1.2312 Tool Steel (P20+S)

1.2312 Plastic Mould Steel: Enhanced Machinability for High-Volume Tooling. Pre-hardened steel with added sulfur for superior chip-breaking and speed.

1.2312 Tool Steel (P20+S)

1.2312 is a versatile, pre-hardened chrome-manganese-molybdenum steel. At Progressive Metal Manufacturing, we supply this grade specifically for projects requiring extensive machining. The addition of sulfur enhances its machinability compared to standard 1.2311, reducing tool wear and production time.

Chemical Composition	Percentage %
Carbon	0.35-0.45%
Manganese	1.40-1.60%
Silicon	0.55% max
Chromium	1.80-2.00%
Molybdenum	0.15-0.25%
Phosphorous	0.03% max
Sulphur	0.05-0.10%

To ensure the structural integrity of 1.2312 tool steel, the heat treatment parameters—including heating rates, soaking durations, and cooling cycles—must be precisely calibrated. These variables are largely dictated by the specific geometry and mass of each individual component.

Beyond the physical dimensions of the part, the selection of the furnace, the quenching medium, and the efficiency of material handling equipment also play critical roles in achieving the desired metallurgical properties. We recommend collaborating closely with your specialized heat treatment partner to establish a protocol tailored to your specific application requirements.

Certified Quality Assurance

At Progressive Metal Manufacturing, reliability is embedded in our supply chain. Our 1.2312 tool steel is managed and distributed under a rigorous quality management system, fully compliant with ISO 9001 standards. This commitment ensures that every batch delivered meets strict industrial benchmarks for consistency and performance, providing our partners with the confidence that their raw materials are as dependable as their final products.

Industrial Applications & Versatility

1.2312 (40CrMnMoS8-6) is a premium plastic mold steel specifically engineered for projects where enhanced machinability is a priority.

Because it is pre-hardened and contains added sulfur for easier cutting,

it is the industry standard for complex molding environments. Primary applications include:

High-Precision Tooling: Ideal for injection molds, zinc die casting dies, and die holders.

Structural Support: Widely used for bolsters, backers, and mold bases.

Mechanical Engineering: Due to its high tensile strength, it is an excellent choice for durable shafts, wear strips, and heavy-duty machinery components.

Precision Supply & Custom Specifications

We understand that precision begins with the raw form. Our inventory of 1.2312 steel is available in a comprehensive range of profiles,

including round bar, flat bar, plate, and block. Utilizing advanced sawing technology, we provide:

Tailored Round Bars: Sawn to your exact length requirements, from individual prototypes to high-volume batches.

Custom Rectangular Sections: Precision-cut from flat bar or plate to match your specific geometric tolerances.

Ready-to-Machine Blocks: Prepared for immediate integration into your tooling workflow.

Our technical sales department is ready to coordinate your specific sizing needs to minimize waste and optimize your production timelines.

1.2312 Tool Steel (P20+S)