter than 97% of steel grades. It melts at 1,500°C (2,732 °F). Annealed is the default condition FabDigit quotes; Cold Rolled is available on request or by drawing note.
Limitations
- Limited service temperature — 200°C (392 °F), worse than 93% of steel grades
- Limited ductility — 10%, worse than 91% of steel grades
- Poor heat conductor — 25 W/m·K (14.4 BTU/hr·ft·°F), worse than 88% of steel grades
- Low electrical conductivity — 3.8 % IACS, worse than 84% of steel grades
- Hard to polish — 45/100, worse than 84% of steel grades
CRNGO Cold Rolled properties
Typical room-temperature values for CRNGO Cold Rolled — 9 properties are specific to this condition; the rest are grade-level values shared by every CRNGO temper. Each bar shows where the value sits among the steel grades in FabDigit's library — further right is higher.
Physical3
CRNGO Cold Rolled has a density of 7.65 g/cm³ (0.276 lb/in³), lighter than 97% of steel grades. It melts at 1,500°C (2,732 °F).
Mechanical12
CRNGO Cold Rolled has a yield strength of 500 MPa (72.5 ksi) and a tensile strength of 600 MPa (87 ksi) — stronger than 63% of steel grades. Elongation at break is 10% and the elastic modulus is 200 GPa (29 Msi).
Thermal6
CRNGO Cold Rolled is rated for continuous service to 200°C (392 °F). It conducts heat at 25 W/m·K (14.4 BTU/hr·ft·°F), worse than 88% of steel grades. Thermal expansion is 11.8 µm/m·K (6.56 µin/in·°F).
Electrical3
CRNGO Cold Rolled conducts electricity at 3.8 % IACS, worse than 84% of steel grades.
Chemical & Environmental3
Corrosion resistance is poor (15/100), better than 75% of steel grades.
Sustainability4
Producing a kilogram of CRNGO Cold Rolled takes about 32 MJ of energy and emits 2.3 kg of CO₂ — more than 70% of steel grades. Typical recycled content is 20%.
Manufacturability7
CRNGO Cold Rolled's machinability is fair (50/100, worse than 53% of steel grades); weldability fair (50/100); formability fair (35/100).
Values are nominal handbook figures for design screening. Certified mill or lot data ships with every FabDigit order on request.
Other CRNGO tempers and conditions
CRNGO is also supplied in 2 other conditions. The full side-by-side table is on the CRNGO overview.
- AnnealedDefaultStandard stocked condition: magnetic properties are final at the mill, laminations are punched and stacked with no further heat treatment.330 MPa yield · 78 HRB
- Cold RolledPick when the lamination maker performs its own decarburizing/grain-growth anneal after punching to get lower loss and burr-free edges.500 MPa yield · 95 HRB
Working with CRNGO Cold Rolled
Is CRNGO easy to machine?
Rarely machined; thin high-Si sheet is abrasive and burr-prone — use carbide, sharp tooling, and prefer punching, laser or EDM over milling.
Can CRNGO be welded?
TIG/laser welding of lamination stacks is possible but shorts laminations and raises local core loss; keep welds short and outside the flux path.
Can CRNGO be formed, bent or molded?
Optimised for high-speed progressive-die blanking with tight punch-die clearance (~5 % of thickness) and sharp tools; bending/drawing is limited at ≥2.5 % Si.
What surface finishes work on CRNGO?
Supplied with C-3/C-5 insulating coating — do not anodize; avoid grinding or pickling the coating, and stress-relief anneal (750–820 °C, neutral/H₂-N₂) after cutting if loss matters.
CRNGO 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 |
|---|---|---|
| Cvery low to avoid magnetic ageing | ≤ 0.01 | 0 |
| Sigrade-dependent; higher Si = lower loss, lower induction | 0.5 – 3.5 | 2.5 |
| Alraises resistivity, deoxidiser | 0.1 – 0.7 | 0.4 |
| Mn | 0.1 – 0.5 | 0.25 |
| Psometimes added for punchability | ≤ 0.05 | 0.02 |
| S | ≤ 0.01 | 0.01 |
| N | ≤ 0.01 | 0 |
| Tikept low; nitrides pin grains | ≤ 0.01 | 0 |
| Fe | balance | — |
CRNGO Cold Rolled — frequently asked
What is CRNGO Cold Rolled used for?
CRNGO Cold Rolled is typically used for motor stator and rotor laminations, generator cores, small transformer cores, reactor and ballast cores, traction motor lamination stacks and solenoid and relay cores. In short: cold-rolled non-oriented coil.
What is the yield strength of CRNGO Cold Rolled?
CRNGO Cold Rolled has a typical yield strength of 500 MPa (72.5 ksi) and a tensile strength of 600 MPa (87 ksi) — stronger than 63% of steel grades. Strength varies by condition: see the 3 listed tempers.
Is CRNGO Cold Rolled easy to machine?
Reasonably — machinability is rated fair (50/100, worse than 53% of steel grades). Rarely machined; thin high-Si sheet is abrasive and burr-prone — use carbide, sharp tooling, and prefer punching, laser or EDM over milling.
Can CRNGO Cold Rolled be welded?
With care — weldability is rated fair (50/100). TIG/laser welding of lamination stacks is possible but shorts laminations and raises local core loss; keep welds short and outside the flux path.
What surface finishes work on CRNGO Cold Rolled?
Supplied with C-3/C-5 insulating coating — do not anodize; avoid grinding or pickling the coating, and stress-relief anneal (750–820 °C, neutral/H₂-N₂) after cutting if loss matters.
Can CRNGO Cold Rolled be formed, bent or molded?
Optimised for high-speed progressive-die blanking with tight punch-die clearance (~5 % of thickness) and sharp tools; bending/drawing is limited at ≥2.5 % Si.
What is the maximum service temperature of CRNGO Cold Rolled?
CRNGO Cold Rolled 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 CRNGO Annealed and CRNGO-SRA?
Annealed is the default condition — standard stocked condition: magnetic properties are final at the mill, laminations are punched and stacked with no further heat treatment. SRA: use for punched/laser-cut cores where edge work-hardening has raised core loss; recovers most magnetic performance at slightly lower strength. Yield strength is 330 MPa in Annealed versus 300 MPa in SRA.
Can FabDigit make parts in CRNGO Cold Rolled?
Yes — CRNGO Cold Rolled is available for sheet metal with instant online pricing. Upload a STEP file to get a price and a DFM check.
Sources
- EN 10106 — Cold rolled non-oriented electrical steel strip and sheet delivered in the fully processed state — CEN (2015)
- EN 10341 — Cold rolled electrical non-alloy and alloy steel strip in the semi-processed state — CEN (2006)
- ASTM A677 — Nonoriented Electrical Steel Fully Processed Types — ASTM (2020)
- ASTM A683 — Nonoriented Electrical Steel Semiprocessed Types — ASTM (2019)
- ASTM A976 — Classification of Insulating Coatings for Electrical Steels — ASTM (2019)
- ASM Handbook Vol. 1 — Properties and Selection: Irons, Steels (magnetically soft materials) — ASM International (1990)
- Non-oriented electrical steel product data (M-series / 50W-series grades) — Baosteel / AK Steel / thyssenkrupp (2023)
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.