Steel S355MC
EN S355MC
S355MC (Q355M equivalent) is a thermomechanically rolled micro-alloyed hot-rolled sheet and strip steel from the cold-forming MC family, with 400 MPa yield, 490 MPa tensile and 26 % elongation in the as-supplied M condition.
Reference datasheet — S355MC is not in the instant-quote catalog. Upload your part and an engineer will quote it in this grade or suggest the closest stocked equivalent.
Values for the M condition
S355MC tempers and conditions
S355MC is supplied in 5 conditions, soft to hard. M is the default FabDigit quotes; the values on this page are for it.
Compare all 5 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Stress relieved | Used after heavy welding or cold forming of thick sections to reduce residual stress and distortion; small strength loss. | 375 | 470 | 28 | 145 HB | 9 % IACS |
MDefault Thermomechanically controlled processed | Standard stocked condition for hot rolled coil, sheet and plate used in cold-formed structural and vehicle parts. | 400 | 490 | 26 | 150 HB | 9 % IACS |
M pickled and oiled | Choose when clean surface is needed for direct stamping, welding or painting without shot blasting. | 400 | 490 | 26 | 150 HB | 9 % IACS |
M slit / temper-levelled strip | Levelled narrow strip for roll forming and progressive-die work where flatness and camber control matter; slight yield increase from levelling. | 420 | 500 | 24 | 155 HB | 9 % IACS |
M cold formed / roll formed | Property state of the finished cold-formed profile: strength raised and ductility lowered locally at bends. | 480 | 540 | 15 | 175 HB | 9 % IACS |
What is S355MC?
S355MC (Q355M equivalent) is a thermomechanically rolled micro-alloyed hot-rolled sheet and strip steel from the cold-forming MC family, with 400 MPa yield, 490 MPa tensile and 26 % elongation in the as-supplied M condition. Engineers use it where a formed part must carry load: it bends and roll-forms well (formability score 82) and welds with a low carbon equivalent (weldability score 92), and it is stocked as coil, sheet, pickled-and-oiled and slit strip. It has no corrosion resistance and must be coated, and hot forming would remove the rolled-in strength. S420MC or S460MC are the next strength steps. S355MC has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,470°C (2,678 °F). S355MC has a yield strength of 400 MPa (58 ksi) and a tensile strength of 490 MPa (71.1 ksi) — weaker than 60% of steel grades. Elongation at break is 26% and the elastic modulus is 210 GPa (30.5 Msi).
What is S355MC used for?
- cold-formed structural parts
- wheel rims
- crane components
Advantages
- Forms and bends easily — 82/100, better than 94% of steel grades
- Readily welded — 92/100, better than 93% of steel grades
- Ductile — tolerates forming and impact — 26%, better than 82% of steel grades
Limitations
- Hard to polish — 45/100, worse than 84% of steel grades
S355MC properties
Typical room-temperature values for S355MC-M; bars are the position among steel grades.
Physical3
S355MC has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,470°C (2,678 °F).
Mechanical16
S355MC has a yield strength of 400 MPa (58 ksi) and a tensile strength of 490 MPa (71.1 ksi) — weaker than 60% of steel grades. Elongation at break is 26% and the elastic modulus is 210 GPa (30.5 Msi).
Thermal6
S355MC is rated for continuous service to 350°C (662 °F). It conducts heat at 45 W/m·K (26 BTU/hr·ft·°F), better than 66% of steel grades. Thermal expansion is 12 µm/m·K (6.67 µin/in·°F).
Electrical3
S355MC conducts electricity at 9 % IACS, better than 71% of steel grades.
Chemical & Environmental3
Corrosion resistance is not recommended (12/100), worse than 53% of steel grades.
Sustainability4
Producing a kilogram of S355MC takes about 25 MJ of energy and emits 2 kg of CO₂ — less than 82% of steel grades. Typical recycled content is 25%.
Manufacturability7
S355MC's machinability is good (60/100, better than 83% of steel grades); weldability excellent (92/100); formability very good (82/100).
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. S355MC is highlighted; hover a dot for its name, or open the interactive family chart.
Working with S355MC
Is S355MC easy to machine?
Machines like low-carbon HSLA sheet — sharp positive-rake tools and generous coolant to avoid gummy chips and burrs; deburr laser/plasma cut edges before forming.
Can S355MC be welded?
Excellent weldability with low CEV; MAG, SAW, laser and resistance welding all suitable, typically no preheat below ~25 mm, use low-hydrogen consumables and control heat input to preserve HAZ toughness.
Can S355MC be formed, bent or molded?
Designed for cold forming: bend transverse to rolling direction where possible, minimum inside radius roughly 1.0–1.5× thickness, and allow for springback of the high-yield sheet.
S355MC 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 |
|---|---|---|
| CEN 10149-2 ladle analysis | ≤ 0.12 | 0.08 |
| Si | ≤ 0.5 | 0.15 |
| Mn | ≤ 1.5 | 1.2 |
| P | ≤ 0.03 | 0.02 |
| S | ≤ 0.02 | 0.01 |
| Altotal Al, minimum | ≥ 0.02 | 0.04 |
| Nbmicro-alloying | ≤ 0.09 | 0.04 |
| Vmicro-alloying | ≤ 0.2 | 0.03 |
| Timicro-alloying | ≤ 0.15 | 0.02 |
| Fe | balance |
What surface finishes work on S355MC?
Not corrosion resistant — pickle or blast off mill scale, then phosphate + e-coat, powder paint, or hot-dip galvanize; oil coating for interim storage.
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).
Organic Coating
Black / Phosphate
Thermal Spray
Equivalent designations
Standards and trade names that resolve to Steel S355MC in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- Similar grades
- Q355M
How much does S355MC cost?
S355MC is a budget-cost steel ($), cheaper than about 90% 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.
S355MC — frequently asked
What is S355MC used for?
S355MC is typically used for cold-formed structural parts, wheel rims and crane components. In short: best-forming micro-alloyed sheet; highest weldability in family; entry-level MC strength.
What is the yield strength of S355MC?
S355MC has a typical yield strength of 400 MPa (58 ksi) and a tensile strength of 490 MPa (71.1 ksi) — weaker than 60% of steel grades. Strength varies by condition: see the 5 listed tempers.
Is S355MC easy to machine?
Reasonably — machinability is rated good (60/100, better than 83% of steel grades). Machines like low-carbon HSLA sheet — sharp positive-rake tools and generous coolant to avoid gummy chips and burrs; deburr laser/plasma cut edges before forming.
Can S355MC be welded?
Yes — weldability is rated excellent (92/100). Excellent weldability with low CEV; MAG, SAW, laser and resistance welding all suitable, typically no preheat below ~25 mm, use low-hydrogen consumables and control heat input to preserve HAZ toughness.
What surface finishes work on S355MC?
Not corrosion resistant — pickle or blast off mill scale, then phosphate + e-coat, powder paint, or hot-dip galvanize; oil coating for interim storage.
Can S355MC be formed, bent or molded?
Designed for cold forming: bend transverse to rolling direction where possible, minimum inside radius roughly 1.0–1.5× thickness, and allow for springback of the high-yield sheet.
What is the maximum service temperature of S355MC?
S355MC 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 S355MC-M and S355MC M-CF?
M is the default condition — standard stocked condition for hot rolled coil, sheet and plate used in cold-formed structural and vehicle parts. M-CF: property state of the finished cold-formed profile: strength raised and ductility lowered locally at bends. Yield strength is 400 MPa in M versus 480 MPa in M-CF.
How much does S355MC cost?
S355MC is a budget-cost steel ($), cheaper than about 90% 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.
Sources
- EN 10149-2 — Hot rolled flat products made of high yield strength steels for cold forming: thermomechanically rolled steels — CEN (2013)
- GB/T 1591 — High strength low alloy structural steels (Q355M) — SAC (2018)
- ASM Handbook Vol.1 — Properties and Selection: Irons, Steels, and High-Performance Alloys — ASM International (1990)
- ASM Handbook Vol.19 — Fatigue and Fracture — ASM International (1996)
- Hot rolled structural steels for cold forming (S315MC–S700MC) product data — SSAB / voestalpine / Baosteel (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.