Chemical Composition Element Content (wt. %) C ≤0.050 Si ≤1.00 Mn ≤1.00 P ≤0.010 S ≤0.008 Cr 12.25–13.25 Ni 7.50–8.50 Mo 2.00–2.50 N ≤0.010 Other Al: 0.90–1.35; Fe: Balance

Mechanical Properties Condition Tensile Strength Yield Strength (0.2%) Elongation Hardness H950 reference ≈1310 ≈1170 ≥10 ≈38–44 HRC

Aerospace components High-strength shafts Valves and fittings Tooling Precision mechanical components High-performance engineering systems

Chemical Composition Element Content (wt. %) C ≤0.050 Si ≤1.00 Mn ≤1.00 P ≤0.010 S ≤0.008 Cr 12.25–13.25 Ni 7.50–8.50 Mo 2.00–2.50 N ≤0.010 Other Al: 0.90–1.35; Fe: Balance

Mechanical Properties Condition Tensile Strength Yield Strength (0.2%) Elongation Hardness H950 reference ≈1310 ≈1170 ≥10 ≈38–44 HRC

Aerospace components High-strength shafts Valves and fittings Tooling Precision mechanical components High-performance engineering systems

13-8MoPH Stainless Steel Seamless Pipe

Grade: 13-8MoPH/XM-13/S13800

Size:

Seamless: 6mm*1mm-720mm*50mm

Coiled: 4mm*0.5mm-32mm*3mm

Standard: ASTM A312, ASTM A213 etc.

Surface: No.1(Pickling), Bright(Polished)

XM-13 Stainless Steel Pipe, commonly known as 13-8MoPH, is a martensitic precipitation-hardening stainless steel designed for high strength, good corrosion resistance, and excellent dimensional stability. Its controlled alloying and aging treatments provide a range of mechanical properties for demanding engineering service. The grade is widely associated with aerospace, defense-related engineering, valve, shaft, tooling, and high-strength mechanical applications.

Chemical Composition

Element	Content (wt. %)
C	≤0.050
Si	≤1.00
Mn	≤1.00
P	≤0.010
S	≤0.008
Cr	12.25–13.25
Ni	7.50–8.50
Mo	2.00–2.50
N	≤0.010
Other	Al: 0.90–1.35; Fe: Balance

Mechanical Properties

Condition	Tensile Strength	Yield Strength (0.2%)	Elongation	Hardness
H950 reference	≈1310	≈1170	≥10	≈38–44 HRC

Aerospace components
High-strength shafts
Valves and fittings
Tooling
Precision mechanical components
High-performance engineering systems

Introduction

Specification

Chemical Composition

Element	Content (wt. %)
C	≤0.050
Si	≤1.00
Mn	≤1.00
P	≤0.010
S	≤0.008
Cr	12.25–13.25
Ni	7.50–8.50
Mo	2.00–2.50
N	≤0.010
Other	Al: 0.90–1.35; Fe: Balance