EN8.
EN8 is a medium-carbon steel, 080M40 under BS 970, and one of the most used general engineering grades in India.
Can’t find your grade? Send it — we’ll source it.
Our stockist and mill sourcing network extends beyond the grades listed here. Send rare grades, unusual forms and small-quantity requirements for sourcing review.
One enquiry gives us the details to check suitable sources across the network and help move your purchase forward. Share the exact grade, standard, form, size, quantity, delivery town and required date. We’ll confirm availability, minimum order quantity and lead time against your requirement.
Mill test certificate (EN 10204 3.1) supplied with material; third-party inspection on request.
Quick details
| Material grade | EN8 (UNS G10400 (AISI 1040, nearest)) |
|---|---|
| Forms | Round bars |
| Usage / application | Shafts and axles, Studs, bolts and pins, Gears and couplings |
| Test certificate | Mill test certificate (EN 10204 3.1) supplied with material; third-party inspection on request. |
| Business type | Stockist and supplier |
| Location | 231/235, Sant Sena Maharaja Marg, Mumbai, Maharashtra 400004, India |
Also searched as: EN8, 1040 (nearest), UNS G10400 (AISI 1040, nearest), W.Nr 1.0503 (C45, nearest), 080M40 (BS 970)
Product information for purchasing teams
EN8 is a medium-carbon steel, 080M40 under BS 970, and one of the most used general engineering grades in India. It machines well, can be flame or induction hardened, and is used for shafts, axles, bolts, gears and studs where mild steel is not strong enough.
Exact specification, availability and commercial details are confirmed against your enquiry.
Product forms and standards
| Form | Standard |
|---|---|
| Round bars | BS 970 080M40 (EN8), bright or black |
Related designation references
| Grade | UNS | Werkstoff Nr. | EN / BS | JIS |
|---|---|---|---|---|
| EN8 | G10400 (AISI 1040, nearest) | 1.0503 (C45, nearest) | 080M40 (BS 970) | S40C (nearest) |
Cross-standard references are not automatic substitutes. Confirm the exact product form, specification, composition, class and condition before accepting a substitution.
Chemical composition, %
| Grade | C | Si | Mn | P | S |
|---|---|---|---|---|---|
| EN8 | 0.36 – 0.44 | 0.10 – 0.40 | 0.60 – 1.00 | ≤ 0.050 | ≤ 0.050 |
Mechanical properties
| Property | Value |
|---|---|
| Tensile strength, normalised | About 550 – 700 MPa |
| Yield strength, normalised | About 280 MPa and above |
Values per BS 970 080M40. Mechanical values depend on section size and condition (normalised or hardened and tempered).. Confirm against the current edition of the standard and your purchase specification.
Density: 7.85 g/cm³
Applications
- Shafts and axles
- Studs, bolts and pins
- Gears and couplings
- General machined parts
Questions buyers ask
What is EN8 equivalent to?
EN8 is close to C45 / 1.0503 in EN 10083 and to AISI 1040. The equivalents are similar but not identical, so confirm with your drawing before substituting.
What are the equivalent grades of EN8?
EN8 is UNS G10400 (AISI 1040, nearest), Werkstoff 1.0503 (C45, nearest), EN 080M40 (BS 970) and JIS S40C (nearest). Cross-standard references are not automatic substitutes; verify the product form, standard, composition and condition.
In which forms is EN8 available?
Round bars to BS 970 080M40 (EN8), bright or black.
What is the density of EN8?
About 7.85 g/cm³ (7,850 kg/m³).
Where is Steel Impex India located?
Steel Impex India is at 231/235, Sant Sena Maharaja Marg, Mumbai, Maharashtra 400004, India We supply across India.