18Ni300 Maraging Steel Powder
Tool Steel Powders · Metal Additive Manufacturing Powder
18Ni300 maraging steel (1.2709, MS1) is the highest-strength common AM steel: as-built LPBF parts reach 1,230 MPa UTS, and ageing at 490°C develops up to 1,900-2,000 MPa with 50+ HRC — ideal for injection-mold cores, punches and high-load tooling. Its near-zero carbon content and nickel-cobalt-molybdenum chemistry give excellent weldability and dimensional stability during heat treatment. 15-45 µm and 15-53 µm gas-atomized powder is standard; tooling buyers commonly order MS1-equivalent grades from major machine OEMs. When sourcing, verify nickel 17-19%, cobalt 8.5-9.5% and molybdenum 4.5-5.2% on the mill certificate, and confirm the supplier's ageing response data (hardness vs ageing time).
Typical Applications
18Ni300 Maraging Steel Powder - Key Properties
| Chemical composition (wt%) | Fe bal · Ni 17-19 · Co 8.5-9.5 · Mo 4.5-5.2 · Ti 0.6-0.8 · Al 0.05-0.15 |
| Density | 8.10 g/cm³ (bulk) |
| Tensile strength (as-built) | 1,228 MPa UTS · 1,028 MPa YS; aged 1,800-2,000 MPa (median of 16 data points) |
| Elongation (as-built) | 12% (median of 16 data points) |
| Hardness | ~454 HV as-built · 50-54 HRC aged |
| Particle size | 15-45 µm / 15-53 µm |
| Production | Gas atomization (VIGA) |
| Standards | DIN 1.2709 · AMS 6514 · 18Ni300 / MS1 |
7 product offer(s) — 5 supplier(s)
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18Ni300 Maraging Steel Powder for Tooling ✓ Verified15-53 μm · Weilaray Advanced Powder (Hunan, China)Quote$37.00–48.00per kg
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Custom size · ZTT SRIM Additive Manufacturing Co.,Ltd. (Nantong, Jiangsu)QuotePrice on request
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Custom size · Xi'an Ouzhong Material Technology Co., Ltd. (Xi'an, Shaanxi)QuotePrice on request
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15-53,45-106,53-150μm · Zhongke Bulafei Material Technology (Dongguan) Co., Ltd. (Dongguan, Guangdong)QuotePrice on request
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45-105μm · Sichuan Zenglong New Material Technology Co., Ltd. (Guang'an, Sichuan)QuotePrice on request
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15-53μm · Sichuan Zenglong New Material Technology Co., Ltd. (Guang'an, Sichuan)QuotePrice on request
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53-150μm · Sichuan Zenglong New Material Technology Co., Ltd. (Guang'an, Sichuan)QuotePrice on request
Frequently Asked Questions
How much does 18Ni300 maraging steel powder cost?
Maraging 300 powder typically quotes $55-110 per kg. Request current quotes from verified suppliers on this page — responses within 24 hours.
What ageing treatment does printed maraging steel need?
Age at 480-500°C for 4-6 hours after printing (with stress relief). This precipitation-hardens the alloy to 50+ HRC with minimal distortion — no quench required.
Is 18Ni300 suitable for injection molds?
Yes — it is a top choice for high-wear mold cores and conformal-cooled inserts thanks to its 50+ HRC aged hardness, polishability and near-zero distortion during ageing.
What particle size should I order?
15-45 µm for fine details on small tooling inserts; 15-53 µm general purpose. State your machine and layer thickness in the inquiry.
How does maraging 300 compare to H13 for tooling?
Maraging 300 reaches higher hardness (54 HRC) and better toughness with easier heat treatment, while H13 offers hot-work capability above 500°C service. Choose by tool service temperature.
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