Steel Casting

Extending casting field 's new horizon

Steel Casting

Steel investment casting has become synonymous with low-cost, highly accurate near-net-shape metal forming. Steel castings do not include costly chrome and nickel additives typical of stainless steel, yet still manage to provide the widest range of mechanical properties of any alloy type.

We specialize in highly repeatable short production runs of carbon steel and low alloy steel investment castings in the 0 to 30 lbs range, and are capable of 100+ lbs castings.

  • Intricate, near-net shape parts without secondary machining
  • Easily convert multiple parts into single assemblies
  • Thin walls for weight reduction opportunities
  • Surface texture of 125 rms or better
  • Tolerances within +/- .005 inches per linear inch
  • Highly complex dimensional geometry

From concept to completion, ETPL can meet the form, fit, and function of your design.


Both carbon steel and low alloy steel investment castings offer smooth surface finishes without the need for grinding and polishing. Low alloy steel also provides slightly greater resistance to corrosion than carbon steel and is generally 20-30% lighter. Steel’s versatility allows it to meet a wide range of ductility, toughness, tensile strength, machinability, and variable hardness.


Compatible with a wide range of heat treating techniques for both hardening and softening, steel’s versatility makes it suitable for almost any application. Certain steel casting alloys can achieve up to 62 Rockwell C with proper heating. With secondary annealing, steel can also become one of the softest metals. Additional steel casting heating techniques include solution annealing, quench and tempering, normalizing, aging, precipitant hardening, induction hardening, carbon restoring, carbonizing, and case hardening.


Steel’s low cost, ductility, and machinability make it ideal every day-use items common to all industries. Typical examples of steel investment castings include mass-produced products such as brackets, hinges, and levers. Available in a wide variety of grades, steel can meet 90% of today’s applications and engineering requirements. Contact ETPL’s steel investment castings division for additional information or to request a quote.

Steel Investment Casting Inventory

4020 IC 4020, MIL-S-870, ASTM A-732 GR 6N
4115 MOD ASTM A-217 GR WC 9
4118 MOD ASTM A-217 GR WC 6
4130 IC 4130, AMS 5336 D, ASTM A-148, ASTM A-732 GR 7Q, MIL-S-22141, C11011102, C11577275
4140 IC 4140, AMS 5338 C, ASTM A-148, ASTM A-732 GR 8Q, MIL-S-22141, C11011102, C11577275
4340 IC 4340, AMS 5330 B, ASTM A732 GR 10Q, MIL-S-22141, C11577275
8620 IC 8620, ASTM A-148, ASTM A-732 GR 13Q, MIL-S-22141, C11577275
8630 IC 8630, ARMCO, ASTM A-732, MIL-S-22141, C11577275
8640 IC 8640, MIL-S-22141
8730 IC 8730
52100 IC 52100, ASTM A-732 GR 15A, MIL-S-22141

For futher details on developing casting products contact Energy Technocast Pvt Ltd at: