ASTM P21

2013-05-16 23:22:28 Print this page

The high quality USA ASTM P21 material is one of the more steel grades we supply, Mold Steel. P21 is our main production grade, which has been approved by customers in many countries since its initial production, including our P21 round bars, flat bar, forgings, fasteners, tubes, wires, strips, sheets & Plates, as well as a variety of profiles, professional high precision auto-lathe processing manufacturer of clinching fasteners, axes, standoffs, screws, studs, nuts, bolt, OEM parts and special shaped turning partsthe state of delivery includes quenched and tempered, annealed, machined semi-finished products, we also have strict management of the packaging, to avoid material damage from transportation. We are the best supplier of P21 materials, and we are willing to develop together with customers from all over the world.

Also includes P21 steel material norm, chemical composition, mechanical properties, datasheet, P21 equivalent, heat treatment and temperature process of P21, The peak hardness can be achieved, Contains all of the specification, welding properties, let us in P21 this steel grade have a more comprehensive understanding, Download the full P21 PDF version of this datasheet.

Chemical composition (wt.%) of P21

Elements	Min.（≥）	Max.（≤）
C	0.18	0.22
Si	0.20	0.40
Mn	0.20	0.40
P	-	0.030
S	-	0.030
Cr	0.15	0.30
Mo	-	-
V	0.15	0.25
W	-	-
Ni＋Cu	-	0.75
Ni	3.90	4.25
Al	1.05	1.25

Mechanical Properties of P21

Rp0.2 (MPa)	Rm (MPa)	Impact KV (J)	Elongation A (%)	A Z (%)	Delivery	Hardness HB
355 (≥)	665 (≥)	14	21	32	Solution & Aging, Ann, Ausaging, Q+T	233