Stainless 440C Product Guide

Applications | Specifications | Mechanical and Chemical Data | Tolerances

Overview

High strength, moderate corrosion resistant, good hardness and wear resistant material. After heat treatment, Stainless 440C is capable of attaining the highest strength, hardness and wear resistance of all the stainless alloys. Typically used in rolling element bearing, valve seats, high-quality knife blades, surgical instruments, chisels, gage blocks, cutlery, ball bearings and races, molds and dies, knives, valve components, measuring instruments.

Common Trade Names

UNS S44004, AISI 440C, Alloy 440C, Premar 440C, martensitic stainless steel

Other Resources

Safety Data Sheet | Weight Calculator | Mill Test Reports

Products

Purchase Ball 440C | Rectangle Bar 440C | Round Bar 440C | Square Bar 440C

Applications

Rolling Element Bearings
Valve Seats/Components
Knife Blades
Surgical Instruments
Chisels
Gage Blocks
Cutlery
Ball Bearings
Molds
Dies
Measuring Instruments

Stainless 440C Specifications

ASTM	AMS
A480	5630


Physical Properties 440C
Density	0.282 lb/in3
Ultimate Tensile Strength	100 ksi
Yield Tensile Strength	65 ksi
Shear Modulus	11,000 ksi
Shear Strength	63 ksi
Fatigue Strength	38 ksi
Hardness Rockwell \| Brinell	B99 \| 233
Elongation at Break Percentage	14%
Modulus of Elasticity	28,000 ksi
Poisson's Ratio	0.28
Machinability Percentage	40%
Melting Point	2,500-2,700 °F
Specific Heat	1.2 x 10^-1 BTU/lb-°F
Thermal Conductivity	156 BTU-in/hr-ft^2-°F
Electrical Conductivity	2.4% IACS

Chemistry Information
Element	Percentage
Fe	80.75
C	1.05 max
Mn	0.4 max
Si	0.4 max
Mo	0.4 max
Cr	17 max

New Lower Shipping Rates! Get the industry's best ground prices and save more—especially on longer lengths.

Open for Orders 24/7!