Steel SPCE-A (Solution annealed)
Temper
EN DC05
Softest condition, lowest yield strength; choose when maximum drawability matters and stretcher-strain (Lüders) marks on the part surface are acceptable or removed by later forming.
Values for the A condition
Other SPCE tempers and conditions
SPCE is listed in 3 conditions; see the grade overview at SPCE.
Compare all 3 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
AThis page Solution annealed | Softest condition, lowest yield strength; choose when maximum drawability matters and stretcher-strain (Lüders) marks on the part surface are acceptable or removed by later forming. | 140 | 285 | 44 | 85 HB | 11 % IACS |
Non-ageing extra deep drawing quality | Ti/Nb-stabilised or specially processed non-ageing version; specify when parts are formed months after delivery and stretcher strains / yield-point return must be guaranteed absent (typically warranted 6 months). | 150 | 290 | 44 | 87 HB | 11 % IACS |
SDefault Standard temper | Default stocked condition: fully annealed then temper-rolled to suppress yield-point elongation and set surface roughness for deep drawing. | 155 | 295 | 42 | 90 HB | 11 % IACS |
What is SPCE-A?
SPCE-A is SPCE in the A temper — softest condition, lowest yield strength; choose when maximum drawability matters and stretcher-strain (Lüders) marks on the part surface are acceptable or removed by later forming. SPCE-A has a yield strength of 140 MPa (20.3 ksi) and a tensile strength of 285 MPa (41.3 ksi) — weaker than 100% of steel grades. Elongation at break is 44% and the elastic modulus is 205 GPa (29.7 Msi). SPCE-A has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,500°C (2,732 °F). S is the default condition FabDigit quotes; A is available on request or by drawing note.
Advantages
- Ductile — tolerates forming and impact — 44%, better than 100% of steel grades
- Forms and bends easily — 99/100, better than 100% of steel grades
- Conducts heat well — 55 W/m·K (31.8 BTU/hr·ft·°F), better than 99% of steel grades
- High electrical conductivity — 11 % IACS, better than 98% of steel grades
- Readily welded — 95/100, better than 97% of steel grades
Limitations
- Low strength — 140 MPa (20.3 ksi), worse than 100% of steel grades
- Limited service temperature — 300°C (572 °F), worse than 78% of steel grades
SPCE-A properties
Typical room-temperature values for SPCE-A; 19 are specific to this condition. Other listed values are SPCE reference data and may not represent this condition. Bars are the position among steel grades.
Physical3
SPCE-A has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,500°C (2,732 °F).
Mechanical15
SPCE-A has a yield strength of 140 MPa (20.3 ksi) and a tensile strength of 285 MPa (41.3 ksi) — weaker than 100% of steel grades. Elongation at break is 44% and the elastic modulus is 205 GPa (29.7 Msi).
Thermal6
SPCE-A is rated for continuous service to 300°C (572 °F). It conducts heat at 55 W/m·K (31.8 BTU/hr·ft·°F), better than 99% of steel grades. Thermal expansion is 12.2 µm/m·K (6.78 µin/in·°F).
Electrical3
SPCE-A conducts electricity at 11 % IACS, better than 98% of steel grades.
Chemical & Environmental3
Corrosion resistance is not recommended (10/100), worse than 86% of steel grades.
Sustainability4
Producing a kilogram of SPCE-A 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
SPCE-A's machinability is fair (46/100, worse than 59% of steel grades); weldability excellent (95/100); formability excellent (99/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with SPCE-A
Is SPCE easy to machine?
Rarely machined; soft ferrite is gummy — use sharp positive-rake tools, high speed and coolant, expect burrs on punched/blanked edges.
Can SPCE be welded?
Excellent for resistance spot, projection, laser and MIG welding thanks to very low carbon; no preheat or PWHT needed.
Can SPCE be formed, bent or molded?
Designed for the most severe deep draws (r ≈ 1.8–2.2, n ≈ 0.22): use matched-die draws with proper blank-holder force and drawing oil; use SPCEN if storage before forming exceeds a few months to avoid stretcher strains.
What surface finishes work on SPCE?
Must be protected — zinc or Zn-Ni electroplating, hot-dip galvanizing, zinc-phosphate + e-coat/powder paint; surface is well suited to Class-A painted panels.
SPCE 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 G 3141 SPCE ≤0.08 (EN DC05 ≤0.06) | ≤ 0.08 | 0.04 |
| MnEN DC05 ≤0.35 | ≤ 0.4 | 0.22 |
| PEN DC05 ≤0.025 | ≤ 0.03 | 0.02 |
| SEN DC05 ≤0.025 | ≤ 0.03 | 0.01 |
| AlAl-killed; SPCEN may add Ti/Nb for non-ageing | ≥ 0.02 | 0.04 |
| Fe | balance | — |
SPCE-A — frequently asked
What is SPCE-A used for?
SPCE-A is typically used for complex drawn parts, automotive body panels and sink basins. In short: extra-deep-drawing JIS grade; DC05 equivalent; class-A paintable surface.
What is the yield strength of SPCE-A?
SPCE-A has a typical yield strength of 140 MPa (20.3 ksi) and a tensile strength of 285 MPa (41.3 ksi) — weaker than 100% of steel grades. Strength varies by condition: see the 3 listed tempers.
Is SPCE-A easy to machine?
Reasonably — machinability is rated fair (46/100, worse than 59% of steel grades). Rarely machined; soft ferrite is gummy — use sharp positive-rake tools, high speed and coolant, expect burrs on punched/blanked edges.
Can SPCE-A be welded?
Yes — weldability is rated excellent (95/100). Excellent for resistance spot, projection, laser and MIG welding thanks to very low carbon; no preheat or PWHT needed.
What surface finishes work on SPCE-A?
Must be protected — zinc or Zn-Ni electroplating, hot-dip galvanizing, zinc-phosphate + e-coat/powder paint; surface is well suited to Class-A painted panels.
Can SPCE-A be formed, bent or molded?
Designed for the most severe deep draws (r ≈ 1.8–2.2, n ≈ 0.22): use matched-die draws with proper blank-holder force and drawing oil; use SPCEN if storage before forming exceeds a few months to avoid stretcher strains.
What is the maximum service temperature of SPCE-A?
SPCE-A is rated for continuous use to about 300°C (572 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between SPCE-S and SPCE-A?
S is the default condition — default stocked condition: fully annealed then temper-rolled to suppress yield-point elongation and set surface roughness for deep drawing. A: softest condition, lowest yield strength; choose when maximum drawability matters and stretcher-strain (Lüders) marks on the part surface are acceptable or removed by later forming. Yield strength is 155 MPa in S versus 140 MPa in A.
Sources
- JIS G 3141 Cold-reduced carbon steel sheets and strip — JISC (2021)
- EN 10130 Cold rolled low carbon steel flat products for cold forming (DC01–DC06) — CEN (2006)
- ASM Handbook Vol.1 — Properties and Selection: Irons, Steels — ASM International (1990)
- Cold-rolled EDDQ sheet product data (Baosteel / NSC / POSCO) — 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.