Steel SPCC
JIS SPCC
SPCC is the JIS G3141 designation for general-purpose (commercial quality) cold-rolled low-carbon steel sheet and coil, the highest-volume stamping and enclosure sheet in Asia.
Values for the HR condition
SPCC tempers and conditions
SPCC is supplied in 7 conditions, soft to hard. HR is the default FabDigit quotes; the values on this page are for it.
Compare all 7 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
SPCC-A, fully soft (dead soft) cold rolled sheet | Pick for the deepest draws and most severe bending, where a slightly rougher surface and risk of stretcher strain are acceptable. | 175 | 295 | 42 | 90 HB | 11.5 % IACS |
Cold rolled | Default stocking condition: annealed and skin-passed cold-rolled coil/sheet for general stamping, brackets and enclosures. | 195 | 310 | 38 | 100 HB | 11 % IACS |
HRDefault Hot rolled | 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. | 220 | 320 | 33 | 110 HB | 11 % IACS |
SPCC-8, one-eighth hard | Slight stiffness increase with most formability retained; used for flat panels that must resist oil-canning. | 260 | 350 | 26 | 108 HB | 11 % IACS |
Quarter hard | Choose when moderate springiness and higher yield are needed with simple bends only. | 330 | 420 | 16 | 130 HB | 10.5 % IACS |
Half hard | Stiff sheet for flat springs, clips and roll-formed sections; bending only along limited radii and preferably across the rolling direction. | 430 | 500 | 8 | 155 HB | 10 % IACS |
SPCC-1, full hard (as cold rolled, not annealed) | Maximum strength and flatness, essentially no formability — used for flat parts, shims, slit strip and substrate for further processing. | 550 | 600 | 3 | 11 HRC | 10.5 % IACS |
Supply forms, finishes and certifications
Ways SPCC is supplied — form, process route, surface or paperwork — without a datasheet of their own. The property values above apply.
| Option | What it is | Type |
|---|---|---|
Tinplate | Electrolytic tin coated low-carbon sheet | Surface finish |
Galvanized | Hot-dip zinc coated cold rolled sheet | Coating |
What is SPCC?
SPCC is the JIS G3141 designation for general-purpose (commercial quality) cold-rolled low-carbon steel sheet and coil, the highest-volume stamping and enclosure sheet in Asia. It is chosen for very low cost, excellent cold formability and weldability, and a smooth, paint-ready surface; supplied in annealed/skin-passed 'standard temper' as well as 1/8H–full-hard tempers. Its limits are almost no corrosion resistance when bare (must be zinc-coated, tinned, phosphated or painted), modest strength, and no guaranteed mechanical properties in the base SPCC grade (use SPCCT/SPCCD when tested values or deep-drawing quality are required). SPCC 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). SPCC has a yield strength of 220 MPa (31.9 ksi) and a tensile strength of 320 MPa (46.4 ksi) — weaker than 98% of steel grades. Elongation at break is 33% and the elastic modulus is 205 GPa (29.7 Msi).
What is SPCC used for?
- Sheet metal enclosures
- PC and server chassis
- Appliance panels and covers
- Brackets and mounting plates
- Electrical cabinet doors
- Tinplate containers
- Automotive interior stampings
Advantages
- High electrical conductivity — 11 % IACS, better than 98% of steel grades
- Readily welded — 95/100, better than 97% of steel grades
- Ductile — tolerates forming and impact — 33%, better than 96% of steel grades
- Conducts heat well — 51 W/m·K (29.5 BTU/hr·ft·°F), better than 92% of steel grades
- Forms and bends easily — 75/100, better than 90% of steel grades
Limitations
- Hard to polish — 30/100, worse than 100% of steel grades
- Low strength — 220 MPa (31.9 ksi), worse than 98% of steel grades
SPCC properties
Typical room-temperature values for SPCC-HR; bars are the position among steel grades.
Physical3
SPCC 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).
Mechanical16
SPCC has a yield strength of 220 MPa (31.9 ksi) and a tensile strength of 320 MPa (46.4 ksi) — weaker than 98% of steel grades. Elongation at break is 33% and the elastic modulus is 205 GPa (29.7 Msi).
Thermal6
SPCC 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 conducts electricity at 11 % IACS, better than 98% of steel grades.
Chemical & Environmental3
Corrosion resistance is not recommended (8/100), worse than 99% of steel grades.
Sustainability4
Producing a kilogram of SPCC takes about 30 MJ of energy and emits 2.3 kg of CO₂ — more than 56% of steel grades. Typical recycled content is 25%.
Manufacturability7
SPCC's machinability is good (62/100, better than 89% of steel grades); weldability excellent (95/100); formability very good (75/100).
Common Calculations5
Values are nominal handbook figures for design screening. Certified mill or lot data ships with every FabDigit order on request.
Strength versus weight in the steel family
Yield strength against density for every steel grade FabDigit runs. SPCC is highlighted; hover a dot for its name, or open the interactive family chart.
Working with SPCC
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.
Manufacturability
The process limits FabDigit's quote engine applies to SPCC. Design inside these and the part quotes instantly; outside them it routes to an engineer.
Sheet metal
| Formability | Better75 / 100 |
|---|---|
| Weldability | Better95 / 100 |
| Bendable | No |
| Minimum bend radius | 1× thickness |
| Sheet thickness range | 0.5 – 3 mm |
| Spring-back | Moderate |
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 |
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.
Surface treatments FabDigit runs on steel parts — pick them in the quote configurator or call them out on the drawing. Each links to its datasheet in the surface-finish library (thickness, specs, call-out, material verdicts).
Plating
Black / Phosphate
Thermal Spray
Equivalent designations
Standards and trade names that resolve to Steel SPCC in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- JIS
- A1008
- Trade names
- cold rolled sheet SPCC
How much does SPCC cost?
SPCC is a budget-cost steel ($), cheaper than about 100% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
SPCC — frequently asked
What is SPCC used for?
SPCC 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?
SPCC has a typical yield strength of 220 MPa (31.9 ksi) and a tensile strength of 320 MPa (46.4 ksi) — weaker than 98% of steel grades. Strength varies by condition: see the 7 listed tempers.
Is SPCC easy to machine?
Reasonably — machinability is rated good (62/100, better than 89% 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 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?
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 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?
SPCC 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.
How much does SPCC cost?
SPCC is a budget-cost steel ($), cheaper than about 100% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
Can FabDigit make parts in SPCC?
Yes — SPCC 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; hardness values on non-Brinell scales are converted approximately for charting only. Manufacturability limits are FabDigit quote-engine defaults and may be relaxed by engineering review. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.