Basic Info.
Standard
AISI, ASTM, DIN, JIS, GB, BS
Composition
Stainless Steel Scrap
Special Use
High-strength Steel Plate, Wear Resistant Steel, Mold Steel
Application
Tool Steel Bar
Trademark
An steel, Bao steel, Wu steel
Product Description
What is A2 Steel?
A2 is the most common grade of steel bar used to make tools for shaping metal, wood, and other materials. A2 medium-carbon chromium alloy steel is a member of the cold work tool steel group, designated by the American Iron and Steel Institute (AISI), which includes O1 low-carbon steel, A2 steel and D2 high-carbon high-chromium steel.A2 Tool Steel is a versatile, air-hardening tool steel that is characterized by good toughness and excellent dimensional stability in heat treatment. A2 is intermediate in wear resistance between O1 oil-hardening tool steel and D2 high-carbon, high-chromium tool steel. A2 provides an effective combination of strength and toughness, tool performance, price, and a wide variety of product forms.
What Is A2 Tool Steel Used For?
APPLICATIONS: Punches and dies, chuck jaws, cutting tools for woodworking, tooling for plastic injection, dowel pins, hammers, industrial knives, and gage A2 steel bar is available in a several forms, including square, round, and rectangular. This highly versatile material can be used for a wide variety of tools that require wear resistance, such as industrial hammers, knives, slitters, punches, tool holders, and woodworking cutting tools.
For inserts and blades, A2 steel resists chipping so that it lasts longer, often making it a more economical choice than high-carbon D2 type steel. It is often used for blanking and forming thread roller dies, stamping dies, trimming dies, injection mold dies, mandrels, molds, and spindles.
A2 tool steel properties
A2 is also an air-hardening tool steel but includes less than half the chromium (4.75 - 5.50%) and a bit less carbon (0.95 - 1.05%) than D2. It's highly wear-resistant and moderately tough. Like D2, it is incredibly resistant to distortion during heat treating and is moderately machinable and grindable.
Popular hardness ranges for A2 run between 57 - 62 HRC with a yield strength range between 185 ksi - 230 ksi.
Relevant Steel Specification of A2 Tool Steel
Country | USA | German | Japan | British |
Standard | ASTM A681 | DIN EN ISO 4957 | JIS G4404 | BS 4659 |
Grades | A2/T30102 | 1.2363/X100CrMoV5 | SKD12 | BA2 |
AISI A2 Tool Steel Chemical Composition & Other Equivalents
ASTM A681 | C | Mn | P | S | Si | Cr | V | Mo |
A2/T30102 | 0.95 | 1.05 | 0.40 | 1.00 | 0.03 | 0.03 | 0.10 | 0.50 | 4.75 | 5.50 | 0.15 | 0.50 | 0.90 | 1.40 |
DIN ISO 4957 | C | Mn | P | S | Si | Cr | V | Mo |
1.2363/X100CrMoV5 | 0.95 | 1.05 | 0.40 | 0.80 | 0.03 | 0.03 | 0.10 | 0.40 | 4.80 | 5.50 | 0.15 | 0.35 | 0.90 | 1.20 |
JIS G4404 | C | Mn | P | S | Si | Cr | V | Mo |
SKD12 | 0.95 | 1.05 | 0.40 | 0.80 | 0.03 | 0.03 | 0.10 | 0.40 | 4.80 | 5.50 | 0.15 | 0.35 | 0.90 | 1.20 |
BS 4659 | C | Mn | P | S | Si | Cr | V | Mo |
BA2 | 0.95 | 1.05 | 0.30 | 0.70 | 0.035 | 0.035 | . . . | 0.40 | 4.75 | 5.25 | 0.15 | 0.40 | 0.90 | 1.10 |
Smelting Option
1 EAF: Electric Arc Furnace
2 EAF+LF+VD: Refined-smelting and vacuum degassing
3 EAF+ESR: Electro Slag Remelting
4 EAF+PESR: protective atmosphere Electro Slag Remelting
5 VIM+PESR: Vacuum induction melting
Forming Option
1 Hot rolling process
2 Hot Forging: Electro-hydraulic; High-speed-hydraulic; Oil-hydraulic; Precision-forging
Heat-treatment Option
1 +A: Annealed (full/soft/spheroidizing)
2 +N: Normalized
3 +NT: Normalized and tempered
4 +QT: Quenched and tempered (water/oil)
Suface Option
1 Black Surface
2 Grounded: Bright but rough ; Not precision
3 Machining for plate: Bright and precision; Little turning scar
4 Peeled/Turned: Bright and precision; Little turning scar
5 Polished: Very Bright and precision size; Not turning scar
Other Services
1 Cutting: Small pieces
2 CNC Machine: Produce as your drawing
3 Package: Bare/Nylon/Canvas/Wooden
4 Payment:T/T, L/C, O/A(request credit)
5 Transport:FOB/CFR/CIF/DDU/DDP (train/ship/Air)
ASTM A2 Tool Steel Mechanical Properties
Physical Properties
Temperature | 68°F | 375°F | 750°F |
(20°C) | (200°C) | (400°C) |
Density | | | |
lbs/in3 | 0.279 | 0.277 | 0.275 |
kg/m3 | 7 750 | 7 700 | 7 650 |
Modulus of elasticity | | | |
psi | 27.5 x 106 | 26.9 x 106 | 24.6 x 106 |
N/mm2 | 190 000 | 185 000 | 170 000 |
Coefficient of thermal expansion | | | |
per °F from 68°F | - | 6.5 x 10-6 | - |
per °C from 20°C | - | 11.6 x 10-6 | - |
Mechanical Properties of A2 Steels
Properties | Metric | Imperial |
Hardness, Rockwell C (as air-hardened (63-65 HRC average), 60-62 HRC at 205°C, 59-61 HRC at 260°C, 58-60 HRC at 315°C, 57-59 HRC at 370°C and 425°C and 480°C, 56-58 HRC at 540°C, 50-52 HRC at 595°C, 42-44 HRC at 650°C) | 64 | 64 |
Bulk modulus (typical for steels) | 140 GPa | 20300 ksi |
Machinability (based on carbon tool steel) | 65% | 65% |
Shear modulus | 78.0 GPa | 11300 ksi |
Poisson's ratio | 0.27-0.30 | 0.27-0.30 |
Elastic modulus | 190-210 GPa | 27557-30457 ksi |
PHYSICAL PROPERTIES
Density: 0.284 lb/in3 (7861 kg/m3)
Specific Gravity: 7.86
Modulus of Elasticity: 30 x 106 psi (207GPa)
(207 GPa W/m/°K)
Machinability: 70% of a 1% carbon steel
HEAT TREATING INSTRUCTIONS
HARDENING
Critical Temperature: Ac1: 1460°F (793°C)
Preheating: Heat at a rate not exceeding 400°F per hour (222°C per hour) to 1150-1250°F (621-677°C) and equalize. Then heat to 1300-1400°F (704-760°C).
Austenitizing (High Heat): Heat slowly from the preheat. Furnace or Salt: 1725-1750°F (941-954°C) Soak for 30 minutes for the first inch (25.4 mm) of thickness, plus 15 minutes for each additional inch (25.4 mm).
Quenching: Air, pressurized gas, or interrupted oil to 150-125°F(66-51°C).
Note: Sizes over 3 inches (76.2mm) in cross section may not achieve full hardness by cooling in still air. It is usually necessary to increase the quench cooling rate between 1400 to 900°F (760 to 482°C) by using an air blast, pressurized gas, or an interrupted oil quench. For the oil quench, quench until black, about 900°F (482°C), then cool in still air to 150-125°F(66-51°C).
Tempering: Temper immediately after quenching. Hold at temperature for 1 hour per inch (25.4 mm) of thickness, 2 hours minimum, then air cool to ambient temperature. The typical tempering range is 350 to 500°F (177 to 260°C).
To minimize internal stresses in cross sections greater than 6 inches (152.4 mm) and to improve stability in tools that will be EDM'd after heat treatment, a soaking time of 4 to 6 hours at the tempering temperature is strongly recommended.
Tempering Temperature°F | Rockwell C |
300 | 62 |
400 | 60 |
500 | 58 |
600 | 56 |
700 | 56 |
800 | 56 |
900 | 56 |
1000 | 55 |
1100 | 50 |
1200 | 43 |
1300 | 34 |
Cryogenic Treatment: Some prefer to do cryogenic treatment as an extension of the quench from the austenitizing treatment. Others prefer to cryogenically treat after tempering.
Address:
Floor17, Xinlian Building, Wuxi, Jiangsu, China
Business Type:
Manufacturer/Factory, Trading Company
Business Range:
Construction & Decoration, Metallurgy, Mineral & Energy
Management System Certification:
ISO 9000
Company Introduction:
Zhongtong Weiye Special Steel Co., Ltd. is a professional and reputable steel manufacturer and exporter in Wuxi city, China. Wuxi is close to Shanghai, enjoys excellent geographic location and convenient water, land and air transportation. Wuxi become the biggest stainless steel sheet, plate and coil supply Center in China. Zhongtong Weiye as one of the largest stock-holder and manufacturers supply a complete range of Stainless steel, pipes, galvanized products, bars, strips, angle steel, nickel alloy, super alloys and other related products. The material is all famous brand including Shanxi Taigang Iron& Steel CO, . Ltd (TISCO), Zhangjiagang Pohang (ZPSS), Shanghai(BAO STEEL), Ningbo (Baoxin) etc. The company has a modern indoor warehouse, with nearly a thousand varieties in stock that is ready for same day dispatch from our warehouses. Products are mainly exported to Europe, America, Southeast Asia, the Middle East and other countries and regions. Generally, our products are widely applied in construction, bridge, car manufacturing, electrical installation and mining. We have won recognition from our clients due to our excellent credit and services. Zhongtong Weiye Special Steel Co., Ltd. Follows the tenet of "quality of survival, integrity and development". We commit to sell quality products and make quick delivery to our customers. We would like to use high quality products and excellent service to develop a bright future with our clients.
Different kinds of products are available in our company. We′re pleased to get your Inquiry and we will reply you as soon as possible. We stick to the principle of "quality first, service first, continuous improvement and innovation to meet the customers" for the management and "zero defect, zero complaints" as the quality objective.