Steel SPCC · supply condition
Steel SPCC-CR
Properties of the CR condition, compared with the other SPCC tempers.
Default stocking condition: annealed and skin-passed cold-rolled coil/sheet for general stamping, brackets and enclosures.
What is SPCC-CR?
SPCC-CR is SPCC supplied in the CR condition — default stocking condition: annealed and skin-passed cold-rolled coil/sheet for general stamping, brackets and enclosures. SPCC-CR has a yield strength of 195 MPa (28.3 ksi) and a tensile strength of 310 MPa (45 ksi) — weaker than 99% of steel grades. Elongation at break is 38% and the elastic modulus is 205 GPa (29.7 Msi). SPCC-CR has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,495°C (2,723 °F). HR is the default condition FabDigit quotes; CR is available on request or by drawing note.
Advantages
- Ductile — tolerates forming and impact — 38%, better than 98% of steel grades
- High electrical conductivity — 11 % IACS, better than 98% of steel grades
- Forms and bends easily — 90/100, better than 98% of steel grades
- Readily welded — 95/100, better than 97% of steel grades
- Conducts heat well — 51 W/m·K (29.5 BTU/hr·ft·°F), better than 92% of steel grades
Limitations
- Hard to polish — 30/100, worse than 100% of steel grades
- Low strength — 195 MPa (28.3 ksi), worse than 99% of steel grades
SPCC-CR properties
Typical room-temperature values for SPCC-CR — 8 properties are specific to this condition; the rest are grade-level values shared by every SPCC temper. Each bar shows where the value sits among the steel grades in FabDigit's library — further right is higher.
Physical3
SPCC-CR has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,495°C (2,723 °F).
Mechanical15
SPCC-CR has a yield strength of 195 MPa (28.3 ksi) and a tensile strength of 310 MPa (45 ksi) — weaker than 99% of steel grades. Elongation at break is 38% and the elastic modulus is 205 GPa (29.7 Msi).
Thermal6
SPCC-CR is rated for continuous service to 350°C (662 °F). It conducts heat at 51 W/m·K (29.5 BTU/hr·ft·°F), better than 92% of steel grades. Thermal expansion is 12 µm/m·K (6.67 µin/in·°F).
Electrical3
SPCC-CR conducts electricity at 11 % IACS, better than 98% of steel grades.
Chemical & Environmental3
Corrosion resistance is not recommended (10/100), worse than 87% of steel grades.
Sustainability4
Producing a kilogram of SPCC-CR takes about 30 MJ of energy and emits 2.3 kg of CO₂ — more than 55% of steel grades. Typical recycled content is 25%.
Manufacturability7
SPCC-CR's machinability is good (60/100, better than 83% of steel grades); weldability excellent (95/100); formability excellent (90/100).
Values are nominal handbook figures for design screening. Certified mill or lot data ships with every FabDigit order on request.
Other SPCC tempers and conditions
SPCC is also supplied in 8 other conditions. The full side-by-side table is on the SPCC overview.
- HRDefaultUse for thicker, less critical parts where cold-rolled surface and tight tolerances are not needed; SPCC itself is a cold-rolled grade, so this is the SPHC/hot-rolled analogue.220 MPa yield · 55 HRB
- TinplateFood-can and decorative-can stock: bright, solderable, non-toxic tin layer over hard cold-rolled base; formability limited by the hard temper of the base strip.380 MPa yield · 72 HRB
- GalvanizedStandard choice when the part sees humidity or outdoor exposure without paint; zinc gives sacrificial protection but reduces weld electrode life and spatters.220 MPa yield · 52 HRB
- CRDefault stocking condition: annealed and skin-passed cold-rolled coil/sheet for general stamping, brackets and enclosures.195 MPa yield · 100 HB
Working with SPCC-CR
Is SPCC easy to machine?
Soft and gummy — use sharp positive-rake tools, high speed and coolant; expect heavy burrs on punched/drilled sheet, plan deburring.
Can SPCC be welded?
Excellent for resistance spot, MIG/MAG and laser welding with ER70S-6 class wire; no preheat needed, but remove zinc/tin coating and ventilate fumes on coated variants.
Can SPCC be formed, bent or molded?
Standard temper draws, bends and roll-forms readily (bend radius ~0.5–1×t for SD/A temper); use SPCCD/SPCCE for severe draws and watch stretcher strain in non-skin-passed sheet.
What surface finishes work on SPCC?
Bare SPCC must be protected: zinc phosphate + e-coat/powder paint, electro- or hot-dip zinc, tin, or Ni/Cr plating; oiled surface must be degreased before painting.
SPCC 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 |
|---|---|---|
| CJIS G3141 SPCC ladle analysis max | ≤ 0.15 | 0.06 |
| Mn | ≤ 0.6 | 0.3 |
| P | ≤ 0.1 | 0.02 |
| S | ≤ 0.05 | 0.02 |
| Altypical Al-killed deoxidation practice, not a JIS requirement | 0.02 – 0.07 | 0.04 |
| Fe | balance | — |
SPCC-CR — frequently asked
What is SPCC-CR used for?
SPCC-CR is typically used for sheet metal enclosures, PC and server chassis, appliance panels and covers, brackets and mounting plates, electrical cabinet doors and tinplate containers. In short: common commercial cold-rolled.
What is the yield strength of SPCC-CR?
SPCC-CR has a typical yield strength of 195 MPa (28.3 ksi) and a tensile strength of 310 MPa (45 ksi) — weaker than 99% of steel grades. Strength varies by condition: see the 9 listed tempers.
Is SPCC-CR easy to machine?
Reasonably — machinability is rated good (60/100, better than 83% of steel grades). Soft and gummy — use sharp positive-rake tools, high speed and coolant; expect heavy burrs on punched/drilled sheet, plan deburring.
Can SPCC-CR be welded?
Yes — weldability is rated excellent (95/100). Excellent for resistance spot, MIG/MAG and laser welding with ER70S-6 class wire; no preheat needed, but remove zinc/tin coating and ventilate fumes on coated variants.
What surface finishes work on SPCC-CR?
Bare SPCC must be protected: zinc phosphate + e-coat/powder paint, electro- or hot-dip zinc, tin, or Ni/Cr plating; oiled surface must be degreased before painting.
Can SPCC-CR be formed, bent or molded?
Standard temper draws, bends and roll-forms readily (bend radius ~0.5–1×t for SD/A temper); use SPCCD/SPCCE for severe draws and watch stretcher strain in non-skin-passed sheet.
What is the maximum service temperature of SPCC-CR?
SPCC-CR 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 SPCC-HR and SPCC-CR?
HR is the default condition — use for thicker, less critical parts where cold-rolled surface and tight tolerances are not needed; SPCC itself is a cold-rolled grade, so this is the SPHC/hot-rolled analogue. CR: default stocking condition: annealed and skin-passed cold-rolled coil/sheet for general stamping, brackets and enclosures. Yield strength is 220 MPa in HR versus 195 MPa in CR.
Can FabDigit make parts in SPCC-CR?
Yes — SPCC-CR is available for sheet metal with instant online pricing. Upload a STEP file to get a price and a DFM check.
Sources
- JIS G3141 — Cold-reduced carbon steel sheets and strip — JSA (2021)
- JIS G3302 — Hot-dip zinc-coated steel sheets and coils (SGCC) — JSA (2019)
- JIS G3303 — Tinplate and blackplate (SPTE) — JSA (2017)
- GB/T 5213 / GB/T 708 — SAC (2019)
- ASM Handbook Vol.1: Properties and Selection — Irons, Steels — ASM International (1990)
- Machinery's Handbook, 31st ed. (machinability ratings) — Industrial Press (2020)
- Cold-rolled coil datasheets (Nippon Steel / JFE / Baosteel SPCC) — mill datasheets (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.