Steel E355
EN E355
E355 (1.0580 / 1.0920, EN 10305-1; related to S355K2 and Q355) is a medium-carbon non-alloy engineering steel used mainly for cold-drawn precision tube that needs higher mechanical strength than low-carbon grades.
Values for the CD condition
E355 tempers and conditions
E355 is supplied in 7 conditions, soft to hard. CD is the default FabDigit quotes; the values on this page are for it.
Compare all 7 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Solution annealed | Softest condition — choose for heavy cold forming, bending, flaring or deep upsetting of the tube/bar before final heat treatment. | 290 | 460 | 28 | 135 HB | — |
Hot rolled | Cheapest form for heavy-wall structural tube and bar where dimensional precision and surface finish are not critical. | 380 | 560 | 22 | 160 HB | — |
Normalized | Pick when uniform fine-grain structure, guaranteed 355 MPa yield and -20 °C impact toughness are required (pressure and structural service). | 380 | 550 | 24 | 155 HB | — |
Cold drawn, soft (lightly cold worked after annealing) | Precision cold-drawn dimensions with retained ductility — for tubes that will still be bent or flanged after drawing. | 400 | 540 | 14 | 165 HB | — |
CDDefault Cold drawn | Default stocked condition: cold-drawn precision tube/bar with tight tolerance and good surface, used for hydraulic cylinders and structural tubing. | 490 | 650 | 10 | 190 HB | — |
Stress relieved | Standard hydraulic-cylinder tube condition: cold-drawn accuracy with residual stress removed so the tube stays straight after machining or honing. | 490 | 620 | 12 | 185 HB | — |
Cold drawn hard (as-drawn, no heat treatment) | Highest strength/hardness and best surface, but low ductility and high residual stress — avoid where machining-induced distortion matters. | 620 | 700 | 6 | 210 HB | — |
Supply forms, finishes and certifications
Ways E355 is supplied — form, process route, surface or paperwork — without a datasheet of their own. The property values above apply.
| Option | What it is | Type |
|---|---|---|
SRB | Skived and roller-burnished honed cylinder tube | Surface finish |
What is E355?
E355 (1.0580 / 1.0920, EN 10305-1; related to S355K2 and Q355) is a medium-carbon non-alloy engineering steel used mainly for cold-drawn precision tube that needs higher mechanical strength than low-carbon grades. It is stocked hot-rolled, cold-drawn, normalized, annealed, stress-relieved and in hard-drawn (+C) form for hydraulic cylinder tube, piston rods and welded structures; the default condition lists 490 MPa yield, 650 MPa tensile, 10 % elongation and 190 HB. It has no inherent corrosion resistance, and hard-drawn +C tube retains only 4–6 % elongation, so specify +A or +LC material where cold forming follows. E355 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). E355 has a yield strength of 490 MPa (71.1 ksi) and a tensile strength of 650 MPa (94.3 ksi) — stronger than 61% of steel grades. Elongation at break is 10% and the elastic modulus is 210 GPa (30.5 Msi).
What is E355 used for?
- Hydraulic cylinder tube
- Piston and hydraulic rods
- Crane jibs and telescopic booms
- Industrial structures and frames
- Pneumatic cylinder barrels
- Roller and axle tube
- Agricultural machinery tubing
Advantages
- Readily welded — 72/100, better than 75% of steel grades
Limitations
- Limited ductility — 10%, worse than 91% of steel grades
- Low fracture toughness — 60 MPa·√m (54.6 ksi·√in), worse than 78% of steel grades
E355 properties
Typical room-temperature values for E355-CD; bars are the position among steel grades.
Physical3
E355 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).
Mechanical16
E355 has a yield strength of 490 MPa (71.1 ksi) and a tensile strength of 650 MPa (94.3 ksi) — stronger than 61% of steel grades. Elongation at break is 10% and the elastic modulus is 210 GPa (30.5 Msi).
Thermal6
E355 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
E355 conducts electricity at 8.6 % IACS, better than 66% of steel grades.
Chemical & Environmental3
Corrosion resistance is not recommended (10/100), worse than 86% of steel grades.
Sustainability4
Producing a kilogram of E355 takes about 25 MJ of energy and emits 2 kg of CO₂ — less than 82% of steel grades. Typical recycled content is 25%.
Manufacturability6
E355's machinability is good (58/100, better than 75% of steel grades); weldability very good (72/100); formability fair (40/100).
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. E355 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with E355
Is E355 easy to machine?
Machines like a 0.2 %C C-Mn steel (~60 % of 1212); cold-drawn +C/+SR chips break better than annealed stock, use carbide at 150–220 m/min with coolant and expect some spring-back/distortion when heavy stock is removed from +C tube.
Can E355 be welded?
Readily welded by MAG/SAW/TIG with G3Si1/ER70S-6 class filler; CEV ≈ 0.40–0.45 so preheat 100–150 °C for wall thicknesses above ~30 mm or in restrained joints, and re-normalize if full toughness is needed.
Can E355 be formed, bent or molded?
+A and +LC bend, flare and expand well (bend radius ≥ 2×D); +C hard-drawn tube has only 4–6 % elongation and should be stress relieved or annealed before cold forming; hot forming at 850–1050 °C followed by normalizing.
Manufacturability
The process limits FabDigit applies to E355. Every E355 part is priced by an engineer; design inside these and the quote comes back without a redesign loop.
CNC machining
| Machinability | Better58 / 100 |
|---|---|
| ISO material group | P.2 |
| Cutting speed (rough / finish) | 180 / 210 m/min |
| Minimum wall | 0.8 mm |
| Minimum internal radius | 1 mm |
| Drill depth limit | 5× diameter |
| Best surface (machined / polished) | Ra 1.6 / — |
| Hardenable after machining | No |
Sheet metal
| Formability | Fair40 / 100 |
|---|---|
| Weldability | Better72 / 100 |
| Bendable | Yes |
E355 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 |
|---|---|---|
| Ccast analysis, EN 10305-1 | ≤ 0.22 | 0.18 |
| Si | ≤ 0.55 | 0.25 |
| Mn | ≤ 1.6 | 1.3 |
| P | ≤ 0.03 | 0.02 |
| S | ≤ 0.03 | 0.01 |
| Altotal Al for fine-grain/killed practice, when specified | ≥ 0.02 | 0.03 |
| Fe | balance |
What surface finishes work on E355?
No inherent corrosion resistance — specify phosphate + oil, zinc plating, paint or hard-chrome/CrN on piston rods; ID of cylinder tube is roller-burnished or honed to Ra 0.2–0.4 µm; it takes nitriding and induction hardening only modestly due to low carbon.
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
CVD Coating
Black / Phosphate
Thermal Spray
Equivalent designations
Standards and trade names that resolve to Steel E355 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- EN / DIN / Werkstoff-Nr.
- 1.058010305-11.0920S355K2
- Similar grades
- Q355
How much does E355 cost?
E355 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.
E355 — frequently asked
What is E355 used for?
E355 is typically used for hydraulic cylinder tube, piston and hydraulic rods, crane jibs and telescopic booms, industrial structures and frames, pneumatic cylinder barrels and roller and axle tube. In short: precision hydraulic tube.
What is the yield strength of E355?
E355 has a typical yield strength of 490 MPa (71.1 ksi) and a tensile strength of 650 MPa (94.3 ksi) — stronger than 61% of steel grades. Strength varies by condition: see the 7 listed tempers.
Is E355 easy to machine?
Reasonably — machinability is rated good (58/100, better than 75% of steel grades). Machines like a 0.2 %C C-Mn steel (~60 % of 1212); cold-drawn +C/+SR chips break better than annealed stock, use carbide at 150–220 m/min with coolant and expect some spring-back/distortion when heavy stock is removed from +C tube.
Can E355 be welded?
Yes — weldability is rated very good (72/100). Readily welded by MAG/SAW/TIG with G3Si1/ER70S-6 class filler; CEV ≈ 0.40–0.45 so preheat 100–150 °C for wall thicknesses above ~30 mm or in restrained joints, and re-normalize if full toughness is needed.
What surface finishes work on E355?
No inherent corrosion resistance — specify phosphate + oil, zinc plating, paint or hard-chrome/CrN on piston rods; ID of cylinder tube is roller-burnished or honed to Ra 0.2–0.4 µm; it takes nitriding and induction hardening only modestly due to low carbon.
Can E355 be formed, bent or molded?
+A and +LC bend, flare and expand well (bend radius ≥ 2×D); +C hard-drawn tube has only 4–6 % elongation and should be stress relieved or annealed before cold forming; hot forming at 850–1050 °C followed by normalizing.
What is the maximum service temperature of E355?
E355 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 E355-CD and E355-A?
CD is the default condition — default stocked condition: cold-drawn precision tube/bar with tight tolerance and good surface, used for hydraulic cylinders and structural tubing. A: softest condition — choose for heavy cold forming, bending, flaring or deep upsetting of the tube/bar before final heat treatment. Yield strength is 490 MPa in CD versus 290 MPa in A.
How much does E355 cost?
E355 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 E355?
Yes — E355 is available for CNC machining and 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 10305-1 Steel tubes for precision applications — Seamless cold drawn tubes — CEN (2016)
- EN 10297-1 Seamless circular steel tubes for mechanical and general engineering purposes — CEN (2003)
- EN 10027-2 Designation systems for steels — Numerical system (1.0580) — CEN (2015)
- ASM Handbook Vol.1 — Properties and Selection: Irons, Steels and High-Performance Alloys — ASM International (1990)
- Machinery's Handbook, 31st ed. (machinability and hardness conversion) — Industrial Press (2020)
- Hydraulic cylinder tube (E355 +SR / SRB) product data — European seamless tube producers (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.