T30108 - AISI A8 Chromium-Molybdenum-Tungsten Steel
| Product parameters | |
| Material Category:: | 5.0Cr-1.4Mo-1.25W Series Tool Steel |
| Material Technical Standards:: | ASTM A681 - 2004 |
| Place of Origin: | P. R. China |
| Product Shapes:: | Round bar, Flat bar, Hollow bar, Plate, and Forgings. |
| Surface Condition:: | Peeled - Rough turned - Shot blasted - Bright surface. |
| Production Lead Time:: | Within 55 days after 40% downpayment. |
| Company ISO Register No:: | UQ211218R0 |
Description
Tool steel is to fabricate the cutting tool, measuring implement, mould, and wear-resisting tool, it possesses higher hardness and keeps maintaining the high hardness and redhardness under high temperature, and more abrasive resistance, proper toughness. Tool steel is commontly divided into carbon tool steel, alloy tool steel, high speed steel.
Alloy tool steel is one type of steel adds the alloying elements in the carbon tool steel, such as Si, Mn, Ni, Cr, W, Mo, V. Adding the elements (Cr, Mn) can improve the hardenability of tool steel. Or adding other alloying elements meanwhile (the gross is not more than 5%).
Alloy tool steel is widely used to produce the cutting tool, cold/heat distortion mould and measuring implement. and further to manufacture the piston, valve, valve seat of fuel pump of engine.
The alloy is usually produced by BEF & AOD followed by electroslag remelting (ESR) / VAR if necessary for special purpose.
Bars and, where applicable, forgings are subjected to ultrasonic examination based on the different levels according to the buyers' requirements. Bars are usually supplied black/bright in the annealed condition.
| C (％) | 0.50 ～ 0.06 |
| Si(％) | 0.75 ~ 1.10 |
| Mn(％) | ≤ 0.50 |
| P(％) | ≤ 0.030 |
| S (％) | ≤ 0.030 |
| Cr (％) | 4.75～ 5.50 |
| Ni (％) | - |
| Mo(％) | 1.15 ~ 1.65 |
| Other (％) | W 1.00 ~ 1.50 |
| Condition of heat treatment | annealing |
| Tensile Rm (MPa) | - |
| Yield Rp0.2 (MPa) | - |
| Elongation A (%) | - |
| Reduction in cross section on fracture Z (%) | - |
| Impact AKV/AKU (J) | - |
| Brinell Hardness (HBW) | 235 ～ 262 |
Round bar (Diameter): 5.50 ~ 650mm Square bar / Flat bar: 3 ~ 650mm Wire rod (Diameter): 0.10 ~ 16mm Steel strip via cold rolled: T0.1 - 3mm X W5 - 650mm X L (or in coil form) Forging piece: Different shapes based on OEM |
