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1.4542 ASTM S17400 630 Stainless Steel Seamless Tube SUS630 Cold Drawn

Categories Stainless Steel Seamless Tube
Brand Name: MITTEL
Model Number: S17400,630
Certification: SGS ISO MTC
Place of Origin: China Jiangsu
Price: 6.35 USD/KG
Payment Terms: L/C, T/T
Supply Ability: 50000KGS
Delivery Time: 14 Days
Packaging Details: Export Packing
Application: Construction,Decoration,Industry
Standard: ASTM
Steel grade: S17400,630
Type: Seamless
Welding line type: Seamless
Thickness: 1-95mm
Length: 3000mm~6000mm,Customer Request
Shape: Round.square.Rectangle
Outer diameter: 6-762mm
Technique: Cold Drawn
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1.4542 ASTM S17400 630 Stainless Steel Seamless Tube SUS630 Cold Drawn

630 is a 17-4 PH martensitic precipitation hardening stainless steel with a unique combination of high strength and good corrosive resistance. Supplied in either the H1075 (H580) aged condition with a tensile strength of 1000 Mpa minimum (HB 311 min.), or the H1150 (H620) double aged condition with a tensile strength of 930 Mpa minimum (HB 277 min.). It is characterised by high tensile strength and high yield strength obtained by solution annealing, followed by a single or double low temperature (precipitation) age hardening treatment. Coupled with a corosion resistance comparable to 304 austenitic stainless steel in many corrosive environments.630 in the H1075 (H580) aged condition can be re-aged if necessary at a higher temperature simply by heating at the required temperature for the required duration.630 in the H1075 (H580) And H1150 (H620) aged condition, can also be re-aged at a lower temperature by re-solution annealing, followed by age hardening at the required temperature for the required duration.It is used extensively by the Marine, Aerospace, Chemical, Petrochemical, Food Processing, Paper and general metalwork industries. Here it is employed for applications such as: Pump Shafts, Aircraft Fittings, Valve Stems, Hydraulic Fittings, Studs, Bushings, Screws, Fasteners, Couplings, Wear rings, Rollers and Food Handling Equipment etc..

Material Magnetic in all conditions.

Colour CodeStocked Sizes
(Bar end)

STOCKED SIZES15.88 mm to 304.8 mm diameter.
Bar Finish
Peeled, Cold Drawn, Turned and Centreless Ground.
Related Specifications
AustraliaAS 2837-1986-630
GermanyW.Nr 1.4542 X5CrNiCuNb17 4
W.Nr 1.4548 X5CrNiCuNb 17 4 4
JapanJIS G4303 SuS 630
ASTM A564/A564M-99-630
SAE J467 17-4 PH
UNS S17400


Chemical Composition
Min. %Max %
Mechanical Test Requirements in Solution Annealed and Age Hardened Conditions - At Room Temperature
*ConditionAH900 (H480)H925 (H495)H1025 (H550)H1075 (H580)H1100 (H595)H1150 (H620)H1150M (H620M)H1150D (H620D)
Ruling SectionUp to 200 mmUp to 200 mmUp to 200 mm
UTS Mpa (Min)1310117010701000965930795860
Yield Mpa (Min)117010701000860795725502725
Elongation % in 50mm (Min)1010121314161816
HardnessRc38 Max403835323128242433 Max
BHN363 Max388375331311302277255255331 Max
Impact Charpy - Vft/lbs (Min)5152025305530
Joules (Min)6.8202734417541
Typical Mechanical Properties - At Room Temperature
*ConditionAH900 (H480)H925 (H495)H1025 (H550)H1075 (H580)H1100 (H595)H1150 (H620)H1150M (H620M)H1150 (H620D)
UTS Mpa1100137513101170114010351000860950
Yield Mpa9001275120511401035930860600800
Elongation % in 50mm151414151617192220
Impact Charpy - Vft/lbs3015253540455010090
*Refer Age Hardening temperature table
Low Temperature Properties
Retains relatively good ductility at sub zero temperatures, with impact properties greatly improved at higher ageing temperatures:-
Typical sub zero charpy V-notch impact properties
Test TemperatureoF10-40-112-148-320
Impact StrengthH925
ft - lb
ft - lb
Cold Working
Cold bending etc. will be limited by the high yield strength in all conditions.
Corrosion Resistance
Superior to the martensitic stainless range in all conditions, and equal to 302 or 304 austenitic stainless grades in most environments.For optimum corrosion resistance, surfaces must be free of scale and foreign particles. Finished parts should be passivated.
Heat uniformly to 2150/2200oF (1177/1204oC) - Hold for 1 hour at temperature prior to commencing forging.Do not forge below 1850oF (1010oC). Finished forgings should be cooled in air to below 90oF (32oC) prior to further processing in order to obtain optimum grain size and mechanical properties.Finally forgings will require to be solution annealed prior to age hardening as required.
Heat Treatment
Solution Annealed - Condition A
Heat to 1900 +/- 25oF (1040 +/- 15oC) - *Hold for 30 MinutesSections up to 75 mm - Oil Quench To Below 90oF (32oC) Sections over 75mm - Air Cool To Below 90oF (32oC)*Actual holding time should be long enough to ensure that the part is heated thoroughly through out its section
Age Hardening
Material in the solution annealed condition may be age hardened as follows:-*Denotes Double Overaged
ConditionH900 (H480)H925 (H495)H1025 (H550)H1075 (H580)H1100 (H595)H1150 (H620)H1150M (H620M)*PlusH1150D (H620D)*Plus
Heat to±15oF900oF925 oF1025oF1075oF1100oF1150oF1400oF1150oF1150oF1150oF
Hold for Hours1444442444
Cool to Below
90oF (32oC)
Notes on Heat Treatment And It's Effect On Structure - Corrosion Resistance Etc
The martensitic transformation temperature range for this grade is:-

Therefore to ensure complete transformation to martensite, it is most important that parts are always cooled to below 90oF (32oC) within 24 hours following Solution Annealing and before Age Hardening Treatment which should also be followed by an air cool to below 90oF (32oC).

The age hardening tempers the martensite resulting in an improvement in toughness. The higher the ageing temperature the more refined the martensite leading to greater ductility but slightly lower strength.

N.B. Temperature control is critical during age hardening and any variations outside the given range could lead to less than satisfactory results.

In the solution annealed condition resistance to stress corrosion cracking is low - improving at age hardening temperatures from 1025oF (550oC) upwards to a maximum at 1150oF (620oC) double aged.

Dimensional Changes During Heat Treatment
Age hardening results in a slight dimensional contraction as follows:-Condition A to condition H900 (H480) - contraction 0.0004/0.0006 M/M Condition A to condition H1150 (H620) - contraction 0.0009/0.0012 M/M
Machinability in the solution annealed condition is similar to 302 and 304 austenitic stainless steel grades.Machinablity in the H900 (H480) condition is limited, improving as the age hardening temperature is increased to optimum machinability similar to 304 austenitic stainless steel grade in the H1150 (H620) condition.
Removing Heat Tint
The heat tint formed during age hardening, whilst having little effect on corrosion resistance, may be removed when required for appearance purposes by pickling or electro polishing.
Grinding and Polishing
440C in the hardened and tempered condition requires care with finish grinding and polishing to avoid overheating as this can lower the hardness and corrosion resistance.
Elevated Temperature Use
Excellent oxidation resistance up to 1100oF (540oC).Exposure to temperature range 600 - 900oF (290 - 480oC) long term may result in reduced toughness but this can sometimes be minimilized by using higher ageing temperatures. As a general guide for short term exposure at elevated temperatures the ageing temperature should be at least 50oF (28oC) above the working temperature.
May be welded satisfactorily by shielded fusion and resistance welded processes, however oxyacetylene welding is not recommended due to the posibility of carbon pick up Filler metal when required should be similar to the parent metal if strength is important otherwise standard austenitic stainless filler wire 308L may be satisfactory. Pre-heating is not generally required.Welding in the solution annealed condition may be carried out satisfactorily, however welding in the H1150 (H620) condition reduces the effects of high welding stresses. Following welding in the solution annealed condition, parts can be directly age hardened as required, however those in the H1150 (H620) condition should be re-solution annealed and then age hardened as required.

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