AISI H21 / T20821 Chromium-Tungsten Base Tool Steel
| Product parameters | |
| Material Technical Standards:: | ASTM A681 - 2004 |
| Place of Origin: | P. R. China |
| Terms of Price:: | Ex works, CIF, and CFR |
| Melting Process Route:: | BEF + VD + ESR |
| Min. order quantity Per Batch:: | 3300 KG |
| Mode of transportation:: | Air Cargo, Sea shipment or International Express |
| Product Shapes:: | Round bar, Flat bar, Plate |
| Production Lead Time:: | Within 75 days after 40% downpayment. |
| Unified Social Credit Code:: | 91510871777942750J |
| 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%).
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.
100% Ultrasonic test ASTM E2375 /SAE AMS 2154 /SEP 1923 /GB/T 4162 /EN 10228-3.
Bars are usually supplied black/bright in the annealed condition.
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%).
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.
100% Ultrasonic test ASTM E2375 /SAE AMS 2154 /SEP 1923 /GB/T 4162 /EN 10228-3.
Bars are usually supplied black/bright in the annealed condition.
| C (％) | 0.30 ～ 0.40 |
| Si(％) | 0.15 ～ 0.50 |
| Mn(％) | 0.10 ～ 0.40 |
| P(％) | ≤ 0.030 |
| S (％) | ≤ 0.030 |
| Cr (％) | 3.00 ～ 3.75 |
| Ni (％) | - |
| Mo(％) | - |
| Other (％) | W 8.75 ~ 10.0 V 0.30 ～ 0.50 |
| 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 max |
| Products Forms and Dimensions: Round bar (Diameter): 5.50 ~ 550mm Square bar / Flat bar: 10 ~ 600mm Wire rod (Diameter): 1.0 ~ 12mm Forging piece: Different shapes based on OEM |
