Steel SPHD · supply condition
Steel SPHD-CR
Properties of the CR condition, compared with the other SPHD tempers.
Choose when the part needs thin gauge, tight thickness tolerance and a bright smooth surface for visible deep-drawn shells.
What is SPHD-CR?
SPHD-CR is SPHD supplied in the CR condition — choose when the part needs thin gauge, tight thickness tolerance and a bright smooth surface for visible deep-drawn shells. SPHD-CR has a yield strength of 200 MPa (29 ksi) and a tensile strength of 300 MPa (43.5 ksi) — weaker than 98% of steel grades. Elongation at break is 40% and the elastic modulus is 205 GPa (29.7 Msi). SPHD-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 — 40%, better than 99% of steel grades
- Forms and bends easily — 94/100, better than 99% of steel grades
- High electrical conductivity — 10.8 % IACS, better than 94% of steel grades
- Readily welded — 92/100, better than 93% of steel grades
- Conducts heat well — 51 W/m·K (29.5 BTU/hr·ft·°F), better than 92% of steel grades
Limitations
- Low strength — 200 MPa (29 ksi), worse than 98% of steel grades
SPHD-CR properties
Typical room-temperature values for SPHD-CR — 8 properties are specific to this condition; the rest are grade-level values shared by every SPHD temper. Each bar shows where the value sits among the steel grades in FabDigit's library — further right is higher.
Physical3
SPHD-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
SPHD-CR has a yield strength of 200 MPa (29 ksi) and a tensile strength of 300 MPa (43.5 ksi) — weaker than 98% of steel grades. Elongation at break is 40% and the elastic modulus is 205 GPa (29.7 Msi).
Thermal6
SPHD-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
SPHD-CR conducts electricity at 10.8 % IACS, better than 94% of steel grades.
Chemical & Environmental3
Corrosion resistance is not recommended (12/100), worse than 53% of steel grades.
Sustainability4
Producing a kilogram of SPHD-CR takes about 25 MJ of energy and emits 2.2 kg of CO₂ — less than 82% of steel grades. Typical recycled content is 25%.
Manufacturability7
SPHD-CR's machinability is good (55/100, better than 62% of steel grades); weldability excellent (92/100); formability excellent (94/100).
Values are nominal handbook figures for design screening. Certified mill or lot data ships with every FabDigit order on request.
Other SPHD tempers and conditions
SPHD is also supplied in 3 other conditions. The full side-by-side table is on the SPHD overview.
- HRDefaultDefault mill supply for drawn or stamped parts where the black oxide scale is acceptable or will be removed downstream.230 MPa yield · 100 HB
- GalvanizedUse where the drawn part sees humidity or outdoor exposure and painting alone is not enough; expect slightly reduced draw depth and no welding without fume control.240 MPa yield · 102 HB
- CRChoose when the part needs thin gauge, tight thickness tolerance and a bright smooth surface for visible deep-drawn shells.200 MPa yield · 92 HB
Working with SPHD-CR
Is SPHD easy to machine?
Very soft and gummy — use sharp positive-rake tools, high speed and generous coolant to avoid burrs and built-up edge; punching and laser/plasma cutting are preferred over milling.
Can SPHD be welded?
Excellent weldability by resistance spot, MAG, TIG and laser with no preheat (CE ≈ 0.10–0.15); remove mill scale or zinc coating locally and ventilate for galvanized stock.
Can SPHD be formed, bent or molded?
Drawing-quality grade: deep-draws, stretch-flanges and roll-forms readily; watch strain-rate sensitivity, stretcher strains after long storage (age from free N) and use good drawing lubricant.
What surface finishes work on SPHD?
No corrosion resistance bare — phosphate + e-coat/powder, zinc plate or hot-dip galvanize; pickled surface accepts paint directly, black hot-rolled scale must be blasted or pickled first.
SPHD 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 3131 SPHD ladle analysis | ≤ 0.1 | 0.06 |
| Mn | ≤ 0.5 | 0.3 |
| P | ≤ 0.03 | 0.02 |
| S | ≤ 0.04 | 0.01 |
| Sinot specified by JIS; mills keep low for drawability | ≤ 0.05 | 0.02 |
| Altypical Al-killed practice, not a JIS requirement | 0.02 – 0.07 | 0.04 |
| Fe | balance | — |
SPHD-CR — frequently asked
What is SPHD-CR used for?
SPHD-CR is typically used for drawn enclosures and housings, truck body and cab panels, pressed chassis brackets and reinforcements, appliance shells, oil pans and fluid reservoirs and HVAC duct and plenum sections. In short: deep-drawing hot-rolled sheet.
What is the yield strength of SPHD-CR?
SPHD-CR has a typical yield strength of 200 MPa (29 ksi) and a tensile strength of 300 MPa (43.5 ksi) — weaker than 98% of steel grades. Strength varies by condition: see the 4 listed tempers.
Is SPHD-CR easy to machine?
Reasonably — machinability is rated good (55/100, better than 62% of steel grades). Very soft and gummy — use sharp positive-rake tools, high speed and generous coolant to avoid burrs and built-up edge; punching and laser/plasma cutting are preferred over milling.
Can SPHD-CR be welded?
Yes — weldability is rated excellent (92/100). Excellent weldability by resistance spot, MAG, TIG and laser with no preheat (CE ≈ 0.10–0.15); remove mill scale or zinc coating locally and ventilate for galvanized stock.
What surface finishes work on SPHD-CR?
No corrosion resistance bare — phosphate + e-coat/powder, zinc plate or hot-dip galvanize; pickled surface accepts paint directly, black hot-rolled scale must be blasted or pickled first.
Can SPHD-CR be formed, bent or molded?
Drawing-quality grade: deep-draws, stretch-flanges and roll-forms readily; watch strain-rate sensitivity, stretcher strains after long storage (age from free N) and use good drawing lubricant.
What is the maximum service temperature of SPHD-CR?
SPHD-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 SPHD-HR and SPHD-CR?
HR is the default condition — default mill supply for drawn or stamped parts where the black oxide scale is acceptable or will be removed downstream. CR: choose when the part needs thin gauge, tight thickness tolerance and a bright smooth surface for visible deep-drawn shells. Yield strength is 230 MPa in HR versus 200 MPa in CR.
Can FabDigit make parts in SPHD-CR?
Yes — SPHD-CR is available for sheet metal with instant online pricing. Upload a STEP file to get a price and a DFM check.
Sources
- JIS G 3131 — Hot-rolled mild steel plates, sheets and strip — Japanese Standards Association (2018)
- GB/T 912 / GB/T 3274 — Hot-rolled carbon structural and drawing steel sheet — SAC (2017)
- ASTM A1011/A1011M — Steel Sheet and Strip, Hot-Rolled, CS/DS grades — ASTM (2018)
- ASM Handbook Vol.1 — Properties and Selection: Irons, Steels — ASM International (1990)
- Machinery's Handbook, 31st ed. (machinability ratings) — Industrial Press (2020)
- Hot-rolled pickled and galvanized coil datasheets (Nippon Steel / Baosteel) — mill datasheets (2022)
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.