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Martensitic Stainless Steel Seamless Welded Pipe AISI 440A/B/C 40mm
Martensitic Stainless Steel Seamless Welded Pipe AISI 440A/B/C 40mm
Martensitic Stainless Steel Seamless Welded Pipe AISI 440A/B/C 40mm
Martensitic Stainless Steel Seamless Welded Pipe AISI 440A/B/C 40mm
Specifications
Brand Name :
Zheheng
Model Number :
440A/B/C
Certification :
ISO9001
Place of Origin :
Wenzhou,China
MOQ :
MOQ500kg
Payment Terms :
L/C, D/P, T/T, Western Union
Supply Ability :
1000 Ton/Tons per Month
Delivery Time :
7-15 working days after receiving payment
Packaging Details :
In wooded cases or pallets,or as for clients requirement
Port :
Ningbo
OD :
Φ6--630mm
Section Shape :
Round
Package :
Seaworthy Standard Package
Price terms :
FOB,CIF,CFR,EXW
Length :
1-12m
Technique :
Hot rolled/Cold rolled
wall thickness :
1-40mm
Grade :
400 series
Other Grade :
UNS S44004/X105CrMo17/1.4125
Description

Overview

Stainless 440C is a high-carbon martensitic stainless steel. As a martensitic stainless steel, 440C is magnetic and can be hardened by heat treatment. The high carbon content in 440C provides high hardness and strength. Despite this carbon content, the chromium content is sufficient to retain its stainless characteristics. Martensitic steels are commonly used in applications where high strength and moderate corrosion resistance is required.

Application

Valve Seats

Surgical Instruments

Bearings

Bushings

Nozzles

Structural Aircraft Parts

440 Stainless Pipe Chemical Composition

440 Stainless Steel Chemical Composition, %
ASTM Steel AISI (UNS) C Si (≤) Mn (≤) P (≤) S (≤) Cr Mo (≤)
ASTM A276/A276M 440 Steel 440A (S44002) 0.60-0.75 1 1 0.04 0.03 16.0-18.0 0.75
440B (S44003) 0.75-0.95 1 1 0.04 0.03 16.0-18.0 0.75
440C (S44004) 0.95-1.20 1 1 0.04 0.03 16.0-18.0 0.75

Physical Properties

SS440 Physical Properties
Density (g/cm3) 7.8
Melting point (℃) 1370-1480
Specific heat capacity, J/(Kg·K) 460 (0-100 ℃)
Electrical resistivity (μΩ·m) 0.6 (20 ℃)
Elastic modulus (GPa) 200
Thermal conductivity (W/m·K) 24.2 (100 ℃)
Coefficient of thermal expansion 10.2 (0-100 ℃)

Mechanical Properties Stainless Steel 440

Mechanical Properties
Grade (UNS) Tensile Strength (MPa) ≥ Yield Strength, 0.2%, ≥ (MPa) Elongation in 50 mm (%) ≥ Reduction in area (%) Hardness
440A (S44002) 725 415 20 95 HRB
1790 1650 5 20 51 HRC
≤ 965
440B (S44003) 740 425 18 96 HRB
1930 1860 3 15 55 HRC
≤ 965
440C (S44004) 760 450 14 97 HRB
1970 1900 2 10 57 HRC
≤ 965

SS440 Heat Resistance

AISI 440 has good oxidation resistance in intermittent use below 815 °C and continuous use up to 760 °C in air.

Heat Treatment of SS440

SS440 heat treatment including annealing, quenching, tempering and stress relieving, etc.

Annealing

Subcritical annealing temperature range: 675-760 ℃ (1250-1400 ℉)

Full annealing: insulation from 845-900 °C (1550-1650 ℉) to completely soaking, then furnace cooling to 790 °C, continue cooling to 595 ° C at a cooling rate of 15-25 °C/h, then air cool to room temperature.

Isothermal Annealing: heat treat to 845-900 °C, kept at 690 °C for 4 hours.

SS440 Quenching

Heat to 1010-1065 °C and quench in air or oil. To ensure maximum dimensional stability, cold treatment should be performed immediately after cooling to room temperature

Package Process

1.with plastic cap to protect both ends

2.weaving bag wrapped outside the pipe

3.then pack into wooden case.

Image

Martensitic Stainless Steel Seamless Welded Pipe AISI 440A/B/C 40mm

Company introduction

Product tags

stainless steel welding fitting

,

ss steel fitting

,

stainless steel welding fittings
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Martensitic Stainless Steel Seamless Welded Pipe AISI 440A/B/C 40mm

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Product Detail
Brand Name :
Zheheng
Model Number :
440A/B/C
Certification :
ISO9001
Place of Origin :
Wenzhou,China
MOQ :
MOQ500kg
Payment Terms :
L/C, D/P, T/T, Western Union
Contact Supplier
Martensitic Stainless Steel Seamless Welded Pipe AISI 440A/B/C 40mm
Martensitic Stainless Steel Seamless Welded Pipe AISI 440A/B/C 40mm

Wenzhou Zheheng Steel Industry Co.,Ltd

Verified Supplier
8 Years
zhejiang, wenzhou
Since 1995
Business Type :
Manufacturer, Distributor/Wholesaler, Agent, Importer, Exporter, Trading Company
Main Products :
Stainless Steel Seamless Pipe, Seamless Stainless Steel Tubing, Stainless Steel Pipe Fittings
Total Annual :
6,000,000-8,000,000
Employee Number :
100~150
Certification Level :
Verified Supplier
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