Steel E315
EN E315
E315 is a non-alloy low-carbon steel to EN 10305 (1.0236) used for higher-strength cold-sized and welded precision tube in general mechanical and structural work.
Reference datasheet — E315 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 +N condition
E315 tempers and conditions
E315 is supplied in 6 conditions, soft to hard. +N is the default FabDigit quotes; the values on this page are for it.
Compare all 6 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Annealed | Choose for maximum cold formability — deep bending, flaring, expanding or subsequent forming operations. | 290 | 460 | 28 | 135 HB | 10 % IACS |
Hot rolled | Lowest-cost option for non-critical structural tube where only nominal mechanical properties are needed. | 330 | 510 | 22 | 150 HB | 10 % IACS |
+NDefault Normalized | Default delivery condition when the specified ReH ≥ 315 MPa with good ductility and toughness is required. | 350 | 520 | 24 | 155 HB | — |
Lightly cold worked after final heat treatment | Use when tight dimensional tolerance is needed but the tube must still bend, flare or expand. | 400 | 550 | 14 | 170 HB | 10 % IACS |
Stress relieved | Compromise condition: keeps most of the cold-work strength while removing residual stress for dimensional stability after machining. | 440 | 550 | 13 | 175 HB | 10 % IACS |
Cold drawn | Pick for maximum strength, close tolerances and good surface on precision tube where low elongation and residual stress are acceptable. | 520 | 620 | 8 | 190 HB | — |
What is E315?
E315 is a non-alloy low-carbon steel to EN 10305 (1.0236) used for higher-strength cold-sized and welded precision tube in general mechanical and structural work. It reaches about 350 MPa yield, 520 MPa tensile, 24 % elongation and 155 HB while keeping good weldability (score 88), and is available in +N, +C, +LC, +A, +SR and +AR. In the +C condition springback and residual stress are high, and the bare surface has no corrosion resistance. E275 is the softer, more formable alternative in the same tube family. E315 has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,425°C (2,597 °F). E315 has a yield strength of 350 MPa (50.8 ksi) and a tensile strength of 520 MPa (75.4 ksi) — weaker than 74% of steel grades. Elongation at break is 24% and the elastic modulus is 210 GPa (30.5 Msi).
What is E315 used for?
- precision steel tubing
- high-strength hydraulic tubes
- chassis and frame tubing
- machine parts
Advantages
- Easy to machine — 62/100, better than 89% of steel grades
- Forms and bends easily — 72/100, better than 88% of steel grades
- Conducts heat well — 50 W/m·K (28.9 BTU/hr·ft·°F), better than 87% of steel grades
- Readily welded — 88/100, better than 87% of steel grades
- High electrical conductivity — 10 % IACS, better than 83% of steel grades
E315 properties
Typical room-temperature values for E315-+N; bars are the position among steel grades.
Physical3
E315 has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,425°C (2,597 °F).
Mechanical16
E315 has a yield strength of 350 MPa (50.8 ksi) and a tensile strength of 520 MPa (75.4 ksi) — weaker than 74% of steel grades. Elongation at break is 24% and the elastic modulus is 210 GPa (30.5 Msi).
Thermal6
E315 is rated for continuous service to 350°C (662 °F). It conducts heat at 50 W/m·K (28.9 BTU/hr·ft·°F), better than 87% of steel grades. Thermal expansion is 12.2 µm/m·K (6.78 µin/in·°F).
Electrical3
E315 conducts electricity at 10 % IACS, better than 83% of steel grades.
Chemical & Environmental3
Corrosion resistance is not recommended (10/100), worse than 86% of steel grades.
Sustainability4
Producing a kilogram of E315 takes about 25 MJ of energy and emits 2.1 kg of CO₂ — less than 82% of steel grades. Typical recycled content is 30%.
Manufacturability8
E315's machinability is good (62/100, better than 89% of steel grades); weldability excellent (88/100); formability very good (72/100).
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. E315 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with E315
Is E315 easy to machine?
Machines like 1020/1025 — use sharp HSS or coated carbide, moderate speeds and good chip control; gummy in the +A condition, best surface finish in +C or +SR.
Can E315 be welded?
Excellent weldability by MAG, TIG, resistance and laser with low CEV; no preheat needed on thin walls, use low-hydrogen consumables and consider stress relief after heavy welding of +C tube.
Can E315 be formed, bent or molded?
Cold bend, flare, expand and roll-form readily in +A or +N; in +C reduce bend radius expectations and allow for high springback and residual stress.
E315 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 |
|---|---|---|
| Cladle analysis, non-alloy quality steel | ≤ 0.2 | 0.17 |
| Si | ≤ 0.35 | 0.25 |
| Mnmain strengthening addition for the 315 MPa yield class | ≤ 1.4 | 1.1 |
| P | ≤ 0.03 | 0.02 |
| S | ≤ 0.03 | 0.02 |
| Nunless Al-fixed nitrogen | ≤ 0.01 | 0.01 |
| Febalance, plus residual Cu/Cr/Ni | balance |
What surface finishes work on E315?
Not anodizable — protect by zinc plating/galvanizing, phosphating plus oil, e-coat or paint; can be hard-chrome plated or honed for hydraulic cylinder tube.
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 E315 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- EN / DIN / Werkstoff-Nr.
- 1.0236
How much does E315 cost?
E315 is a budget-cost steel ($), cheaper than about 90% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
E315 — frequently asked
What is E315 used for?
E315 is typically used for precision steel tubing, high-strength hydraulic tubes, chassis and frame tubing and machine parts. In short: strongest E-series tube grade; weldable at 350 MPa yield; suits hydraulic tube duty.
What is the yield strength of E315?
E315 has a typical yield strength of 350 MPa (50.8 ksi) and a tensile strength of 520 MPa (75.4 ksi) — weaker than 74% of steel grades. Strength varies by condition: see the 6 listed tempers.
Is E315 easy to machine?
Reasonably — machinability is rated good (62/100, better than 89% of steel grades). Machines like 1020/1025 — use sharp HSS or coated carbide, moderate speeds and good chip control; gummy in the +A condition, best surface finish in +C or +SR.
Can E315 be welded?
Yes — weldability is rated excellent (88/100). Excellent weldability by MAG, TIG, resistance and laser with low CEV; no preheat needed on thin walls, use low-hydrogen consumables and consider stress relief after heavy welding of +C tube.
What surface finishes work on E315?
Not anodizable — protect by zinc plating/galvanizing, phosphating plus oil, e-coat or paint; can be hard-chrome plated or honed for hydraulic cylinder tube.
Can E315 be formed, bent or molded?
Cold bend, flare, expand and roll-form readily in +A or +N; in +C reduce bend radius expectations and allow for high springback and residual stress.
What is the maximum service temperature of E315?
E315 is rated for continuous use to about 350°C (662 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
How much does E315 cost?
E315 is a budget-cost steel ($), 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 10305-1/-2/-3 Steel tubes for precision applications — CEN (2016)
- EN 10297-1 Seamless circular steel tubes for mechanical and general engineering purposes — CEN (2003)
- EN 10296-1 Welded circular steel tubes for mechanical and general engineering purposes — CEN (2003)
- ASM Handbook Vol.1 — Properties and Selection: Irons, Steels and High-Performance Alloys — ASM International (1990)
- EN ISO 18265 Metallic materials — Conversion of hardness values — CEN/ISO (2013)
- worldsteel LCI data for steel products — World Steel Association (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.