Common size on stock, Special sizes needs new production.Can cut to Size, Cut to Shape.
EMERSONMETAL
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We offer competitive, market-responsive pricing on both standard and heavy-wall seamless 4145 tubing, with mill-direct sourcing and flexible quantity breaks. Whether you require raw hollow bar for machining into drill collars, precision-honed hydraulic cylinder tubing, or thick-wall structural pipe for heavy tooling, our pricing structure reflects real-time alloy surcharges, mill efficiencies, and volume commitments rather than inflated distributor markups.
| Parameter | Details |
| Steel Grade | AISI 4145 / 4145H / SAE 4145 (Modified) |
| Standards | ASTM A519, API 7-1, ASTM A29, EN 10297-1 |
| Outer Diameter | 50mm – 350mm (hot finished seamless); 20mm – 150mm (cold drawn) |
| Wall Thickness | 5mm – 80mm (heavy wall configurations available) |
| Length | 3m – 12.5m (random or fixed); cut-to-length service available |
| Delivery Condition | Hot Rolled / Cold Drawn / Normalized / Quenched & Tempered (Q+T) |
| Surface Finish | Black / Pickled / Oiled / Rough Turned / Honed |
| End Preparation | Plain Ends / Beveled (30° or 45°) / Threaded & Coupled |
| Element / Property | AISI 4145 | 4145H (H-Grade) |
| C | 0.43 – 0.48% | 0.43 – 0.48% |
| Cr | 0.80 – 1.10% | 0.80 – 1.10% |
| Mo | 0.15 – 0.25% | 0.15 – 0.25% |
| Mn | 0.75 – 1.00% | 0.75 – 1.00% |
| Yield Strength | ≥550 MPa (Q+T) | ≥550 MPa (Q+T) |
| Tensile Strength | 750 – 950 MPa (Q+T) | 750 – 950 MPa (Q+T) |
| Q+T | 240 – 300 HB | 240 – 300 HB |
