Steel SPCC FullHard
Supply condition
JIS SPCC
Maximum strength and flatness, essentially no formability — used for flat parts, shims, slit strip and substrate for further processing.
Values for the FullHard condition
Other SPCC tempers and conditions
SPCC is listed in 7 conditions; see the grade overview at SPCC.
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 |
FullHardThis page 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 |
What is SPCC FullHard?
SPCC FullHard is SPCC supplied in the FullHard condition — maximum strength and flatness, essentially no formability — used for flat parts, shims, slit strip and substrate for further processing. SPCC FullHard has a yield strength of 550 MPa (79.8 ksi) and a tensile strength of 600 MPa (87 ksi) — stronger than 71% of steel grades. Elongation at break is 3% and the elastic modulus is 205 GPa (29.7 Msi). SPCC FullHard 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; FullHard is available on request or by drawing note.
Advantages
- High electrical conductivity — 10.5 % IACS, better than 89% of steel grades
- Conducts heat well — 50 W/m·K (28.9 BTU/hr·ft·°F), better than 87% of steel grades
- Readily welded — 80/100, better than 79% of steel grades
Limitations
- Hard to polish — 30/100, worse than 100% of steel grades
- Limited ductility — 3%, worse than 99% of steel grades
- Limited service temperature — 200°C (392 °F), worse than 93% of steel grades
- Limited formability — 12/100, worse than 92% of steel grades
SPCC FullHard properties
Typical room-temperature values for SPCC FullHard; 23 are specific to this condition. Other listed values are SPCC reference data and may not represent this condition. Bars are the position among steel grades.
Physical3
SPCC FullHard 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 FullHard has a yield strength of 550 MPa (79.8 ksi) and a tensile strength of 600 MPa (87 ksi) — stronger than 71% of steel grades. Elongation at break is 3% and the elastic modulus is 205 GPa (29.7 Msi).
Thermal6
SPCC FullHard is rated for continuous service to 200°C (392 °F). It conducts heat at 50 W/m·K (28.9 BTU/hr·ft·°F), better than 87% of steel grades. Thermal expansion is 12 µm/m·K (6.67 µin/in·°F).
Electrical3
SPCC FullHard conducts electricity at 10.5 % IACS, better than 89% of steel grades.
Chemical & Environmental3
Corrosion resistance is not recommended (10/100), worse than 86% of steel grades.
Sustainability4
Producing a kilogram of SPCC FullHard 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 FullHard's machinability is good (55/100, better than 62% of steel grades); weldability very good (80/100); formability not recommended (12/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with SPCC FullHard
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 FullHard — frequently asked
What is SPCC FullHard used for?
SPCC FullHard 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 FullHard?
SPCC FullHard has a typical yield strength of 550 MPa (79.8 ksi) and a tensile strength of 600 MPa (87 ksi) — stronger than 71% of steel grades. Strength varies by condition: see the 7 listed tempers.
Is SPCC FullHard easy to machine?
Reasonably — machinability is rated good (55/100, better than 62% 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 FullHard be welded?
Yes — weldability is rated very good (80/100). 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 FullHard?
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 FullHard 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 FullHard?
SPCC FullHard 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 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 FullHard?
Yes — SPCC FullHard 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.