GB/T 46187-2025Additive manufacturing — Material — Stainless steel powder (English PDF)

4.1 Brand and Chemical Composition

The grade and chemical composition of the powder should conform to the specifications in Table 1.Other ingredients may also be provided upon negotiation between the supplier and the buyer, and as specified in the contract. The powder.

Table 1.Grades and Chemical Composition Unified number character code Brand Chemical composition (mass fraction)/% C Si Mn PS Ni Cr Mo S30408 06Cr19Ni10 <=0.08 <=1.00 <=2.00 <=0.045 <=0.030 8.00~

11.00 18.00~

S31603 022Cr17Ni12Mo2 <=0.030 <=1.00 <=2.00 <=0.045 <=0.030 10.00~

14.00 16.00~

2.00~

3.00 S51380 04Cr13Ni8Mo2Al <=0.05 <=0.10 <=0.20 <=0.010 <=0.008

7.50~

8.50 12.30~

2.00~

3.00 S51550 05Cr15Ni5Cu4Nb <=0.07 <=1.00 <=1.00 <=0.030 <=0.015

3.50~

5.50 14.00~

<=0.50 S51740 05Cr17Ni4Cu4Nb <=0.07 <=1.00 <=1.00 <=0.040 <=0.030 3.00~

5.00 15.00~

Unified number character code Grade Cu Al Nb NO - - - S30408 06Cr19Ni10 - - - <=0.08 <=0.06 - - - S31603 022Cr17Ni12Mo2 - - - <=0.08 <=0.06 - - - S51380 04Cr13Ni8Mo2Al - 0.90~

1.35 - <=0.03 <=0.04 - - -

S51550 05Cr15Ni5Cu4Nb 2.50~ 0.15~

0.45 <=0.04 <=0.04 - - -

S51740 05Cr17Ni4Cu4Nb 3.00~ - 0.15~

0.45 <=0.04 <=0.04 - - -

4.2 Powder Properties

4.2.1 Particle size

The particle size of the powder should conform to the specifications in Table 2.If the buyer has other special requirements regarding particle size, these can be negotiated between the supplier and the buyer and specified in the contract. Please note. Table 2 Particle size The unit is micrometers.

Category Powder Specifications Particle Size Composition Particle Size Distribution Recommended Application Process Category I. 15~53, >53, not exceeding 5% D10>=15, 25<=D50<=45 D90<=65 Laser powder bed melting process Class II 45~150 <=45, not greater than 5% >150, not greater than 5% - Electron beam powder bed melting process Class III, 53-180 <=53, not greater than 5% >180, not greater than 5% - Laser-directed energy deposition process

4.2.2 Loose packing density

The loose density of the powder should not be less than 3.80 g/cm3.

4.2.3 Tap density

The tapped density of the powder should not be less than 4.5 g/cm3.

4.2.4 Liquidity

The powder should not have a flowability greater than 25s/50g.

4.2.5 Appearance Quality

The powder should be gray or silver-gray in appearance, with a uniform color, no lumps, and no visible inclusions.

4.2.6 Other

If the buyer has requirements regarding the hollow powder ratio and spherical powder ratio, these can be negotiated between the supplier and the buyer and specified in the contract.

4.3 Part Performance

As required by the buyer, and after consultation between the supplier and the buyer, it is specified in the contract that the supplier can provide the mechanical properties and hardness of the printed parts after heat treatment.

Etc. See Appendix A for examples.

5.1 Chemical composition

Chemical composition analysis of powders shall be performed in accordance with GB/T 223 (all parts), GB/T 11170, GB/T 11261, and GB/T 20123.

The arbitration shall be conducted in accordance with the provisions of GB/T 20124 and GB/T 34208.The arbitration decision shall be determined through negotiation between the supplier and the buyer.

5.2 Particle size

The particle size distribution of powder was determined according to GB/T 1480, and the particle size composition of powder was determined according to GB/T 19077. conduct.

5.3 Loose packing density

The loose density of the powder was determined in accordance with GB/T 1479.1.

5.4 Tap density

The tap density of the powder was determined in accordance with GB/T 5162.

5.5 Liquidity

The flowability of the powder was determined in accordance with GB/T 1482.

5.6 Sphericity

The sphericity of the powder was determined according to the provisions of YS/T 1297.