FirstMold Half Logo

Mold Making Materials

As a product developer, you only need to have a basic understanding of mold making materials.

mold making materials
Types and Applications

Brief understanding of mold making materials

For our customers, a basic understanding of mold-making materials can also provide a small help for their own products. 

This knowledge facilitates clearer communication and more accurate specifications, enabling our customers to make informed decisions about materials based on their product’s performance, cost, and quality. It helps our customers set realistic expectations for product performance and limitations, understand the general costs of product manufacturing, and plan for potential supply chain issues.

Material Type Common Grades Characteristics Typical Applications
Tool Steel
P20
Pre-hardened, good polishability
General-purpose molds
H13
Hot work steel, high toughness
High-volume injection molds
D2
High wear resistance
Stamping molds
S7
Shock-resistant
Molds requiring high impact resistance
Stainless Steel
420
Corrosion-resistant, hardenable
Medical or food-grade molds
17-4PH
High strength, good corrosion resistance
Aerospace, automotive molds
Carbon Steel
1018
Good machinability, low cost
Prototype molds
1045
Higher strength, medium carbon steel
Low-volume production molds
Aluminum
7075
High strength, lightweight
Prototype, low-volume molds
6061
Good combination of strength, weldability
Non-critical parts, mold bases
Pre-Hardened Steel
4140
Good toughness, high fatigue strength
Gear, automotive molds
4340
High toughness, high strength
Large molds requiring toughness
High-Speed Steel
M2
High heat resistance, wear resistance
High precision molds, cutting tools
Zinc Alloys
ZA-12
Good strength, lower cost than aluminum
Die casting molds
Beryllium Copper
Alloy 25
High thermal conductivity, strength
Cooling inserts, hot runner systems
Chromium Steel
52100
High hardness, wear resistance
High-precision bearings, molds