Project Description
Equivalent Grades of E235 Across International Standards
E235 has close equivalents in major national and international standards, facilitating cross-regional procurement and specification interchange. The table below lists comparable grades with their governing standards.
| Standard | Grade | Remarks |
|---|---|---|
| DIN | St37-2 | Obsolete; superseded by EN standards |
| ASTM | A36 / A283 Gr. C | Structural carbon steel; verify for tube form |
| JIS | SS400 | JIS G3101 general structural steel |
| GOST | St3sp | GOST 380 common carbon steel |
| ISO | Fe360B | ISO 630 structural steel |
| BS | S235JR | BS EN 10025-2; replaces Grade 43A |
While these grades share similar tensile and yield characteristics, direct substitution should always be verified against specific application requirements. FUSHUN METAL provides full mill certificates to confirm actual chemical and mechanical properties against ordered specifications.
Typical Applications of E235 Seamless Tubes
Thanks to its reliable yield strength, excellent weldability, and consistent dimensional accuracy, E235 seamless tubes fulfill demanding mechanical and structural roles across multiple industries. FUSHUN METAL supplies E235 tubing to global customers for the following downstream component applications:
Hydraulic cylinder tubes, shock absorber sleeves, steering column shafts, suspension bushings, axle tubes
Bearing housings, conveyor rollers, precision bushings, spacer sleeves, mechanical tubing for rotating shafts
Machine frames, structural hollow sections, handrails, furniture frames, heat exchanger shells
Scaffolding tubes, structural columns, bracing members, piling casings, temporary works
Low-pressure water pipelines, gas distribution lines, compressed air systems, oil transfer pipes
Spring-action components, cold-formed tubular parts, drawn cups, telescopic assemblies
E235 Tube Supply — Dimensions and Manufacturing Methods
FUSHUN METAL supplies EN 10297-1 E235 seamless tubes across three manufacturing routes, enabling a wide dimensional envelope to cover diverse engineering requirements. With over 15 years of steel supply experience, the company sources from ISO 9001 and AS9120B-certified production lines and performs incoming dimensional verification and surface inspection on every batch. The standard available size ranges are:
| Process | Outside Diameter (mm) | Wall Thickness (mm) | Typical Length (m) |
|---|---|---|---|
| Hot-Rolled Seamless | 17.2 – 660.0 | 2.0 – 75.0 | 4.0 – 12.0 |
| Cold-Rolled Seamless | 10.0 – 127.0 | 0.5 – 12.0 | 5.8 – 11.0 |
| Cold-Drawn Seamless | 6.0 – 219.1 | 0.5 – 25.0 | 5.8 – 16.0 |
Dimensional tolerances per EN 10297-1: OD ±1% or ±0.5 mm (whichever is greater); WT tolerance varies by wall-thickness-to-OD ratio. Surface condition: black (hot-rolled), pickled & oiled, or bright (cold-drawn/cold-rolled).
E235 Chemical Composition per EN 10297-1
The ladle analysis limits for E235 (1.0308) are defined in EN 10297-1. This chemistry ensures a clean, weldable carbon steel with good hot and cold workability. FUSHUN METAL verifies each heat through optical emission spectrometry (OES) as part of its incoming quality control protocol, ensuring every delivery lot conforms to specification before release.
| Element | C | Si | Mn | P | S |
|---|---|---|---|---|---|
| Max (%) | 0.17 | 0.35 | 1.20 | 0.030 | 0.035 |
Low carbon content (≤0.17%) ensures excellent weldability without preheating for wall thicknesses up to 25 mm. The controlled phosphorus and sulfur levels contribute to good surface quality and formability.
E235 Mechanical Properties — Normalized (+N) Condition
The standard delivery condition per EN 10297-1 is normalized (+N), achieved by heating to 890–920 °C followed by controlled air cooling to refine grain structure and homogenize mechanical properties. FUSHUN METAL validates yield strength, tensile strength, and elongation through routine tensile testing on every test unit, with EN 10204 Type 3.1 certification issued for every shipment.
| Property | Wall Thickness ≤16 mm | 16 < t ≤ 40 mm |
|---|---|---|
| Yield Strength ReH (MPa, min) | 235 | 225 |
| Tensile Strength Rm (MPa) | 360 – 500 | 360 – 500 |
| Elongation A5 (%, min) | 25 | 23 |
| Hardness (HBW, approx.) | 100 – 130 | |
Optional heat treatments available on request include full annealing (880–910 °C, furnace-cooled) for improved machinability and stress relieving (550–650 °C) for post-weld dimensional stability. Impact testing can be performed per customer specification.
E235 Seamless Tube Additional Product Data
Seamless process only (hot-finished, cold-drawn, or cold-rolled), as mandated by EN 10297-1. Normalized (+N) is the standard delivery condition. FUSHUN METAL ensures full compliance with EN 10297-1 manufacturing requirements through its ISO 9001 and AS9120B audited supply chain, with every production lot traceable to its originating mill heat number.
Mandatory tests per EN 10297-1: ladle analysis, room-temperature tensile test, flattening test, dimensional inspection, and visual surface examination. EN 10204 Type 3.1 inspection certificate with full chemical and mechanical results accompanies every shipment. Optional supplementary tests: impact test (Charpy V-notch), hardness test (HBW), eddy current per EN 10893-2, and NDT such as ultrasonic testing for critical applications.
Excellent arc weldability with all common processes including MIG/MAG, TIG, and MMA (stick) welding. No preheat required for wall thickness ≤25 mm; thicker sections benefit from 100–150 °C preheat. Good cold formability suitable for bending, flaring, swaging, and expansion operations. Post-weld stress relief at 550–650 °C is recommended for heavy-wall sections to restore dimensional stability.
Surface finishes: black (as-rolled), pickled and oiled, or bright (cold-finished). Corrosion protection options include shop-applied varnish, hot-dip galvanizing, or epoxy/polyurethane paint systems on request. Standard packing: hexagonal bundled stacks secured with steel strapping, plastic end caps for thin-walled tubes, and weatherproof wrapping for ocean freight. Custom bundling and crate packaging are available for non-standard lengths or premium surface finishes requiring additional handling protection.