Steel S700MC
EN S700MC
S700MC (Q690M) is a thermomechanically rolled micro-alloyed HSLA sheet steel of the EN 10149-2 family, strengthened by controlled rolling and micro-alloying additions rather than by quenching and tempering.
Values for the TMCP condition
S700MC tempers and conditions
S700MC is supplied in 4 conditions, soft to hard. TMCP is the default FabDigit quotes; the values on this page are for it.
Compare all 4 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
TMCP, stress relieved after forming/welding | Only for large welded frames needing dimensional stability; keep below ~580 °C and short holds, since TMCP strength is permanently lost at higher temperatures. | 700 | 780 | 16 | 21 HRC | 8.5 % IACS |
TMCPDefault Thermomechanically controlled processed | Standard as-delivered hot-rolled TMCP coil/sheet/plate; the condition in which all EN 10149-2 properties are guaranteed. | 740 | 810 | 14 | 245 HB | — |
descaled coil/sheet surface | Choose when a clean, scale-free surface is needed for direct painting, laser cutting or close-tolerance cold forming; mechanical properties identical to as-rolled TMCP. | 740 | 810 | 14 | 23 HRC | 8 % IACS |
TMCP with low-temperature impact option | Producer-enhanced S700MC ordered with guaranteed Charpy energy at −40 °C for cold-climate cranes, trailers and mining equipment. | 760 | 820 | 15 | 24 HRC | 8 % IACS |
What is S700MC?
S700MC (Q690M) is a thermomechanically rolled micro-alloyed HSLA sheet steel of the EN 10149-2 family, strengthened by controlled rolling and micro-alloying additions rather than by quenching and tempering. It provides 740 MPa yield, 810 MPa tensile, 14 % elongation and about 245 HB, and is supplied as TMCP, pickled and oiled, low-temperature-tested or stress-relieved sheet for weight-critical welded structures. Trade-offs are limited elongation with high springback, machinability of 45 and no corrosion resistance; weldability is good at 85. Use S500MC or S355MC where forming demands are heavier. S700MC has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,460°C (2,660 °F). S700MC has a yield strength of 740 MPa (107 ksi) and a tensile strength of 810 MPa (117 ksi) — stronger than 83% of steel grades. Elongation at break is 14% and the elastic modulus is 210 GPa (30.5 Msi).
What is S700MC used for?
- Trailer chassis rails
- Mobile crane boom and outrigger parts
- Tipper and dump bodies
- Truck cross-members
- Lifting equipment brackets
- Concrete pump boom sections
- Agricultural implement frames
Advantages
- High strength — 740 MPa (107 ksi), better than 83% of steel grades
- Readily welded — 85/100, better than 83% of steel grades
- Forms and bends easily — 65/100, better than 81% of steel grades
Limitations
- Limited service temperature — 300°C (572 °F), worse than 78% of steel grades
- Limited ductility — 14%, worse than 75% of steel grades
S700MC properties
Typical room-temperature values for S700MC-TMCP; bars are the position among steel grades.
Physical3
S700MC has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,460°C (2,660 °F).
Mechanical17
S700MC has a yield strength of 740 MPa (107 ksi) and a tensile strength of 810 MPa (117 ksi) — stronger than 83% of steel grades. Elongation at break is 14% and the elastic modulus is 210 GPa (30.5 Msi).
Thermal6
S700MC is rated for continuous service to 300°C (572 °F). It conducts heat at 40 W/m·K (23.1 BTU/hr·ft·°F), worse than 64% of steel grades. Thermal expansion is 12 µm/m·K (6.67 µin/in·°F).
Electrical3
S700MC conducts electricity at 8 % IACS, better than 55% of steel grades.
Chemical & Environmental3
Corrosion resistance is not recommended (12/100), worse than 53% of steel grades.
Sustainability4
Producing a kilogram of S700MC takes about 25 MJ of energy and emits 2 kg of CO₂ — less than 82% of steel grades. Typical recycled content is 25%.
Manufacturability7
S700MC's machinability is fair (45/100, worse than 65% of steel grades); weldability excellent (85/100); formability good (65/100).
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. S700MC is highlighted; hover a dot for its name, or open the interactive family chart.
Working with S700MC
Is S700MC easy to machine?
Machines like a tough 250 HB HSLA steel — use coated carbide, rigid setups, moderate speeds and positive rake; drilling and tapping need reduced feeds versus mild steel.
Can S700MC be welded?
Very good weldability with low CEV (~0.40); use low-hydrogen consumables, control heat input (typically ≤1.5–2.0 kJ/mm) and interpass temperature to limit HAZ softening — matching or slightly undermatching filler is common.
Can S700MC be formed, bent or molded?
Designed for cold forming: bend transverse to rolling direction with a punch radius of about 1.5–2.5×t, allow for springback of 5–10° and avoid sheared-edge cracking by deburring or milling edges.
Manufacturability
The process limits FabDigit applies to S700MC. Every S700MC part is priced by an engineer; design inside these and the quote comes back without a redesign loop.
Sheet metal
| Formability | Better65 / 100 |
|---|---|
| Weldability | Excellent85 / 100 |
| Bendable | Yes |
S700MC 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 10149-2:2013 ladle analysis | ≤ 0.12 | 0.07 |
| Si | ≤ 0.6 | 0.2 |
| Mn | ≤ 2.1 | 1.8 |
| P | ≤ 0.03 | 0.01 |
| S | ≤ 0.02 | 0 |
| Altotal Al | ≥ 0.02 | 0.04 |
| NbNb+V+Ti ≤ 0.22 % | ≤ 0.09 | 0.05 |
| V | ≤ 0.2 | 0.05 |
| Ti | ≤ 0.22 | 0.1 |
| Mo | ≤ 0.5 | 0.15 |
| B | ≤ 0.01 | 0 |
| Fe | balance |
What surface finishes work on S700MC?
Shot-blast or pickle to remove mill scale, then zinc-rich primer/paint or powder coat; hot-dip galvanising is possible but the bath temperature slightly reduces yield strength.
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 S700MC in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- Similar grades
- Q690M
How much does S700MC cost?
S700MC is a standard-cost steel ($$), cheaper than about 61% 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.
S700MC — frequently asked
What is S700MC used for?
S700MC is typically used for trailer chassis rails, mobile crane boom and outrigger parts, tipper and dump bodies, truck cross-members, lifting equipment brackets and concrete pump boom sections. In short: high-strength TMCP plate.
What is the yield strength of S700MC?
S700MC has a typical yield strength of 740 MPa (107 ksi) and a tensile strength of 810 MPa (117 ksi) — stronger than 83% of steel grades. Strength varies by condition: see the 4 listed tempers.
Is S700MC easy to machine?
Reasonably — machinability is rated fair (45/100, worse than 65% of steel grades). Machines like a tough 250 HB HSLA steel — use coated carbide, rigid setups, moderate speeds and positive rake; drilling and tapping need reduced feeds versus mild steel.
Can S700MC be welded?
Yes — weldability is rated excellent (85/100). Very good weldability with low CEV (~0.40); use low-hydrogen consumables, control heat input (typically ≤1.5–2.0 kJ/mm) and interpass temperature to limit HAZ softening — matching or slightly undermatching filler is common.
What surface finishes work on S700MC?
Shot-blast or pickle to remove mill scale, then zinc-rich primer/paint or powder coat; hot-dip galvanising is possible but the bath temperature slightly reduces yield strength.
Can S700MC be formed, bent or molded?
Designed for cold forming: bend transverse to rolling direction with a punch radius of about 1.5–2.5×t, allow for springback of 5–10° and avoid sheared-edge cracking by deburring or milling edges.
What is the maximum service temperature of S700MC?
S700MC 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 S700MC TMCP and S700MC TMCP-SR?
TMCP is the default condition — standard as-delivered hot-rolled TMCP coil/sheet/plate; the condition in which all EN 10149-2 properties are guaranteed. TMCP-SR: only for large welded frames needing dimensional stability; keep below ~580 °C and short holds, since TMCP strength is permanently lost at higher temperatures. Yield strength is 740 MPa in TMCP versus 700 MPa in TMCP-SR.
How much does S700MC cost?
S700MC is a standard-cost steel ($$), cheaper than about 61% 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 S700MC?
Yes — S700MC is available for sheet metal; every part is priced by an engineer rather than instantly. Upload a STEP file to get a price and a DFM check.
Sources
- EN 10149-2 Hot rolled flat products made of high yield strength steels for cold forming — Part 2: Thermomechanically rolled steels — CEN (2013)
- Strenx 700MC / Domex 700MC data sheet — SSAB (2023)
- Optim 700 MC Plus data sheet — Ruukki/SSAB (2022)
- ASM Handbook Vol.1: Properties and Selection — Irons, Steels and High-Performance Alloys — ASM International (1990)
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.