Table 12 Commercial P/M grades of water-atomized stainless steel powder

Composition, wt% Sieve analysis, %Cr Ni Si Mo Cu Sn Mn C S P Fe O (ppm) N (ppm)

Apparentdensity(a),g/cm3

Flowrate(a),s/50 g

+100 mesh -325 mesh

Austenitic grades303 17-18 12-13 0.6-0.8 . . . . . . . . . 0.3(b) 0.03(b) 0.1-0.3 0.03(b) bal 1000-2500 200-500 3.0-3.2 24-28 3(b) 40-60303LSC 17-18 12-13 0.6-0.8 . . . 2(c) 1(c) 0.3(b) 0.03(b) 0.1-0.3 0.03(b) bal 1000-2500 200-500 2.8-3.0 26-30 1-3 30-40304L 18-19 10-12 0.7-0.9 . . . . . . . . . 0.3(b) 0.03(b) 0.03(b) 0.03(b) bal 1000-2500 200-500 2.5-2.8 28-32 1-4 35-45ULTRA 304L 19(b) 11(c) 0.8(c) . . . 0.8(c) 2(c) 0.2(c) 0.02(c) 0.01(c) 0.01(c) bal 2.7(c) 30(c) 3(c) 40(c)

316L 16.5-17.5 13-14 0.7-0.9 2-2.5 . . . . . . 0.3(b) 0.03(b) 0.03(b) 0.03(b) bal 1000-2500 200-500 2.6-3.0 24-32 1-4 35-45316LSC 16.5-17.5 13-14 0.7-0.9 2-2.5 2(c) 1(c) 0.3(b) 0.03(b) 0.03(b) 0.03(b) bal 1000-2500 200-500 2.9(c) 25(c) 1(c) 42(c)

317L 19(c) 14(c) 0.8(c) 3(c) . . . . . . 0.3(b) 0.3(b) 0.3(b) 0.3(b) bal 1000-2500 200-500 2.9(c) 27(c) 2(c) 44(c)

SS100 20(c) 17(c) 0.8(c) 5(c) . . . . . . 0.2(c) 0.2(c) 0.3(b) 0.2(c) bal 1000-2500 200-500 2.9(c) 29(c) 2(c) 45(c)

Martensitic grades(d)

410L 12-13 . . . 0.7-0.9 . . . . . . . . . 0.3(b) 0.3(b) 0.3(b) 0.3(b) bal 1500-2500 200-500 2.9(c) 27(c) 39(c)

Ferritic grades430L 16-17 . . . 0.7-0.9 . . . . . . . . . 0.3(b) 0.3(b) 0.3(b) 0.3(b) bal 1500-2500 200-500 2.8-3.0 27-30 1-3 40-50434L 16-18 . . . 0.7-0.9 0.5-1.5 . . . . . . 0.3(b) 0.3(b) 0.3(b) 0.3(b) bal 1500-2500 200-500 2.8-3.0 27-30 1-3 40-50

(a) Determined on unlubricated powder.

(b) Maximum.

(c) Typical.

(d) With C <0.03%, this grade is ferritic; graphite addition to the low-carbon grade powder renders it martensitic upon sintering.