PH 13-8 Mo (UNS S13800 / W.Nr. 1.4534)

PH 13-8Mo (UNS S13800 / W.Nr. 1.4534)

PH 13-8Mo (UNS S13800 / W.Nr. 1.4534) is a martensitic precipitation/age-hardening stainless steel capable of high strength and hardness along with good levels of resistance to both general corrosion and stress-corrosion cracking. In addition, the alloy exhibits good ductility and toughness in large sections in both the longitudinal and transverse directions. The excellent properties of PH 13-8 Mo stainless are obtained through close control of chemical composition and microstructure plus specialized melting which reduces impurities and minimizes segregation. Compared to other ferrous-based materials, this alloy offers a high level of useful mechanical properties under severe environmental conditions.

Equivalent Grades

Trademark	GB	GOST	ASTM	UNS	DIN	W.Nr.	NF	BS	JIS	SS
PH 13-8Mo	–	–	XM-13	S13800	X3CrNiMoAl13-8-2	1.4534	–	–	–	–

Chemical Composition, %

Alloy	C	Si	Mn	P	S	Cr	Ni	Mo	N	Fe
PH 13-8Mo	≤0.05	≤0.10	≤0.10	≤0.01	≤0.008	12.25-13.25	7.5-8.5	2.0-2.5	≤0.01	Bal

Typical Physical and Mechanical Properties (RT, Annealed)

Density, g/cm3	Melting Point, ℃	Tensile Strength, MPa	Yield Strength, MPa	ELongation, %	Hardness, HRB
7.6	1030-1130	≥1140	≥1210	≥12	/

Available Products and Specifications

Rod, Bar, Wire and Forgings	ASTM A564, 705, SAE AMS 5629
Plate, Sheet and Strip	ASTM A693, SAE AMS 5604
Pipe and Tube	–
Welding Product	–
Others	–

Features

PH 13-8 Mo stainless has good fabrication characteristics and can be age-hardened by a single low temperature treatment. Cold work prior to aging increases the aging, especially for lower aging temperatures.

Applications

PH 13-8 Mo stainless has been used for valve parts, fittings, cold-headed and machined fasteners, shafts, landing gear parts, pins, lockwashers, aircraft components, nuclear reactor components and petrochemical applications requiring resistance to stress-corrosion cracking. Generally, this alloy should be considered where high strength, toughness, corrosion resistance, and resistance to stress-corrosion cracking are required in a steel showing minimal directionality in properties.