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Eternal
A2 tool steel is produced according to the ASTM A681-24 standard, with UNS number T30102. It is an air-hardening, medium-alloy cold work tool steel. This steel offers high hardness, good wear resistance, and good toughness. It is widely used for blanking dies, forming dies, shear blades, and precision gauges.
Jiangyin Eternal Heavy Industry Co., Ltd. is a professional forging company. They strictly follow ASTM A681-24 for full quality control. They can supply A2 steel in various delivery conditions, including hot forged, hot rolled, cold drawn, and ground finishes.
Element | Content(wt%) | Description |
C | 0.95 ~ 1.05 | Ensure high hardness and wear resistance after quenching |
Si | 0.10 ~ 0.50 | Decarburizing agent, enhances hardenability |
Mn | 0.40 ~ 1.00 | Improve hardenability to enhance strength and hardenability |
P | ≤ 0.030 | Harmful elements, strictly controlled |
S | ≤ 0.030 | Harmful elements, strictly controlled |
Cr | 4.75 ~ 5.50 | Improve hardenability, wear resistance and corrosion resistance |
Mo | 0.90 ~ 1.40 | Refine the grains and enhance the toughness |
V | 0.15 ~ 0.50 | Refine the crystal grains to enhance the wear resistance and toughness |
 | Standard | Grade |
ISO | 100MnCrW4 | |
GB | Cr5Mo1V | |
JIS | SKD12 | |
DIN | 1.2363（X100CrMoV5-1） | |
EN | 1.2363（X100CrMoV5-1） | |
AISI | A2 | |
BS | BA2 | |
UNI | X100CrMoV51KU | |
SS | 2260 | |
AFNOR | Z100CDV5 |
Supply condition hardness
Condition | Hardness | Standard |
Soft Annealed(+A) | HBW ≤ 248 | ASTM A681-24 |
Quenching and tempering hardness
Item | Standard |
austenitizing temperature | 790 ℃ |
quenching medium | Air |
temper temperature | 204 ℃ |
Quenching and tempering hardness | HRC ≥ 60 |
Electric arc furnace (EAF) + LF refining + VD vacuum degassing. For high-end requirements, electroslag remelting (ESR) can be adopted to enhance purity.
The initial forging temperature is 1100℃, and the final forging temperature is 900℃.
The annealing process is generally spherical annealing. Usually, the steel is heated to 820-870℃ and then slowly cooled to obtain a uniform spherical pearlite structure.
Our goal is to work closely with partners to help customers achieve greater success in multiple fields.
Each heat of steel is analyzed before pouring to make sure the chemical composition meets ASTM A681-24 Table 1. Product analysis reports can be provided if the customer asks for them.
The product is checked in the annealed condition using macroscopic examination (according to Practice A561). This ensures there are no harmful defects like too much porosity, segregation, non‑metallic inclusions, pipe, cracks, etc.
Annealed hardness: not more than 248 HBW
Hardness after quenching and tempering: not less than 57 HRC
Ultrasonic inspection (Supplementary Requirement S1)
Inclusion rating (according to Test Methods E45, Supplementary Requirement S2)
Froduct form | Size | surface state |
forged round bar | Diameter 200-1500mm | as-forged condition or rough manchined |
Forged billet | within 20 tons | as-forged condition or rough manchined |
Forged step shaft | Customized according to OEM requirements | as-forged condition or rough manchined |
Forged disk | Diameter 200-1500mm | as-forged condition or rough manchined |
Forged tube | Max OD 1500mm | as-forged condition or rough manchined |
Forging special-shaped parts | Customized according to OEM requirements | as-forged condition or rough manchined |
Very low price range (about ¥1 – ¥15/kg, roughly $0.14 – $2.08/kg):
These prices are often not typical – they may be special promotions, eye‑catching quotes, or errors. For example, one quote showed 15 yuan per ton, which is very unusual. Normal retail prices are around 15 yuan/kg (about $2.08/kg).
Common retail price (about ¥19 – ¥36/kg, roughly $2.64 – $5.00/kg):
This is the usual range for retail or small‑quantity purchases. Many suppliers quote in this range.
Branded and high‑end products (about ¥55 – ¥78/kg and above, roughly $7.64 – $10.83/kg and above):
Well‑known brands (like US Finkl or Swedish ASSAB) or specially processed products (such as ground or forged finishes) cost significantly more. For example, Finkl A2 was quoted at 78 yuan/kg (about $10.83/kg), and some high‑end products were quoted at 55 yuan/kg (about $7.64/kg).
A2 tool steel is widely used for many applications because of its good air-hardening properties, good wear resistance, and excellent toughness. Typical uses include:
Blanking dies and punching dies
Cold extrusion dies and forming dies
Shear blades and thread rolling dies
Precision gauges and inspection fixtures
Thermosetting plastic molds
Cold and hot trimming dies
