Product categories
More »
Stainless steel
Stainless Steel specifications held in the austenitic, martensitic and precipitation hardening varieties. Stocks are held in British Standard and International standards. Below is listed our most commonly supplied grades; please contact our sales office. Also stock is 301 stainless spring temper rolled strip.
Hi-Steel HSLA-80
Hi - Speed, high Speed Steel Tool Steel (made) : highly processed into the Tool Steel, carbon content high, while containing cr quantity is low (about 4%), reason burnish of Steel surface gloss darker, after heat can reach by HRc62 high hardness, resistance to rust performance not on a roll.
Steel mould
Steel mould and Steel mould suppliers, global delivery, stock supply Steel mould steels.
Heat resistant steel
Heat resistant steel. AS Orlov Izobret. Mashinostr. 3, 48-49, 7/2000. The purpose of this work was to increase plasticity of heat resistant steel after aging at the 500-1300 deg C temperature and to improve its operational reliability.
Tool steel
Comprehensive stocks held of tool steel, including hot work, cold work and plastic mould tool steel specifications. Below we detail our most common grades. Other British Standard and international special steels and tool steels are also available, please contact our sales office.
Ball bearing steel
Supplies Ball bearing steel of all types, along with carbon steel and specialty balls, to OEM's around the world. Also offers platinum balls, brass balls, gold, titanium, aluminum, carbon and plastic balls.
Spring steel
Carbon spring steel is held in a wide range of sizes. Detailed below are our most common specifications. Carbon steel strip and spring steel sheet is available most commonly in the hardened and tempered condition, though certain sizes are available in the annealed condition. Round and flat bar is stocked in the as rolled condition. Most spring steel specifications are held to British Standard steel specifications including BS1449 & BS970.
Alloy steel
Alloy steel is steel alloyed with a variety of elements in total amounts of between 1.0% and 50% by weight to improve its mechanical properties. Alloy steels are broken down into two groups: low alloy steels and high alloy steels. The difference between the two is somewhat arbitrary: Smith and Hashemi define the difference at 4.0%, while Degarmo, et al., define it at 8.0 %.[1][2] Most commonly, the phrase "alloy steel" refers to "low alloy" steels.
News
More »
Enterprise email
Home » Tool steel » Product introduction
X210Cr12
- Numbers: 2010122103
- Model: 722M24
- Producers: Longhai
- Update time: 2010.12.21
- Browse:
Product Description:
|
1.2379 X155CrVMo12-1 is a high carbon, high chromium, molybdenum, vanadium, air hardening tool steel which offershigh surface hardness, good wear resistance, through hardening properties, dimensional stability and high resistance to tempering effect. 1.2379 X155CrVMo12-1 tool steel is also suitable for vacuum hardening. |
| Typical Analysis 1.2379 X155CrVMo12-1 | ||||
|
C. |
Si. |
Cr. |
Mo. |
V. |
|
1.50% |
0.30% |
12.00% |
0.80% |
0.90% |
Forging:
Heat slowly and uniformly to 700°C then more rapidly to 900/1040°C. After forging 1.2379 cool slowly.
Annealing:
Anneal at 850°C and slow furnace cool. Hardness after annealing will be approx. 225 brinell.
Hardening:
Pre heat the 1.2379 component slowly to 750/780°C and thoroughly soak. Continue heating to the final hardening temperature of 1000/1030°C and allow the component to be heated through. Quench in oil or cool in air.
Tempering:
Heat uniformly and thoroughly at the selected tempering temperature and hold for at least one hour per inch of total thickness. Double tempering of 1.2379 is recommended to be carried out with intermediate cooling to room temperature.
| Tempering °C |
150 |
200 |
250 |
300 |
350 |
400 |
| HRc |
62/61 |
61/60 |
60/59 |
57/56 |
56/55 |
56/55 |
Stress Relieving:
If machining operations have been heavy or if the 1.2379 tool has an unbalanced section, remove stresses before hardening by heating up to 700°C, equalise, then cool slowly.
Hard Chromium Plating:
After hard chromium plating tempering of 1.2379 tool steel is recommended at 180°C for 4 hours to avoid hydrogen embrittlement. Tempering is to be performed immediately after chromium plating.
Welding:
Due to the high risk of crack formation welding of 1.2379 tool steel should be avoided, if possible. When, howe ver welding is essential, the following serves as a guide:
A. Welding of soft annealed 1.2379 tool steel.
· Preheat to 300 - 500°C
· Weld at 300-500°C
· Immediately stress relieve
Electrode: Cr-Mo alloy electrode for welding structural steel.
B. Welding in connection with hardening of soft annealed 1.2379 tool steel.
· Heat to austenitizing temperature.
· Cool to approx. 500°C
· Weld at approx. 500°C
· Cool to approx. 100°C in the same way as at normal hardening, then temper to desired hardness. Double tempering will
reduce the risk of crack formation.
Electrode: Hard facing electrode.
C. Repair welding of 1.2379 tool steel in hardened and tempered condition.
· Preheat to the tempering temperature (min. 200°C) previously used.
· Weld at tempering temperature
· Heat immediately to tempering temperature, but max. 300°C. Soaking time 2 hours.
Electrode: Hard facing electrode.
| Physical Properties: 1.2379 X155CrVMo12-1 | Temperature: | ||
| 20°C | 200°C | 400°C | |
| Density (kg/dm³) | 7.70 | 7.65 | 7.60 |
| Coefficient of thermal expansion (per °C from 0°C) | - | 22.0 x 10-6 | 10.8 x 10-6 |
| Thermal conductivity (cal/cm.s °C) | 40.9 x 10-3 | 50.4 x 10-3 | 55.2 x 10-3 |
| Specific heat (cal/g °C) | 0.110 | ||
| Modulus of elasticity: | |||
| Kp/mm² | 19 700 | 19 200 | 17 650 |
| N/mm² | 193 000 | 188 000 | 173 000 |
