Brian Fasteners provides Carbon Steel EN‑31 R‑100 Bars out of Houston—a high-carbon chrome oil-hardening steel known for having high hardness as well as wear resistance. EN‑31 (or R‑100) is applied to uses such as bearings, shafts, and tooling steel. Our bars are BS 970 and ASTM compliant and accompanied by full mill test certification. Through proper quality control and timely delivery, we offer EN‑31 bars suitable for tooling, bearing, and wear-critical industrial components.
EN‑31 has ~0.95–1.05% C, ~1.45–1.65% Cr, ~0.30–0.60% Mn, and traces of Si; the remainder Fe. Following oil hardening and tempering, tensile strength is up to 900–1100 MPa, with hardness to 62–65 HRC. Excellent wear and toughness after heat treatment is provided.
| Grades | EN 8, EN 19, EN 24, EN 31 |
| Dimensions | EN, DIN, JIS, ASTM, BS, ASME, AISI |
| Carbon Steel EN Series Round Bars | 3.0 – 50.8 mm, Over 50.8 – 300mm |
| Carbon Steel EN Series Rectangular Bars | 6.35 x 12.7mm,6.35 x 25.4mm,12.7 x 25.4mm |
| Carbon Steel EN Series Hex Bars | AF5.8mm–17mm |
| Carbon Steel EN Series Square Bars | AF2mm – 14mm, AF6.35mm,9.5mm,12.7mm, 15.98mm,19.0mm, 25.4mm |
| Carbon Steel EN Series Flat Bars | 1/2” to 10” in thickness range of 2mm to 150mm |
| Length | 1 to 6 Meters, Custom Cut Lengths |
| Finish | Bright, Polish & Black |
| Form | Round, Square, Hex (A/F), Rectangle, Wire (Coil Form), Wire-mesh, Billet, Ingot, Forging Etc. |
| Carbon | 0.95 / 1.10 |
| Manganese | 0.40 / 0.70 |
| Silicon | 0.10 / 0.35 |
| Sulfur | Max 0.050 |
| Phosphorus | Max 0.040 |
| Chromium | 1.20 – 1.60 |
| NAME OF MATERIAL | COMPOSITION IN % OF WEIGHT | THERMAL CONDUCTIVITY W/M-K | DENSITY KG/M^3 | MELTING POINT | |
| C | Mn Si Cr S P Mg | ||||
| En-31 IS-103 Crl | 1.5 | 0.52 0.22 1.3 0.05 0.05 – | 46.6 | 7810 | 1540 |
| BRITISH BS 970:1991 | 535A99 |
| BRITISH BS 970:1955 | EN31 |
| GERMAN DIN | 100CR6 |
| FRENCH AFNOR | 100C6 |
| SWEDISH SS | 2258 |
| AMERICAN SAE / AISI | 52100 |
They offer high hardness, excellent wear resistance, and durability, making them ideal for heavy-duty and high-performance applications.
They are commonly used in automotive, engineering, and tooling industries for components like gears, shafts, dies, and cutting tools.
Yes, we provide EN-31 R-100 Bars and Rods in various sizes and specifications tailored to meet specific application requirements.
For bearings, dies, shafts, punches, spindles, tool components, and gears. Where maximum hardness and resistance to wear are required. Also in valve spindles and precision instrumentation hardware. Brian Fasteners provides EN‑31 R‑100 bars tailored to material, size, and hardness requirements for precision toolmaking and industrial wear components.






We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
George Metals is a leading manufacturer, supplier, and exporter of high-quality bars, rods, and forgings, catering to various industries in Houston, USA
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